dc3cdfede9
Summary:
This fixes the following scenario we've hit:
- we reached max_total_wal_size, created a new wal and scheduled flushing all memtables corresponding to the old one,
- before the last of these flushes started its column family was dropped; the last background flush call was a no-op; no one removed the old wal from alive_logs_,
- hours have passed and no flushes happened even though lots of data was written; data is written to different column families, compactions are disabled; old column families are dropped before memtable grows big enough to trigger a flush; the old wal still sits in alive_logs_ preventing max_total_wal_size limit from kicking in,
- a few more hours pass and we run out disk space because of one huge .log file.
Test Plan: `make check`; backported the new test, checked that it fails without this diff
Reviewers: igor
Reviewed By: igor
Subscribers: dhruba
Differential Revision: https://reviews.facebook.net/D40893
(cherry picked from commit 218487d8dc)
4597 lines
159 KiB
C++
4597 lines
159 KiB
C++
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "db/db_impl.h"
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#ifndef __STDC_FORMAT_MACROS
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#define __STDC_FORMAT_MACROS
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#endif
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#include <inttypes.h>
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#include <algorithm>
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#include <climits>
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#include <cstdio>
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#include <set>
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#include <stdexcept>
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#include <stdint.h>
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#include <string>
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#include <unordered_set>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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#include "db/builder.h"
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#include "db/flush_job.h"
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#include "db/compaction_job.h"
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#include "db/db_iter.h"
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#include "db/dbformat.h"
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#include "db/event_helpers.h"
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#include "db/filename.h"
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#include "db/job_context.h"
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#include "db/log_reader.h"
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#include "db/log_writer.h"
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#include "db/managed_iterator.h"
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#include "db/memtable.h"
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#include "db/memtable_list.h"
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#include "db/merge_context.h"
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#include "db/merge_helper.h"
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#include "db/table_cache.h"
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#include "db/table_properties_collector.h"
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#include "db/forward_iterator.h"
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#include "db/transaction_log_impl.h"
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#include "db/version_set.h"
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#include "db/writebuffer.h"
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#include "db/write_batch_internal.h"
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#include "db/write_callback.h"
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#include "port/port.h"
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#include "rocksdb/cache.h"
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#include "port/likely.h"
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#include "rocksdb/compaction_filter.h"
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#include "rocksdb/db.h"
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#include "rocksdb/env.h"
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#include "rocksdb/merge_operator.h"
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#include "rocksdb/version.h"
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#include "rocksdb/statistics.h"
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#include "rocksdb/status.h"
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#include "rocksdb/table.h"
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#include "table/block.h"
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#include "table/block_based_table_factory.h"
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#include "table/merger.h"
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#include "table/table_builder.h"
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#include "table/two_level_iterator.h"
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#include "util/auto_roll_logger.h"
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#include "util/autovector.h"
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#include "util/build_version.h"
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#include "util/coding.h"
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#include "util/compression.h"
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#include "util/db_info_dumper.h"
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#include "util/file_util.h"
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#include "util/hash_skiplist_rep.h"
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#include "util/hash_linklist_rep.h"
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#include "util/logging.h"
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#include "util/log_buffer.h"
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#include "util/mutexlock.h"
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#include "util/perf_context_imp.h"
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#include "util/iostats_context_imp.h"
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#include "util/stop_watch.h"
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#include "util/sync_point.h"
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#include "util/string_util.h"
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#include "util/thread_status_updater.h"
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#include "util/thread_status_util.h"
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#include "util/xfunc.h"
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namespace rocksdb {
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const std::string kDefaultColumnFamilyName("default");
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void DumpRocksDBBuildVersion(Logger * log);
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struct DBImpl::WriteContext {
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autovector<SuperVersion*> superversions_to_free_;
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autovector<MemTable*> memtables_to_free_;
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~WriteContext() {
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for (auto& sv : superversions_to_free_) {
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delete sv;
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}
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for (auto& m : memtables_to_free_) {
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delete m;
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}
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}
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};
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Options SanitizeOptions(const std::string& dbname,
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const InternalKeyComparator* icmp,
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const Options& src) {
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auto db_options = SanitizeOptions(dbname, DBOptions(src));
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auto cf_options = SanitizeOptions(db_options, icmp, ColumnFamilyOptions(src));
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return Options(db_options, cf_options);
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}
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DBOptions SanitizeOptions(const std::string& dbname, const DBOptions& src) {
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DBOptions result = src;
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// result.max_open_files means an "infinite" open files.
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if (result.max_open_files != -1) {
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ClipToRange(&result.max_open_files, 20, 1000000);
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}
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if (result.info_log == nullptr) {
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Status s = CreateLoggerFromOptions(dbname, result.db_log_dir, src.env,
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result, &result.info_log);
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if (!s.ok()) {
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// No place suitable for logging
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result.info_log = nullptr;
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}
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}
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result.env->IncBackgroundThreadsIfNeeded(src.max_background_compactions,
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Env::Priority::LOW);
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result.env->IncBackgroundThreadsIfNeeded(src.max_background_flushes,
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Env::Priority::HIGH);
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if (result.rate_limiter.get() != nullptr) {
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if (result.bytes_per_sync == 0) {
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result.bytes_per_sync = 1024 * 1024;
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}
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}
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if (result.wal_dir.empty()) {
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// Use dbname as default
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result.wal_dir = dbname;
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}
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if (result.wal_dir.back() == '/') {
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result.wal_dir = result.wal_dir.substr(0, result.wal_dir.size() - 1);
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}
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if (result.db_paths.size() == 0) {
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result.db_paths.emplace_back(dbname, std::numeric_limits<uint64_t>::max());
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}
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return result;
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}
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namespace {
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Status SanitizeOptionsByTable(
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const DBOptions& db_opts,
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const std::vector<ColumnFamilyDescriptor>& column_families) {
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Status s;
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for (auto cf : column_families) {
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s = cf.options.table_factory->SanitizeOptions(db_opts, cf.options);
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if (!s.ok()) {
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return s;
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}
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}
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return Status::OK();
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}
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CompressionType GetCompressionFlush(const ImmutableCFOptions& ioptions) {
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// Compressing memtable flushes might not help unless the sequential load
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// optimization is used for leveled compaction. Otherwise the CPU and
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// latency overhead is not offset by saving much space.
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bool can_compress;
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if (ioptions.compaction_style == kCompactionStyleUniversal) {
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can_compress =
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(ioptions.compaction_options_universal.compression_size_percent < 0);
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} else {
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// For leveled compress when min_level_to_compress == 0.
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can_compress = ioptions.compression_per_level.empty() ||
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ioptions.compression_per_level[0] != kNoCompression;
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}
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if (can_compress) {
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return ioptions.compression;
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} else {
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return kNoCompression;
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}
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}
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void DumpCompressionInfo(Logger* logger) {
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Log(InfoLogLevel::INFO_LEVEL, logger, "Compression algorithms supported:");
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Log(InfoLogLevel::INFO_LEVEL, logger, "\tSnappy supported: %d",
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Snappy_Supported());
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Log(InfoLogLevel::INFO_LEVEL, logger, "\tZlib supported: %d",
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Zlib_Supported());
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Log(InfoLogLevel::INFO_LEVEL, logger, "\tBzip supported: %d",
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BZip2_Supported());
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Log(InfoLogLevel::INFO_LEVEL, logger, "\tLZ4 supported: %d", LZ4_Supported());
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}
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} // namespace
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DBImpl::DBImpl(const DBOptions& options, const std::string& dbname)
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: env_(options.env),
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dbname_(dbname),
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db_options_(SanitizeOptions(dbname, options)),
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stats_(db_options_.statistics.get()),
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db_lock_(nullptr),
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mutex_(stats_, env_, DB_MUTEX_WAIT_MICROS, options.use_adaptive_mutex),
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shutting_down_(false),
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bg_cv_(&mutex_),
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logfile_number_(0),
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log_dir_synced_(false),
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log_empty_(true),
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default_cf_handle_(nullptr),
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total_log_size_(0),
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max_total_in_memory_state_(0),
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is_snapshot_supported_(true),
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write_buffer_(options.db_write_buffer_size),
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write_controller_(options.delayed_write_rate),
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last_batch_group_size_(0),
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unscheduled_flushes_(0),
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unscheduled_compactions_(0),
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bg_compaction_scheduled_(0),
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bg_manual_only_(0),
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bg_flush_scheduled_(0),
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manual_compaction_(nullptr),
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disable_delete_obsolete_files_(0),
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delete_obsolete_files_next_run_(
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options.env->NowMicros() +
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db_options_.delete_obsolete_files_period_micros),
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last_stats_dump_time_microsec_(0),
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next_job_id_(1),
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flush_on_destroy_(false),
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env_options_(db_options_),
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#ifndef ROCKSDB_LITE
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wal_manager_(db_options_, env_options_),
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#endif // ROCKSDB_LITE
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event_logger_(db_options_.info_log.get()),
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bg_work_gate_closed_(false),
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refitting_level_(false),
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opened_successfully_(false) {
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env_->GetAbsolutePath(dbname, &db_absolute_path_);
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// Reserve ten files or so for other uses and give the rest to TableCache.
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// Give a large number for setting of "infinite" open files.
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const int table_cache_size = (db_options_.max_open_files == -1) ?
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4194304 : db_options_.max_open_files - 10;
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table_cache_ =
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NewLRUCache(table_cache_size, db_options_.table_cache_numshardbits);
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versions_.reset(new VersionSet(dbname_, &db_options_, env_options_,
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table_cache_.get(), &write_buffer_,
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&write_controller_));
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column_family_memtables_.reset(new ColumnFamilyMemTablesImpl(
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versions_->GetColumnFamilySet(), &flush_scheduler_));
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DumpRocksDBBuildVersion(db_options_.info_log.get());
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DumpDBFileSummary(db_options_, dbname_);
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db_options_.Dump(db_options_.info_log.get());
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DumpCompressionInfo(db_options_.info_log.get());
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LogFlush(db_options_.info_log);
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}
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// Will lock the mutex_, will wait for completion if wait is true
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void DBImpl::CancelAllBackgroundWork(bool wait) {
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InstrumentedMutexLock l(&mutex_);
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shutting_down_.store(true, std::memory_order_release);
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bg_cv_.SignalAll();
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if (!wait) {
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return;
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}
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// Wait for background work to finish
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while (bg_compaction_scheduled_ || bg_flush_scheduled_) {
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bg_cv_.Wait();
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}
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}
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DBImpl::~DBImpl() {
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mutex_.Lock();
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if (!shutting_down_.load(std::memory_order_acquire) && flush_on_destroy_) {
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for (auto cfd : *versions_->GetColumnFamilySet()) {
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if (!cfd->IsDropped() && !cfd->mem()->IsEmpty()) {
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cfd->Ref();
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mutex_.Unlock();
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FlushMemTable(cfd, FlushOptions());
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mutex_.Lock();
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cfd->Unref();
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}
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}
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versions_->GetColumnFamilySet()->FreeDeadColumnFamilies();
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}
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mutex_.Unlock();
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// CancelAllBackgroundWork called with false means we just set the shutdown
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// marker. After this we do a variant of the waiting and unschedule work
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// (to consider: moving all the waiting into CancelAllBackgroundWork(true))
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CancelAllBackgroundWork(false);
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int compactions_unscheduled = env_->UnSchedule(this, Env::Priority::LOW);
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int flushes_unscheduled = env_->UnSchedule(this, Env::Priority::HIGH);
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mutex_.Lock();
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bg_compaction_scheduled_ -= compactions_unscheduled;
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bg_flush_scheduled_ -= flushes_unscheduled;
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// Wait for background work to finish
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while (bg_compaction_scheduled_ || bg_flush_scheduled_) {
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bg_cv_.Wait();
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}
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EraseThreadStatusDbInfo();
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flush_scheduler_.Clear();
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while (!flush_queue_.empty()) {
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auto cfd = PopFirstFromFlushQueue();
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if (cfd->Unref()) {
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delete cfd;
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}
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}
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while (!compaction_queue_.empty()) {
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auto cfd = PopFirstFromCompactionQueue();
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if (cfd->Unref()) {
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delete cfd;
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}
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}
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if (default_cf_handle_ != nullptr) {
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// we need to delete handle outside of lock because it does its own locking
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mutex_.Unlock();
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delete default_cf_handle_;
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mutex_.Lock();
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}
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// Clean up obsolete files due to SuperVersion release.
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// (1) Need to delete to obsolete files before closing because RepairDB()
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// scans all existing files in the file system and builds manifest file.
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// Keeping obsolete files confuses the repair process.
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// (2) Need to check if we Open()/Recover() the DB successfully before
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// deleting because if VersionSet recover fails (may be due to corrupted
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// manifest file), it is not able to identify live files correctly. As a
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// result, all "live" files can get deleted by accident. However, corrupted
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// manifest is recoverable by RepairDB().
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if (opened_successfully_) {
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JobContext job_context(next_job_id_.fetch_add(1));
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FindObsoleteFiles(&job_context, true);
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mutex_.Unlock();
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// manifest number starting from 2
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job_context.manifest_file_number = 1;
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if (job_context.HaveSomethingToDelete()) {
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PurgeObsoleteFiles(job_context);
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}
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job_context.Clean();
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mutex_.Lock();
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}
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for (auto l : logs_to_free_) {
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delete l;
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}
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// versions need to be destroyed before table_cache since it can hold
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// references to table_cache.
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versions_.reset();
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mutex_.Unlock();
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if (db_lock_ != nullptr) {
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env_->UnlockFile(db_lock_);
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}
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LogFlush(db_options_.info_log);
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}
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Status DBImpl::NewDB() {
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VersionEdit new_db;
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new_db.SetLogNumber(0);
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new_db.SetNextFile(2);
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new_db.SetLastSequence(0);
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Log(InfoLogLevel::INFO_LEVEL,
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db_options_.info_log, "Creating manifest 1 \n");
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const std::string manifest = DescriptorFileName(dbname_, 1);
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unique_ptr<WritableFile> file;
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Status s = env_->NewWritableFile(
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manifest, &file, env_->OptimizeForManifestWrite(env_options_));
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if (!s.ok()) {
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return s;
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}
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file->SetPreallocationBlockSize(db_options_.manifest_preallocation_size);
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{
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log::Writer log(std::move(file));
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std::string record;
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new_db.EncodeTo(&record);
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s = log.AddRecord(record);
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if (s.ok()) {
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s = SyncManifest(env_, &db_options_, log.file());
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}
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}
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if (s.ok()) {
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// Make "CURRENT" file that points to the new manifest file.
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s = SetCurrentFile(env_, dbname_, 1, directories_.GetDbDir());
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} else {
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env_->DeleteFile(manifest);
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}
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return s;
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}
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void DBImpl::MaybeIgnoreError(Status* s) const {
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if (s->ok() || db_options_.paranoid_checks) {
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// No change needed
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} else {
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Log(InfoLogLevel::WARN_LEVEL,
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db_options_.info_log, "Ignoring error %s", s->ToString().c_str());
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*s = Status::OK();
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}
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}
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const Status DBImpl::CreateArchivalDirectory() {
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if (db_options_.WAL_ttl_seconds > 0 || db_options_.WAL_size_limit_MB > 0) {
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std::string archivalPath = ArchivalDirectory(db_options_.wal_dir);
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return env_->CreateDirIfMissing(archivalPath);
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}
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return Status::OK();
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}
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void DBImpl::PrintStatistics() {
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auto dbstats = db_options_.statistics.get();
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if (dbstats) {
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Log(InfoLogLevel::WARN_LEVEL, db_options_.info_log,
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"STATISTICS:\n %s",
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dbstats->ToString().c_str());
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}
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}
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void DBImpl::MaybeDumpStats() {
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if (db_options_.stats_dump_period_sec == 0) return;
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const uint64_t now_micros = env_->NowMicros();
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if (last_stats_dump_time_microsec_ +
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db_options_.stats_dump_period_sec * 1000000
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<= now_micros) {
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// Multiple threads could race in here simultaneously.
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// However, the last one will update last_stats_dump_time_microsec_
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// atomically. We could see more than one dump during one dump
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// period in rare cases.
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last_stats_dump_time_microsec_ = now_micros;
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#ifndef ROCKSDB_LITE
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bool tmp1 = false;
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bool tmp2 = false;
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DBPropertyType cf_property_type =
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GetPropertyType(DB::Properties::kCFStats, &tmp1, &tmp2);
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DBPropertyType db_property_type =
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GetPropertyType(DB::Properties::kDBStats, &tmp1, &tmp2);
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std::string stats;
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{
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InstrumentedMutexLock l(&mutex_);
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for (auto cfd : *versions_->GetColumnFamilySet()) {
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cfd->internal_stats()->GetStringProperty(cf_property_type,
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DB::Properties::kCFStats,
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&stats);
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}
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default_cf_internal_stats_->GetStringProperty(db_property_type,
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DB::Properties::kDBStats,
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&stats);
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}
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Log(InfoLogLevel::WARN_LEVEL,
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db_options_.info_log, "------- DUMPING STATS -------");
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Log(InfoLogLevel::WARN_LEVEL,
|
|
db_options_.info_log, "%s", stats.c_str());
|
|
#endif // !ROCKSDB_LITE
|
|
|
|
PrintStatistics();
|
|
}
|
|
}
|
|
|
|
// * Returns the list of live files in 'sst_live'
|
|
// If it's doing full scan:
|
|
// * Returns the list of all files in the filesystem in
|
|
// 'full_scan_candidate_files'.
|
|
// Otherwise, gets obsolete files from VersionSet.
|
|
// no_full_scan = true -- never do the full scan using GetChildren()
|
|
// force = false -- don't force the full scan, except every
|
|
// db_options_.delete_obsolete_files_period_micros
|
|
// force = true -- force the full scan
|
|
void DBImpl::FindObsoleteFiles(JobContext* job_context, bool force,
|
|
bool no_full_scan) {
|
|
mutex_.AssertHeld();
|
|
|
|
// if deletion is disabled, do nothing
|
|
if (disable_delete_obsolete_files_ > 0) {
|
|
return;
|
|
}
|
|
|
|
bool doing_the_full_scan = false;
|
|
|
|
// logic for figurint out if we're doing the full scan
|
|
if (no_full_scan) {
|
|
doing_the_full_scan = false;
|
|
} else if (force || db_options_.delete_obsolete_files_period_micros == 0) {
|
|
doing_the_full_scan = true;
|
|
} else {
|
|
const uint64_t now_micros = env_->NowMicros();
|
|
if (delete_obsolete_files_next_run_ < now_micros) {
|
|
doing_the_full_scan = true;
|
|
delete_obsolete_files_next_run_ =
|
|
now_micros + db_options_.delete_obsolete_files_period_micros;
|
|
}
|
|
}
|
|
|
|
// don't delete files that might be currently written to from compaction
|
|
// threads
|
|
if (!pending_outputs_.empty()) {
|
|
job_context->min_pending_output = *pending_outputs_.begin();
|
|
} else {
|
|
// delete all of them
|
|
job_context->min_pending_output = std::numeric_limits<uint64_t>::max();
|
|
}
|
|
|
|
// Get obsolete files. This function will also update the list of
|
|
// pending files in VersionSet().
|
|
versions_->GetObsoleteFiles(&job_context->sst_delete_files,
|
|
job_context->min_pending_output);
|
|
|
|
uint64_t min_log_number = versions_->MinLogNumber();
|
|
if (!alive_log_files_.empty()) {
|
|
// find newly obsoleted log files
|
|
while (alive_log_files_.begin()->number < min_log_number) {
|
|
auto& earliest = *alive_log_files_.begin();
|
|
job_context->log_delete_files.push_back(earliest.number);
|
|
total_log_size_ -= earliest.size;
|
|
alive_log_files_.pop_front();
|
|
// Current log should always stay alive since it can't have
|
|
// number < MinLogNumber().
|
|
assert(alive_log_files_.size());
|
|
}
|
|
}
|
|
|
|
// We're just cleaning up for DB::Write().
|
|
job_context->logs_to_free = logs_to_free_;
|
|
logs_to_free_.clear();
|
|
|
|
// store the current filenum, lognum, etc
|
|
job_context->manifest_file_number = versions_->manifest_file_number();
|
|
job_context->pending_manifest_file_number =
|
|
versions_->pending_manifest_file_number();
|
|
job_context->log_number = versions_->MinLogNumber();
|
|
job_context->prev_log_number = versions_->prev_log_number();
|
|
|
|
versions_->AddLiveFiles(&job_context->sst_live);
|
|
if (doing_the_full_scan) {
|
|
for (uint32_t path_id = 0; path_id < db_options_.db_paths.size();
|
|
path_id++) {
|
|
// set of all files in the directory. We'll exclude files that are still
|
|
// alive in the subsequent processings.
|
|
std::vector<std::string> files;
|
|
env_->GetChildren(db_options_.db_paths[path_id].path,
|
|
&files); // Ignore errors
|
|
for (std::string file : files) {
|
|
// TODO(icanadi) clean up this mess to avoid having one-off "/" prefixes
|
|
job_context->full_scan_candidate_files.emplace_back("/" + file,
|
|
path_id);
|
|
}
|
|
}
|
|
|
|
//Add log files in wal_dir
|
|
if (db_options_.wal_dir != dbname_) {
|
|
std::vector<std::string> log_files;
|
|
env_->GetChildren(db_options_.wal_dir, &log_files); // Ignore errors
|
|
for (std::string log_file : log_files) {
|
|
job_context->full_scan_candidate_files.emplace_back(log_file, 0);
|
|
}
|
|
}
|
|
// Add info log files in db_log_dir
|
|
if (!db_options_.db_log_dir.empty() && db_options_.db_log_dir != dbname_) {
|
|
std::vector<std::string> info_log_files;
|
|
// Ignore errors
|
|
env_->GetChildren(db_options_.db_log_dir, &info_log_files);
|
|
for (std::string log_file : info_log_files) {
|
|
job_context->full_scan_candidate_files.emplace_back(log_file, 0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
bool CompareCandidateFile(const JobContext::CandidateFileInfo& first,
|
|
const JobContext::CandidateFileInfo& second) {
|
|
if (first.file_name > second.file_name) {
|
|
return true;
|
|
} else if (first.file_name < second.file_name) {
|
|
return false;
|
|
} else {
|
|
return (first.path_id > second.path_id);
|
|
}
|
|
}
|
|
}; // namespace
|
|
|
|
// Diffs the files listed in filenames and those that do not
|
|
// belong to live files are posibly removed. Also, removes all the
|
|
// files in sst_delete_files and log_delete_files.
|
|
// It is not necessary to hold the mutex when invoking this method.
|
|
void DBImpl::PurgeObsoleteFiles(const JobContext& state) {
|
|
// we'd better have sth to delete
|
|
assert(state.HaveSomethingToDelete());
|
|
|
|
// this checks if FindObsoleteFiles() was run before. If not, don't do
|
|
// PurgeObsoleteFiles(). If FindObsoleteFiles() was run, we need to also
|
|
// run PurgeObsoleteFiles(), even if disable_delete_obsolete_files_ is true
|
|
if (state.manifest_file_number == 0) {
|
|
return;
|
|
}
|
|
|
|
// Now, convert live list to an unordered map, WITHOUT mutex held;
|
|
// set is slow.
|
|
std::unordered_map<uint64_t, const FileDescriptor*> sst_live_map;
|
|
for (const FileDescriptor& fd : state.sst_live) {
|
|
sst_live_map[fd.GetNumber()] = &fd;
|
|
}
|
|
|
|
auto candidate_files = state.full_scan_candidate_files;
|
|
candidate_files.reserve(candidate_files.size() +
|
|
state.sst_delete_files.size() +
|
|
state.log_delete_files.size());
|
|
// We may ignore the dbname when generating the file names.
|
|
const char* kDumbDbName = "";
|
|
for (auto file : state.sst_delete_files) {
|
|
candidate_files.emplace_back(
|
|
MakeTableFileName(kDumbDbName, file->fd.GetNumber()),
|
|
file->fd.GetPathId());
|
|
delete file;
|
|
}
|
|
|
|
for (auto file_num : state.log_delete_files) {
|
|
if (file_num > 0) {
|
|
candidate_files.emplace_back(LogFileName(kDumbDbName, file_num).substr(1),
|
|
0);
|
|
}
|
|
}
|
|
|
|
// dedup state.candidate_files so we don't try to delete the same
|
|
// file twice
|
|
sort(candidate_files.begin(), candidate_files.end(), CompareCandidateFile);
|
|
candidate_files.erase(unique(candidate_files.begin(), candidate_files.end()),
|
|
candidate_files.end());
|
|
|
|
std::vector<std::string> old_info_log_files;
|
|
InfoLogPrefix info_log_prefix(!db_options_.db_log_dir.empty(), dbname_);
|
|
for (const auto& candidate_file : candidate_files) {
|
|
std::string to_delete = candidate_file.file_name;
|
|
uint32_t path_id = candidate_file.path_id;
|
|
uint64_t number;
|
|
FileType type;
|
|
// Ignore file if we cannot recognize it.
|
|
if (!ParseFileName(to_delete, &number, info_log_prefix.prefix, &type)) {
|
|
continue;
|
|
}
|
|
|
|
bool keep = true;
|
|
switch (type) {
|
|
case kLogFile:
|
|
keep = ((number >= state.log_number) ||
|
|
(number == state.prev_log_number));
|
|
break;
|
|
case kDescriptorFile:
|
|
// Keep my manifest file, and any newer incarnations'
|
|
// (can happen during manifest roll)
|
|
keep = (number >= state.manifest_file_number);
|
|
break;
|
|
case kTableFile:
|
|
// If the second condition is not there, this makes
|
|
// DontDeletePendingOutputs fail
|
|
keep = (sst_live_map.find(number) != sst_live_map.end()) ||
|
|
number >= state.min_pending_output;
|
|
break;
|
|
case kTempFile:
|
|
// Any temp files that are currently being written to must
|
|
// be recorded in pending_outputs_, which is inserted into "live".
|
|
// Also, SetCurrentFile creates a temp file when writing out new
|
|
// manifest, which is equal to state.pending_manifest_file_number. We
|
|
// should not delete that file
|
|
keep = (sst_live_map.find(number) != sst_live_map.end()) ||
|
|
(number == state.pending_manifest_file_number);
|
|
break;
|
|
case kInfoLogFile:
|
|
keep = true;
|
|
if (number != 0) {
|
|
old_info_log_files.push_back(to_delete);
|
|
}
|
|
break;
|
|
case kCurrentFile:
|
|
case kDBLockFile:
|
|
case kIdentityFile:
|
|
case kMetaDatabase:
|
|
keep = true;
|
|
break;
|
|
}
|
|
|
|
if (keep) {
|
|
continue;
|
|
}
|
|
|
|
std::string fname;
|
|
if (type == kTableFile) {
|
|
// evict from cache
|
|
TableCache::Evict(table_cache_.get(), number);
|
|
fname = TableFileName(db_options_.db_paths, number, path_id);
|
|
} else {
|
|
fname = ((type == kLogFile) ?
|
|
db_options_.wal_dir : dbname_) + "/" + to_delete;
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
if (type == kLogFile && (db_options_.WAL_ttl_seconds > 0 ||
|
|
db_options_.WAL_size_limit_MB > 0)) {
|
|
wal_manager_.ArchiveWALFile(fname, number);
|
|
continue;
|
|
}
|
|
#endif // !ROCKSDB_LITE
|
|
auto file_deletion_status = env_->DeleteFile(fname);
|
|
if (file_deletion_status.ok()) {
|
|
Log(InfoLogLevel::DEBUG_LEVEL, db_options_.info_log,
|
|
"[JOB %d] Delete %s type=%d #%" PRIu64 " -- %s\n", state.job_id,
|
|
fname.c_str(), type, number,
|
|
file_deletion_status.ToString().c_str());
|
|
} else {
|
|
Log(InfoLogLevel::ERROR_LEVEL, db_options_.info_log,
|
|
"[JOB %d] Failed to delete %s type=%d #%" PRIu64 " -- %s\n",
|
|
state.job_id, fname.c_str(), type, number,
|
|
file_deletion_status.ToString().c_str());
|
|
}
|
|
if (type == kTableFile) {
|
|
EventHelpers::LogAndNotifyTableFileDeletion(
|
|
&event_logger_, state.job_id, number, fname,
|
|
file_deletion_status, GetName(),
|
|
db_options_.listeners);
|
|
}
|
|
}
|
|
|
|
// Delete old info log files.
|
|
size_t old_info_log_file_count = old_info_log_files.size();
|
|
if (old_info_log_file_count >= db_options_.keep_log_file_num) {
|
|
std::sort(old_info_log_files.begin(), old_info_log_files.end());
|
|
size_t end = old_info_log_file_count - db_options_.keep_log_file_num;
|
|
for (unsigned int i = 0; i <= end; i++) {
|
|
std::string& to_delete = old_info_log_files.at(i);
|
|
std::string full_path_to_delete = (db_options_.db_log_dir.empty() ?
|
|
dbname_ : db_options_.db_log_dir) + "/" + to_delete;
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"[JOB %d] Delete info log file %s\n", state.job_id,
|
|
full_path_to_delete.c_str());
|
|
Status s = env_->DeleteFile(full_path_to_delete);
|
|
if (!s.ok()) {
|
|
Log(InfoLogLevel::ERROR_LEVEL, db_options_.info_log,
|
|
"[JOB %d] Delete info log file %s FAILED -- %s\n", state.job_id,
|
|
to_delete.c_str(), s.ToString().c_str());
|
|
}
|
|
}
|
|
}
|
|
#ifndef ROCKSDB_LITE
|
|
wal_manager_.PurgeObsoleteWALFiles();
|
|
#endif // ROCKSDB_LITE
|
|
LogFlush(db_options_.info_log);
|
|
}
|
|
|
|
void DBImpl::DeleteObsoleteFiles() {
|
|
mutex_.AssertHeld();
|
|
JobContext job_context(next_job_id_.fetch_add(1));
|
|
FindObsoleteFiles(&job_context, true);
|
|
|
|
mutex_.Unlock();
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
PurgeObsoleteFiles(job_context);
|
|
}
|
|
job_context.Clean();
|
|
mutex_.Lock();
|
|
}
|
|
|
|
Status DBImpl::Directories::CreateAndNewDirectory(
|
|
Env* env, const std::string& dirname,
|
|
std::unique_ptr<Directory>* directory) const {
|
|
// We call CreateDirIfMissing() as the directory may already exist (if we
|
|
// are reopening a DB), when this happens we don't want creating the
|
|
// directory to cause an error. However, we need to check if creating the
|
|
// directory fails or else we may get an obscure message about the lock
|
|
// file not existing. One real-world example of this occurring is if
|
|
// env->CreateDirIfMissing() doesn't create intermediate directories, e.g.
|
|
// when dbname_ is "dir/db" but when "dir" doesn't exist.
|
|
Status s = env->CreateDirIfMissing(dirname);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
return env->NewDirectory(dirname, directory);
|
|
}
|
|
|
|
Status DBImpl::Directories::SetDirectories(
|
|
Env* env, const std::string& dbname, const std::string& wal_dir,
|
|
const std::vector<DbPath>& data_paths) {
|
|
Status s = CreateAndNewDirectory(env, dbname, &db_dir_);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
if (!wal_dir.empty() && dbname != wal_dir) {
|
|
s = CreateAndNewDirectory(env, wal_dir, &wal_dir_);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
}
|
|
|
|
data_dirs_.clear();
|
|
for (auto& p : data_paths) {
|
|
const std::string db_path = p.path;
|
|
if (db_path == dbname) {
|
|
data_dirs_.emplace_back(nullptr);
|
|
} else {
|
|
std::unique_ptr<Directory> path_directory;
|
|
s = CreateAndNewDirectory(env, db_path, &path_directory);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
data_dirs_.emplace_back(path_directory.release());
|
|
}
|
|
}
|
|
assert(data_dirs_.size() == data_paths.size());
|
|
return Status::OK();
|
|
}
|
|
|
|
Directory* DBImpl::Directories::GetDataDir(size_t path_id) {
|
|
assert(path_id < data_dirs_.size());
|
|
Directory* ret_dir = data_dirs_[path_id].get();
|
|
if (ret_dir == nullptr) {
|
|
// Should use db_dir_
|
|
return db_dir_.get();
|
|
}
|
|
return ret_dir;
|
|
}
|
|
|
|
Status DBImpl::Recover(
|
|
const std::vector<ColumnFamilyDescriptor>& column_families, bool read_only,
|
|
bool error_if_log_file_exist) {
|
|
mutex_.AssertHeld();
|
|
|
|
bool is_new_db = false;
|
|
assert(db_lock_ == nullptr);
|
|
if (!read_only) {
|
|
Status s = directories_.SetDirectories(env_, dbname_, db_options_.wal_dir,
|
|
db_options_.db_paths);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
s = env_->LockFile(LockFileName(dbname_), &db_lock_);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
if (!env_->FileExists(CurrentFileName(dbname_))) {
|
|
if (db_options_.create_if_missing) {
|
|
s = NewDB();
|
|
is_new_db = true;
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
} else {
|
|
return Status::InvalidArgument(
|
|
dbname_, "does not exist (create_if_missing is false)");
|
|
}
|
|
} else {
|
|
if (db_options_.error_if_exists) {
|
|
return Status::InvalidArgument(
|
|
dbname_, "exists (error_if_exists is true)");
|
|
}
|
|
}
|
|
// Check for the IDENTITY file and create it if not there
|
|
if (!env_->FileExists(IdentityFileName(dbname_))) {
|
|
s = SetIdentityFile(env_, dbname_);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
}
|
|
}
|
|
|
|
Status s = versions_->Recover(column_families, read_only);
|
|
if (db_options_.paranoid_checks && s.ok()) {
|
|
s = CheckConsistency();
|
|
}
|
|
if (s.ok()) {
|
|
SequenceNumber max_sequence(kMaxSequenceNumber);
|
|
default_cf_handle_ = new ColumnFamilyHandleImpl(
|
|
versions_->GetColumnFamilySet()->GetDefault(), this, &mutex_);
|
|
default_cf_internal_stats_ = default_cf_handle_->cfd()->internal_stats();
|
|
single_column_family_mode_ =
|
|
versions_->GetColumnFamilySet()->NumberOfColumnFamilies() == 1;
|
|
|
|
// Recover from all newer log files than the ones named in the
|
|
// descriptor (new log files may have been added by the previous
|
|
// incarnation without registering them in the descriptor).
|
|
//
|
|
// Note that prev_log_number() is no longer used, but we pay
|
|
// attention to it in case we are recovering a database
|
|
// produced by an older version of rocksdb.
|
|
const uint64_t min_log = versions_->MinLogNumber();
|
|
const uint64_t prev_log = versions_->prev_log_number();
|
|
std::vector<std::string> filenames;
|
|
s = env_->GetChildren(db_options_.wal_dir, &filenames);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
std::vector<uint64_t> logs;
|
|
for (size_t i = 0; i < filenames.size(); i++) {
|
|
uint64_t number;
|
|
FileType type;
|
|
if (ParseFileName(filenames[i], &number, &type) && type == kLogFile) {
|
|
if (is_new_db) {
|
|
return Status::Corruption(
|
|
"While creating a new Db, wal_dir contains "
|
|
"existing log file: ",
|
|
filenames[i]);
|
|
} else if ((number >= min_log) || (number == prev_log)) {
|
|
logs.push_back(number);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (logs.size() > 0 && error_if_log_file_exist) {
|
|
return Status::Corruption(""
|
|
"The db was opened in readonly mode with error_if_log_file_exist"
|
|
"flag but a log file already exists");
|
|
}
|
|
|
|
if (!logs.empty()) {
|
|
// Recover in the order in which the logs were generated
|
|
std::sort(logs.begin(), logs.end());
|
|
s = RecoverLogFiles(logs, &max_sequence, read_only);
|
|
if (!s.ok()) {
|
|
// Clear memtables if recovery failed
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
cfd->CreateNewMemtable(*cfd->GetLatestMutableCFOptions(),
|
|
kMaxSequenceNumber);
|
|
}
|
|
}
|
|
}
|
|
SetTickerCount(stats_, SEQUENCE_NUMBER, versions_->LastSequence());
|
|
}
|
|
|
|
// Initial value
|
|
max_total_in_memory_state_ = 0;
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
auto* mutable_cf_options = cfd->GetLatestMutableCFOptions();
|
|
max_total_in_memory_state_ += mutable_cf_options->write_buffer_size *
|
|
mutable_cf_options->max_write_buffer_number;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
// REQUIRES: log_numbers are sorted in ascending order
|
|
Status DBImpl::RecoverLogFiles(const std::vector<uint64_t>& log_numbers,
|
|
SequenceNumber* max_sequence, bool read_only) {
|
|
struct LogReporter : public log::Reader::Reporter {
|
|
Env* env;
|
|
Logger* info_log;
|
|
const char* fname;
|
|
Status* status; // nullptr if db_options_.paranoid_checks==false
|
|
virtual void Corruption(size_t bytes, const Status& s) override {
|
|
Log(InfoLogLevel::WARN_LEVEL,
|
|
info_log, "%s%s: dropping %d bytes; %s",
|
|
(this->status == nullptr ? "(ignoring error) " : ""),
|
|
fname, static_cast<int>(bytes), s.ToString().c_str());
|
|
if (this->status != nullptr && this->status->ok()) {
|
|
*this->status = s;
|
|
}
|
|
}
|
|
};
|
|
|
|
mutex_.AssertHeld();
|
|
Status status;
|
|
std::unordered_map<int, VersionEdit> version_edits;
|
|
// no need to refcount because iteration is under mutex
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
VersionEdit edit;
|
|
edit.SetColumnFamily(cfd->GetID());
|
|
version_edits.insert({cfd->GetID(), edit});
|
|
}
|
|
int job_id = next_job_id_.fetch_add(1);
|
|
{
|
|
auto stream = event_logger_.Log();
|
|
stream << "job" << job_id << "event"
|
|
<< "recovery_started";
|
|
stream << "log_files";
|
|
stream.StartArray();
|
|
for (auto log_number : log_numbers) {
|
|
stream << log_number;
|
|
}
|
|
stream.EndArray();
|
|
}
|
|
|
|
bool continue_replay_log = true;
|
|
for (auto log_number : log_numbers) {
|
|
// The previous incarnation may not have written any MANIFEST
|
|
// records after allocating this log number. So we manually
|
|
// update the file number allocation counter in VersionSet.
|
|
versions_->MarkFileNumberUsedDuringRecovery(log_number);
|
|
// Open the log file
|
|
std::string fname = LogFileName(db_options_.wal_dir, log_number);
|
|
unique_ptr<SequentialFile> file;
|
|
status = env_->NewSequentialFile(fname, &file, env_options_);
|
|
if (!status.ok()) {
|
|
MaybeIgnoreError(&status);
|
|
if (!status.ok()) {
|
|
return status;
|
|
} else {
|
|
// Fail with one log file, but that's ok.
|
|
// Try next one.
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// Create the log reader.
|
|
LogReporter reporter;
|
|
reporter.env = env_;
|
|
reporter.info_log = db_options_.info_log.get();
|
|
reporter.fname = fname.c_str();
|
|
if (!db_options_.paranoid_checks ||
|
|
db_options_.wal_recovery_mode ==
|
|
WALRecoveryMode::kSkipAnyCorruptedRecords) {
|
|
reporter.status = nullptr;
|
|
} else {
|
|
reporter.status = &status;
|
|
}
|
|
// We intentially make log::Reader do checksumming even if
|
|
// paranoid_checks==false so that corruptions cause entire commits
|
|
// to be skipped instead of propagating bad information (like overly
|
|
// large sequence numbers).
|
|
log::Reader reader(std::move(file), &reporter, true /*checksum*/,
|
|
0 /*initial_offset*/);
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"Recovering log #%" PRIu64 " mode %d skip-recovery %d", log_number,
|
|
db_options_.wal_recovery_mode, !continue_replay_log);
|
|
|
|
// Determine if we should tolerate incomplete records at the tail end of the
|
|
// log
|
|
bool report_eof_inconsistency;
|
|
if (db_options_.wal_recovery_mode ==
|
|
WALRecoveryMode::kAbsoluteConsistency) {
|
|
// in clean shutdown we don't expect any error in the log files
|
|
report_eof_inconsistency = true;
|
|
} else {
|
|
// for other modes ignore only incomplete records in the last log file
|
|
// which is presumably due to write in progress during restart
|
|
report_eof_inconsistency = false;
|
|
|
|
// TODO krad: Evaluate if we need to move to a more strict mode where we
|
|
// restrict the inconsistency to only the last log
|
|
}
|
|
|
|
// Read all the records and add to a memtable
|
|
std::string scratch;
|
|
Slice record;
|
|
WriteBatch batch;
|
|
|
|
if (!continue_replay_log) {
|
|
uint64_t bytes;
|
|
if (env_->GetFileSize(fname, &bytes).ok()) {
|
|
auto info_log = db_options_.info_log.get();
|
|
Log(InfoLogLevel::WARN_LEVEL, info_log, "%s: dropping %d bytes",
|
|
fname.c_str(), static_cast<int>(bytes));
|
|
}
|
|
}
|
|
|
|
while (continue_replay_log &&
|
|
reader.ReadRecord(&record, &scratch, report_eof_inconsistency) &&
|
|
status.ok()) {
|
|
if (record.size() < 12) {
|
|
reporter.Corruption(record.size(),
|
|
Status::Corruption("log record too small"));
|
|
continue;
|
|
}
|
|
WriteBatchInternal::SetContents(&batch, record);
|
|
|
|
// If column family was not found, it might mean that the WAL write
|
|
// batch references to the column family that was dropped after the
|
|
// insert. We don't want to fail the whole write batch in that case --
|
|
// we just ignore the update.
|
|
// That's why we set ignore missing column families to true
|
|
status = WriteBatchInternal::InsertInto(
|
|
&batch, column_family_memtables_.get(), true, log_number);
|
|
|
|
MaybeIgnoreError(&status);
|
|
if (!status.ok()) {
|
|
return status;
|
|
}
|
|
const SequenceNumber last_seq = WriteBatchInternal::Sequence(&batch) +
|
|
WriteBatchInternal::Count(&batch) - 1;
|
|
if ((*max_sequence == kMaxSequenceNumber) || (last_seq > *max_sequence)) {
|
|
*max_sequence = last_seq;
|
|
}
|
|
|
|
if (!read_only) {
|
|
// we can do this because this is called before client has access to the
|
|
// DB and there is only a single thread operating on DB
|
|
ColumnFamilyData* cfd;
|
|
|
|
while ((cfd = flush_scheduler_.GetNextColumnFamily()) != nullptr) {
|
|
cfd->Unref();
|
|
// If this asserts, it means that InsertInto failed in
|
|
// filtering updates to already-flushed column families
|
|
assert(cfd->GetLogNumber() <= log_number);
|
|
auto iter = version_edits.find(cfd->GetID());
|
|
assert(iter != version_edits.end());
|
|
VersionEdit* edit = &iter->second;
|
|
status = WriteLevel0TableForRecovery(job_id, cfd, cfd->mem(), edit);
|
|
if (!status.ok()) {
|
|
// Reflect errors immediately so that conditions like full
|
|
// file-systems cause the DB::Open() to fail.
|
|
return status;
|
|
}
|
|
|
|
cfd->CreateNewMemtable(*cfd->GetLatestMutableCFOptions(),
|
|
*max_sequence);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!status.ok()) {
|
|
// The hook function is designed to ignore all IO errors from reader
|
|
// during recovery for kSkipAnyCorruptedRecords. Status variable is
|
|
// unmodified by the reader.
|
|
assert(db_options_.wal_recovery_mode !=
|
|
WALRecoveryMode::kSkipAnyCorruptedRecords);
|
|
if (db_options_.wal_recovery_mode ==
|
|
WALRecoveryMode::kPointInTimeRecovery) {
|
|
// We should ignore the error but not continue replaying
|
|
status = Status::OK();
|
|
continue_replay_log = false;
|
|
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"Point in time recovered to log #%" PRIu64 " seq #%" PRIu64,
|
|
log_number, *max_sequence);
|
|
} else if (db_options_.wal_recovery_mode !=
|
|
WALRecoveryMode::kSkipAnyCorruptedRecords) {
|
|
return status;
|
|
}
|
|
}
|
|
|
|
flush_scheduler_.Clear();
|
|
if ((*max_sequence != kMaxSequenceNumber) &&
|
|
(versions_->LastSequence() < *max_sequence)) {
|
|
versions_->SetLastSequence(*max_sequence);
|
|
}
|
|
}
|
|
|
|
if (!read_only) {
|
|
// no need to refcount since client still doesn't have access
|
|
// to the DB and can not drop column families while we iterate
|
|
auto max_log_number = log_numbers.back();
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
auto iter = version_edits.find(cfd->GetID());
|
|
assert(iter != version_edits.end());
|
|
VersionEdit* edit = &iter->second;
|
|
|
|
if (cfd->GetLogNumber() > max_log_number) {
|
|
// Column family cfd has already flushed the data
|
|
// from all logs. Memtable has to be empty because
|
|
// we filter the updates based on log_number
|
|
// (in WriteBatch::InsertInto)
|
|
assert(cfd->mem()->GetFirstSequenceNumber() == 0);
|
|
assert(edit->NumEntries() == 0);
|
|
continue;
|
|
}
|
|
|
|
// flush the final memtable (if non-empty)
|
|
if (cfd->mem()->GetFirstSequenceNumber() != 0) {
|
|
status = WriteLevel0TableForRecovery(job_id, cfd, cfd->mem(), edit);
|
|
if (!status.ok()) {
|
|
// Recovery failed
|
|
break;
|
|
}
|
|
|
|
cfd->CreateNewMemtable(*cfd->GetLatestMutableCFOptions(),
|
|
*max_sequence);
|
|
}
|
|
|
|
// write MANIFEST with update
|
|
// writing log_number in the manifest means that any log file
|
|
// with number strongly less than (log_number + 1) is already
|
|
// recovered and should be ignored on next reincarnation.
|
|
// Since we already recovered max_log_number, we want all logs
|
|
// with numbers `<= max_log_number` (includes this one) to be ignored
|
|
edit->SetLogNumber(max_log_number + 1);
|
|
// we must mark the next log number as used, even though it's
|
|
// not actually used. that is because VersionSet assumes
|
|
// VersionSet::next_file_number_ always to be strictly greater than any
|
|
// log number
|
|
versions_->MarkFileNumberUsedDuringRecovery(max_log_number + 1);
|
|
status = versions_->LogAndApply(
|
|
cfd, *cfd->GetLatestMutableCFOptions(), edit, &mutex_);
|
|
if (!status.ok()) {
|
|
// Recovery failed
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
event_logger_.Log() << "job" << job_id << "event"
|
|
<< "recovery_finished";
|
|
|
|
return status;
|
|
}
|
|
|
|
Status DBImpl::WriteLevel0TableForRecovery(int job_id, ColumnFamilyData* cfd,
|
|
MemTable* mem, VersionEdit* edit) {
|
|
mutex_.AssertHeld();
|
|
const uint64_t start_micros = env_->NowMicros();
|
|
FileMetaData meta;
|
|
meta.fd = FileDescriptor(versions_->NewFileNumber(), 0, 0);
|
|
auto pending_outputs_inserted_elem =
|
|
CaptureCurrentFileNumberInPendingOutputs();
|
|
ReadOptions ro;
|
|
ro.total_order_seek = true;
|
|
Arena arena;
|
|
Status s;
|
|
TableProperties table_properties;
|
|
{
|
|
ScopedArenaIterator iter(mem->NewIterator(ro, &arena));
|
|
const SequenceNumber newest_snapshot = snapshots_.GetNewest();
|
|
const SequenceNumber earliest_seqno_in_memtable =
|
|
mem->GetFirstSequenceNumber();
|
|
Log(InfoLogLevel::DEBUG_LEVEL, db_options_.info_log,
|
|
"[%s] [WriteLevel0TableForRecovery]"
|
|
" Level-0 table #%" PRIu64 ": started",
|
|
cfd->GetName().c_str(), meta.fd.GetNumber());
|
|
|
|
bool paranoid_file_checks =
|
|
cfd->GetLatestMutableCFOptions()->paranoid_file_checks;
|
|
{
|
|
mutex_.Unlock();
|
|
TableFileCreationInfo info;
|
|
s = BuildTable(
|
|
dbname_, env_, *cfd->ioptions(), env_options_, cfd->table_cache(),
|
|
iter.get(), &meta, cfd->internal_comparator(),
|
|
cfd->int_tbl_prop_collector_factories(), newest_snapshot,
|
|
earliest_seqno_in_memtable, GetCompressionFlush(*cfd->ioptions()),
|
|
cfd->ioptions()->compression_opts, paranoid_file_checks, Env::IO_HIGH,
|
|
&info.table_properties);
|
|
LogFlush(db_options_.info_log);
|
|
Log(InfoLogLevel::DEBUG_LEVEL, db_options_.info_log,
|
|
"[%s] [WriteLevel0TableForRecovery]"
|
|
" Level-0 table #%" PRIu64 ": %" PRIu64 " bytes %s",
|
|
cfd->GetName().c_str(), meta.fd.GetNumber(), meta.fd.GetFileSize(),
|
|
s.ToString().c_str());
|
|
|
|
// output to event logger
|
|
if (s.ok()) {
|
|
info.db_name = dbname_;
|
|
info.cf_name = cfd->GetName();
|
|
info.file_path = TableFileName(db_options_.db_paths,
|
|
meta.fd.GetNumber(),
|
|
meta.fd.GetPathId());
|
|
info.file_size = meta.fd.GetFileSize();
|
|
info.job_id = job_id;
|
|
EventHelpers::LogAndNotifyTableFileCreation(
|
|
&event_logger_, db_options_.listeners, meta.fd, info);
|
|
}
|
|
mutex_.Lock();
|
|
}
|
|
}
|
|
ReleaseFileNumberFromPendingOutputs(pending_outputs_inserted_elem);
|
|
|
|
// Note that if file_size is zero, the file has been deleted and
|
|
// should not be added to the manifest.
|
|
int level = 0;
|
|
if (s.ok() && meta.fd.GetFileSize() > 0) {
|
|
edit->AddFile(level, meta.fd.GetNumber(), meta.fd.GetPathId(),
|
|
meta.fd.GetFileSize(), meta.smallest, meta.largest,
|
|
meta.smallest_seqno, meta.largest_seqno,
|
|
meta.marked_for_compaction);
|
|
}
|
|
|
|
InternalStats::CompactionStats stats(1);
|
|
stats.micros = env_->NowMicros() - start_micros;
|
|
stats.bytes_written = meta.fd.GetFileSize();
|
|
stats.num_output_files = 1;
|
|
cfd->internal_stats()->AddCompactionStats(level, stats);
|
|
cfd->internal_stats()->AddCFStats(
|
|
InternalStats::BYTES_FLUSHED, meta.fd.GetFileSize());
|
|
RecordTick(stats_, COMPACT_WRITE_BYTES, meta.fd.GetFileSize());
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::FlushMemTableToOutputFile(
|
|
ColumnFamilyData* cfd, const MutableCFOptions& mutable_cf_options,
|
|
bool* madeProgress, JobContext* job_context, LogBuffer* log_buffer) {
|
|
mutex_.AssertHeld();
|
|
assert(cfd->imm()->NumNotFlushed() != 0);
|
|
assert(cfd->imm()->IsFlushPending());
|
|
|
|
FlushJob flush_job(dbname_, cfd, db_options_, mutable_cf_options,
|
|
env_options_, versions_.get(), &mutex_, &shutting_down_,
|
|
snapshots_.GetNewest(), job_context, log_buffer,
|
|
directories_.GetDbDir(), directories_.GetDataDir(0U),
|
|
GetCompressionFlush(*cfd->ioptions()), stats_,
|
|
&event_logger_);
|
|
|
|
FileMetaData file_meta;
|
|
|
|
// Within flush_job.Run, rocksdb may call event listener to notify
|
|
// file creation and deletion.
|
|
//
|
|
// Note that flush_job.Run will unlock and lock the db_mutex,
|
|
// and EventListener callback will be called when the db_mutex
|
|
// is unlocked by the current thread.
|
|
Status s = flush_job.Run(&file_meta);
|
|
|
|
if (s.ok()) {
|
|
InstallSuperVersionAndScheduleWorkWrapper(cfd, job_context,
|
|
mutable_cf_options);
|
|
if (madeProgress) {
|
|
*madeProgress = 1;
|
|
}
|
|
VersionStorageInfo::LevelSummaryStorage tmp;
|
|
LogToBuffer(log_buffer, "[%s] Level summary: %s\n", cfd->GetName().c_str(),
|
|
cfd->current()->storage_info()->LevelSummary(&tmp));
|
|
}
|
|
|
|
if (!s.ok() && !s.IsShutdownInProgress() && db_options_.paranoid_checks &&
|
|
bg_error_.ok()) {
|
|
// if a bad error happened (not ShutdownInProgress) and paranoid_checks is
|
|
// true, mark DB read-only
|
|
bg_error_ = s;
|
|
}
|
|
RecordFlushIOStats();
|
|
#ifndef ROCKSDB_LITE
|
|
if (s.ok()) {
|
|
// may temporarily unlock and lock the mutex.
|
|
NotifyOnFlushCompleted(cfd, &file_meta, mutable_cf_options,
|
|
job_context->job_id);
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
return s;
|
|
}
|
|
|
|
void DBImpl::NotifyOnFlushCompleted(
|
|
ColumnFamilyData* cfd, FileMetaData* file_meta,
|
|
const MutableCFOptions& mutable_cf_options, int job_id) {
|
|
#ifndef ROCKSDB_LITE
|
|
if (db_options_.listeners.size() == 0U) {
|
|
return;
|
|
}
|
|
mutex_.AssertHeld();
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
return;
|
|
}
|
|
bool triggered_writes_slowdown =
|
|
(cfd->current()->storage_info()->NumLevelFiles(0) >=
|
|
mutable_cf_options.level0_slowdown_writes_trigger);
|
|
bool triggered_writes_stop =
|
|
(cfd->current()->storage_info()->NumLevelFiles(0) >=
|
|
mutable_cf_options.level0_stop_writes_trigger);
|
|
// release lock while notifying events
|
|
mutex_.Unlock();
|
|
{
|
|
FlushJobInfo info;
|
|
info.cf_name = cfd->GetName();
|
|
// TODO(yhchiang): make db_paths dynamic in case flush does not
|
|
// go to L0 in the future.
|
|
info.file_path = MakeTableFileName(db_options_.db_paths[0].path,
|
|
file_meta->fd.GetNumber());
|
|
info.thread_id = env_->GetThreadID();
|
|
info.job_id = job_id;
|
|
info.triggered_writes_slowdown = triggered_writes_slowdown;
|
|
info.triggered_writes_stop = triggered_writes_stop;
|
|
info.smallest_seqno = file_meta->smallest_seqno;
|
|
info.largest_seqno = file_meta->largest_seqno;
|
|
for (auto listener : db_options_.listeners) {
|
|
listener->OnFlushCompleted(this, info);
|
|
}
|
|
}
|
|
mutex_.Lock();
|
|
// no need to signal bg_cv_ as it will be signaled at the end of the
|
|
// flush process.
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
Status DBImpl::CompactRange(const CompactRangeOptions& options,
|
|
ColumnFamilyHandle* column_family,
|
|
const Slice* begin, const Slice* end) {
|
|
if (options.target_path_id >= db_options_.db_paths.size()) {
|
|
return Status::InvalidArgument("Invalid target path ID");
|
|
}
|
|
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
|
|
Status s = FlushMemTable(cfd, FlushOptions());
|
|
if (!s.ok()) {
|
|
LogFlush(db_options_.info_log);
|
|
return s;
|
|
}
|
|
|
|
int max_level_with_files = 0;
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
Version* base = cfd->current();
|
|
for (int level = 1; level < base->storage_info()->num_non_empty_levels();
|
|
level++) {
|
|
if (base->storage_info()->OverlapInLevel(level, begin, end)) {
|
|
max_level_with_files = level;
|
|
}
|
|
}
|
|
}
|
|
|
|
int final_output_level = 0;
|
|
if (cfd->ioptions()->compaction_style == kCompactionStyleUniversal &&
|
|
cfd->NumberLevels() > 1) {
|
|
// Always compact all files together.
|
|
s = RunManualCompaction(cfd, ColumnFamilyData::kCompactAllLevels,
|
|
cfd->NumberLevels() - 1, options.target_path_id,
|
|
begin, end);
|
|
final_output_level = cfd->NumberLevels() - 1;
|
|
} else {
|
|
for (int level = 0; level <= max_level_with_files; level++) {
|
|
int output_level;
|
|
// in case the compaction is unversal or if we're compacting the
|
|
// bottom-most level, the output level will be the same as input one.
|
|
// level 0 can never be the bottommost level (i.e. if all files are in
|
|
// level 0, we will compact to level 1)
|
|
if (cfd->ioptions()->compaction_style == kCompactionStyleUniversal ||
|
|
cfd->ioptions()->compaction_style == kCompactionStyleFIFO) {
|
|
output_level = level;
|
|
} else if (level == max_level_with_files && level > 0) {
|
|
if (options.bottommost_level_compaction ==
|
|
BottommostLevelCompaction::kSkip) {
|
|
// Skip bottommost level compaction
|
|
continue;
|
|
} else if (options.bottommost_level_compaction ==
|
|
BottommostLevelCompaction::kIfHaveCompactionFilter &&
|
|
cfd->ioptions()->compaction_filter == nullptr &&
|
|
cfd->ioptions()->compaction_filter_factory == nullptr &&
|
|
cfd->ioptions()->compaction_filter_factory_v2 == nullptr) {
|
|
// Skip bottommost level compaction since we dont have
|
|
// compaction filter
|
|
continue;
|
|
}
|
|
output_level = level;
|
|
} else {
|
|
output_level = level + 1;
|
|
if (cfd->ioptions()->compaction_style == kCompactionStyleLevel &&
|
|
cfd->ioptions()->level_compaction_dynamic_level_bytes &&
|
|
level == 0) {
|
|
output_level = ColumnFamilyData::kCompactToBaseLevel;
|
|
}
|
|
}
|
|
s = RunManualCompaction(cfd, level, output_level, options.target_path_id,
|
|
begin, end);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
if (output_level == ColumnFamilyData::kCompactToBaseLevel) {
|
|
final_output_level = cfd->NumberLevels() - 1;
|
|
} else if (output_level > final_output_level) {
|
|
final_output_level = output_level;
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::RunManualCompaction()::1");
|
|
TEST_SYNC_POINT("DBImpl::RunManualCompaction()::2");
|
|
}
|
|
}
|
|
if (!s.ok()) {
|
|
LogFlush(db_options_.info_log);
|
|
return s;
|
|
}
|
|
|
|
if (options.change_level) {
|
|
s = ReFitLevel(cfd, final_output_level, options.target_level);
|
|
}
|
|
LogFlush(db_options_.info_log);
|
|
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
// an automatic compaction that has been scheduled might have been
|
|
// preempted by the manual compactions. Need to schedule it back.
|
|
MaybeScheduleFlushOrCompaction();
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::CompactFiles(
|
|
const CompactionOptions& compact_options,
|
|
ColumnFamilyHandle* column_family,
|
|
const std::vector<std::string>& input_file_names,
|
|
const int output_level, const int output_path_id) {
|
|
#ifdef ROCKSDB_LITE
|
|
// not supported in lite version
|
|
return Status::NotSupported("Not supported in ROCKSDB LITE");
|
|
#else
|
|
if (column_family == nullptr) {
|
|
return Status::InvalidArgument("ColumnFamilyHandle must be non-null.");
|
|
}
|
|
|
|
auto cfd = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family)->cfd();
|
|
assert(cfd);
|
|
|
|
Status s;
|
|
JobContext job_context(0, true);
|
|
LogBuffer log_buffer(InfoLogLevel::INFO_LEVEL,
|
|
db_options_.info_log.get());
|
|
|
|
// Perform CompactFiles
|
|
SuperVersion* sv = GetAndRefSuperVersion(cfd);
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
|
|
s = CompactFilesImpl(compact_options, cfd, sv->current,
|
|
input_file_names, output_level,
|
|
output_path_id, &job_context, &log_buffer);
|
|
}
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
|
|
// Find and delete obsolete files
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
// If !s.ok(), this means that Compaction failed. In that case, we want
|
|
// to delete all obsolete files we might have created and we force
|
|
// FindObsoleteFiles(). This is because job_context does not
|
|
// catch all created files if compaction failed.
|
|
FindObsoleteFiles(&job_context, !s.ok());
|
|
} // release the mutex
|
|
|
|
// delete unnecessary files if any, this is done outside the mutex
|
|
if (job_context.HaveSomethingToDelete() || !log_buffer.IsEmpty()) {
|
|
// Have to flush the info logs before bg_compaction_scheduled_--
|
|
// because if bg_flush_scheduled_ becomes 0 and the lock is
|
|
// released, the deconstructor of DB can kick in and destroy all the
|
|
// states of DB so info_log might not be available after that point.
|
|
// It also applies to access other states that DB owns.
|
|
log_buffer.FlushBufferToLog();
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
// no mutex is locked here. No need to Unlock() and Lock() here.
|
|
PurgeObsoleteFiles(job_context);
|
|
}
|
|
job_context.Clean();
|
|
}
|
|
|
|
return s;
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
Status DBImpl::CompactFilesImpl(
|
|
const CompactionOptions& compact_options, ColumnFamilyData* cfd,
|
|
Version* version, const std::vector<std::string>& input_file_names,
|
|
const int output_level, int output_path_id, JobContext* job_context,
|
|
LogBuffer* log_buffer) {
|
|
mutex_.AssertHeld();
|
|
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
return Status::ShutdownInProgress();
|
|
}
|
|
|
|
std::unordered_set<uint64_t> input_set;
|
|
for (auto file_name : input_file_names) {
|
|
input_set.insert(TableFileNameToNumber(file_name));
|
|
}
|
|
|
|
ColumnFamilyMetaData cf_meta;
|
|
// TODO(yhchiang): can directly use version here if none of the
|
|
// following functions call is pluggable to external developers.
|
|
version->GetColumnFamilyMetaData(&cf_meta);
|
|
|
|
if (output_path_id < 0) {
|
|
if (db_options_.db_paths.size() == 1U) {
|
|
output_path_id = 0;
|
|
} else {
|
|
return Status::NotSupported(
|
|
"Automatic output path selection is not "
|
|
"yet supported in CompactFiles()");
|
|
}
|
|
}
|
|
|
|
Status s = cfd->compaction_picker()->SanitizeCompactionInputFiles(
|
|
&input_set, cf_meta, output_level);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
std::vector<CompactionInputFiles> input_files;
|
|
s = cfd->compaction_picker()->GetCompactionInputsFromFileNumbers(
|
|
&input_files, &input_set, version->storage_info(), compact_options);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
for (auto inputs : input_files) {
|
|
if (cfd->compaction_picker()->FilesInCompaction(inputs.files)) {
|
|
return Status::Aborted(
|
|
"Some of the necessary compaction input "
|
|
"files are already being compacted");
|
|
}
|
|
}
|
|
|
|
// At this point, CompactFiles will be run.
|
|
bg_compaction_scheduled_++;
|
|
|
|
unique_ptr<Compaction> c;
|
|
assert(cfd->compaction_picker());
|
|
c.reset(cfd->compaction_picker()->FormCompaction(
|
|
compact_options, input_files, output_level, version->storage_info(),
|
|
*cfd->GetLatestMutableCFOptions(), output_path_id));
|
|
assert(c);
|
|
c->SetInputVersion(version);
|
|
// deletion compaction currently not allowed in CompactFiles.
|
|
assert(!c->IsDeletionCompaction());
|
|
|
|
auto yield_callback = [&]() {
|
|
return CallFlushDuringCompaction(
|
|
c->column_family_data(), *c->mutable_cf_options(),
|
|
job_context, log_buffer);
|
|
};
|
|
assert(is_snapshot_supported_ || snapshots_.empty());
|
|
CompactionJob compaction_job(
|
|
job_context->job_id, c.get(), db_options_, env_options_, versions_.get(),
|
|
&shutting_down_, log_buffer, directories_.GetDbDir(),
|
|
directories_.GetDataDir(c->GetOutputPathId()), stats_,
|
|
snapshots_.GetAll(), table_cache_, std::move(yield_callback),
|
|
&event_logger_, c->mutable_cf_options()->paranoid_file_checks, dbname_,
|
|
nullptr); // Here we pass a nullptr for CompactionJobStats because
|
|
// CompactFiles does not trigger OnCompactionCompleted(),
|
|
// which is the only place where CompactionJobStats is
|
|
// returned. The idea of not triggering OnCompationCompleted()
|
|
// is that CompactFiles runs in the caller thread, so the user
|
|
// should always know when it completes. As a result, it makes
|
|
// less sense to notify the users something they should already
|
|
// know.
|
|
//
|
|
// In the future, if we would like to add CompactionJobStats
|
|
// support for CompactFiles, we should have CompactFiles API
|
|
// pass a pointer of CompactionJobStats as the out-value
|
|
// instead of using EventListener.
|
|
compaction_job.Prepare();
|
|
|
|
mutex_.Unlock();
|
|
Status status = compaction_job.Run();
|
|
mutex_.Lock();
|
|
|
|
compaction_job.Install(&status, *c->mutable_cf_options(), &mutex_);
|
|
if (status.ok()) {
|
|
InstallSuperVersionAndScheduleWorkWrapper(
|
|
c->column_family_data(), job_context, *c->mutable_cf_options());
|
|
}
|
|
c->ReleaseCompactionFiles(s);
|
|
c.reset();
|
|
|
|
if (status.ok()) {
|
|
// Done
|
|
} else if (status.IsShutdownInProgress()) {
|
|
// Ignore compaction errors found during shutting down
|
|
} else {
|
|
Log(InfoLogLevel::WARN_LEVEL, db_options_.info_log,
|
|
"[%s] [JOB %d] Compaction error: %s",
|
|
c->column_family_data()->GetName().c_str(), job_context->job_id,
|
|
status.ToString().c_str());
|
|
if (db_options_.paranoid_checks && bg_error_.ok()) {
|
|
bg_error_ = status;
|
|
}
|
|
}
|
|
|
|
bg_compaction_scheduled_--;
|
|
if (bg_compaction_scheduled_ == 0) {
|
|
bg_cv_.SignalAll();
|
|
}
|
|
|
|
return status;
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
void DBImpl::NotifyOnCompactionCompleted(
|
|
ColumnFamilyData* cfd, Compaction *c, const Status &st,
|
|
const CompactionJobStats& compaction_job_stats,
|
|
const int job_id) {
|
|
#ifndef ROCKSDB_LITE
|
|
if (db_options_.listeners.size() == 0U) {
|
|
return;
|
|
}
|
|
mutex_.AssertHeld();
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
return;
|
|
}
|
|
// release lock while notifying events
|
|
mutex_.Unlock();
|
|
{
|
|
CompactionJobInfo info;
|
|
info.cf_name = cfd->GetName();
|
|
info.status = st;
|
|
info.thread_id = env_->GetThreadID();
|
|
info.job_id = job_id;
|
|
info.base_input_level = c->start_level();
|
|
info.output_level = c->output_level();
|
|
info.stats = compaction_job_stats;
|
|
for (size_t i = 0; i < c->num_input_levels(); ++i) {
|
|
for (const auto fmd : *c->inputs(i)) {
|
|
info.input_files.push_back(
|
|
TableFileName(db_options_.db_paths,
|
|
fmd->fd.GetNumber(),
|
|
fmd->fd.GetPathId()));
|
|
}
|
|
}
|
|
for (const auto newf : c->edit()->GetNewFiles()) {
|
|
info.output_files.push_back(
|
|
TableFileName(db_options_.db_paths,
|
|
newf.second.fd.GetNumber(),
|
|
newf.second.fd.GetPathId()));
|
|
}
|
|
for (auto listener : db_options_.listeners) {
|
|
listener->OnCompactionCompleted(this, info);
|
|
}
|
|
}
|
|
mutex_.Lock();
|
|
// no need to signal bg_cv_ as it will be signaled at the end of the
|
|
// flush process.
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
Status DBImpl::SetOptions(ColumnFamilyHandle* column_family,
|
|
const std::unordered_map<std::string, std::string>& options_map) {
|
|
#ifdef ROCKSDB_LITE
|
|
return Status::NotSupported("Not supported in ROCKSDB LITE");
|
|
#else
|
|
auto* cfd = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family)->cfd();
|
|
if (options_map.empty()) {
|
|
Log(InfoLogLevel::WARN_LEVEL,
|
|
db_options_.info_log, "SetOptions() on column family [%s], empty input",
|
|
cfd->GetName().c_str());
|
|
return Status::InvalidArgument("empty input");
|
|
}
|
|
|
|
MutableCFOptions new_options;
|
|
Status s;
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
s = cfd->SetOptions(options_map);
|
|
if (s.ok()) {
|
|
new_options = *cfd->GetLatestMutableCFOptions();
|
|
}
|
|
}
|
|
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"SetOptions() on column family [%s], inputs:",
|
|
cfd->GetName().c_str());
|
|
for (const auto& o : options_map) {
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"%s: %s\n", o.first.c_str(), o.second.c_str());
|
|
}
|
|
if (s.ok()) {
|
|
Log(InfoLogLevel::INFO_LEVEL,
|
|
db_options_.info_log, "[%s] SetOptions succeeded",
|
|
cfd->GetName().c_str());
|
|
new_options.Dump(db_options_.info_log.get());
|
|
} else {
|
|
Log(InfoLogLevel::WARN_LEVEL, db_options_.info_log,
|
|
"[%s] SetOptions failed", cfd->GetName().c_str());
|
|
}
|
|
LogFlush(db_options_.info_log);
|
|
return s;
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
// return the same level if it cannot be moved
|
|
int DBImpl::FindMinimumEmptyLevelFitting(ColumnFamilyData* cfd,
|
|
const MutableCFOptions& mutable_cf_options, int level) {
|
|
mutex_.AssertHeld();
|
|
const auto* vstorage = cfd->current()->storage_info();
|
|
int minimum_level = level;
|
|
for (int i = level - 1; i > 0; --i) {
|
|
// stop if level i is not empty
|
|
if (vstorage->NumLevelFiles(i) > 0) break;
|
|
// stop if level i is too small (cannot fit the level files)
|
|
if (vstorage->MaxBytesForLevel(i) < vstorage->NumLevelBytes(level)) {
|
|
break;
|
|
}
|
|
|
|
minimum_level = i;
|
|
}
|
|
return minimum_level;
|
|
}
|
|
|
|
Status DBImpl::ReFitLevel(ColumnFamilyData* cfd, int level, int target_level) {
|
|
assert(level < cfd->NumberLevels());
|
|
if (target_level >= cfd->NumberLevels()) {
|
|
return Status::InvalidArgument("Target level exceeds number of levels");
|
|
}
|
|
|
|
SuperVersion* superversion_to_free = nullptr;
|
|
SuperVersion* new_superversion = new SuperVersion();
|
|
|
|
InstrumentedMutexLock guard_lock(&mutex_);
|
|
|
|
// only allow one thread refitting
|
|
if (refitting_level_) {
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"[ReFitLevel] another thread is refitting");
|
|
delete new_superversion;
|
|
return Status::NotSupported("another thread is refitting");
|
|
}
|
|
refitting_level_ = true;
|
|
|
|
// wait for all background threads to stop
|
|
bg_work_gate_closed_ = true;
|
|
while (bg_compaction_scheduled_ > 0 || bg_flush_scheduled_) {
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"[RefitLevel] waiting for background threads to stop: %d %d",
|
|
bg_compaction_scheduled_, bg_flush_scheduled_);
|
|
bg_cv_.Wait();
|
|
}
|
|
|
|
const MutableCFOptions mutable_cf_options =
|
|
*cfd->GetLatestMutableCFOptions();
|
|
// move to a smaller level
|
|
int to_level = target_level;
|
|
if (target_level < 0) {
|
|
to_level = FindMinimumEmptyLevelFitting(cfd, mutable_cf_options, level);
|
|
}
|
|
|
|
Status status;
|
|
auto* vstorage = cfd->current()->storage_info();
|
|
if (to_level > level) {
|
|
if (level == 0) {
|
|
delete new_superversion;
|
|
return Status::NotSupported(
|
|
"Cannot change from level 0 to other levels.");
|
|
}
|
|
// Check levels are empty for a trivial move
|
|
for (int l = level + 1; l <= to_level; l++) {
|
|
if (vstorage->NumLevelFiles(l) > 0) {
|
|
delete new_superversion;
|
|
return Status::NotSupported(
|
|
"Levels between source and target are not empty for a move.");
|
|
}
|
|
}
|
|
}
|
|
if (to_level != level) {
|
|
Log(InfoLogLevel::DEBUG_LEVEL, db_options_.info_log,
|
|
"[%s] Before refitting:\n%s",
|
|
cfd->GetName().c_str(), cfd->current()->DebugString().data());
|
|
|
|
VersionEdit edit;
|
|
edit.SetColumnFamily(cfd->GetID());
|
|
for (const auto& f : vstorage->LevelFiles(level)) {
|
|
edit.DeleteFile(level, f->fd.GetNumber());
|
|
edit.AddFile(to_level, f->fd.GetNumber(), f->fd.GetPathId(),
|
|
f->fd.GetFileSize(), f->smallest, f->largest,
|
|
f->smallest_seqno, f->largest_seqno,
|
|
f->marked_for_compaction);
|
|
}
|
|
Log(InfoLogLevel::DEBUG_LEVEL, db_options_.info_log,
|
|
"[%s] Apply version edit:\n%s",
|
|
cfd->GetName().c_str(), edit.DebugString().data());
|
|
|
|
status = versions_->LogAndApply(cfd, mutable_cf_options, &edit, &mutex_,
|
|
directories_.GetDbDir());
|
|
superversion_to_free = InstallSuperVersionAndScheduleWork(
|
|
cfd, new_superversion, mutable_cf_options);
|
|
new_superversion = nullptr;
|
|
|
|
Log(InfoLogLevel::DEBUG_LEVEL, db_options_.info_log,
|
|
"[%s] LogAndApply: %s\n", cfd->GetName().c_str(),
|
|
status.ToString().data());
|
|
|
|
if (status.ok()) {
|
|
Log(InfoLogLevel::DEBUG_LEVEL, db_options_.info_log,
|
|
"[%s] After refitting:\n%s",
|
|
cfd->GetName().c_str(), cfd->current()->DebugString().data());
|
|
}
|
|
}
|
|
|
|
refitting_level_ = false;
|
|
bg_work_gate_closed_ = false;
|
|
|
|
delete superversion_to_free;
|
|
delete new_superversion;
|
|
return status;
|
|
}
|
|
|
|
int DBImpl::NumberLevels(ColumnFamilyHandle* column_family) {
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
return cfh->cfd()->NumberLevels();
|
|
}
|
|
|
|
int DBImpl::MaxMemCompactionLevel(ColumnFamilyHandle* column_family) {
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
InstrumentedMutexLock l(&mutex_);
|
|
return cfh->cfd()->GetSuperVersion()->
|
|
mutable_cf_options.max_mem_compaction_level;
|
|
}
|
|
|
|
int DBImpl::Level0StopWriteTrigger(ColumnFamilyHandle* column_family) {
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
InstrumentedMutexLock l(&mutex_);
|
|
return cfh->cfd()->GetSuperVersion()->
|
|
mutable_cf_options.level0_stop_writes_trigger;
|
|
}
|
|
|
|
Status DBImpl::Flush(const FlushOptions& flush_options,
|
|
ColumnFamilyHandle* column_family) {
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
return FlushMemTable(cfh->cfd(), flush_options);
|
|
}
|
|
|
|
SequenceNumber DBImpl::GetLatestSequenceNumber() const {
|
|
return versions_->LastSequence();
|
|
}
|
|
|
|
Status DBImpl::RunManualCompaction(ColumnFamilyData* cfd, int input_level,
|
|
int output_level, uint32_t output_path_id,
|
|
const Slice* begin, const Slice* end,
|
|
bool disallow_trivial_move) {
|
|
assert(input_level == ColumnFamilyData::kCompactAllLevels ||
|
|
input_level >= 0);
|
|
|
|
InternalKey begin_storage, end_storage;
|
|
|
|
ManualCompaction manual;
|
|
manual.cfd = cfd;
|
|
manual.input_level = input_level;
|
|
manual.output_level = output_level;
|
|
manual.output_path_id = output_path_id;
|
|
manual.done = false;
|
|
manual.in_progress = false;
|
|
manual.disallow_trivial_move = disallow_trivial_move;
|
|
// For universal compaction, we enforce every manual compaction to compact
|
|
// all files.
|
|
if (begin == nullptr ||
|
|
cfd->ioptions()->compaction_style == kCompactionStyleUniversal ||
|
|
cfd->ioptions()->compaction_style == kCompactionStyleFIFO) {
|
|
manual.begin = nullptr;
|
|
} else {
|
|
begin_storage.SetMaxPossibleForUserKey(*begin);
|
|
manual.begin = &begin_storage;
|
|
}
|
|
if (end == nullptr ||
|
|
cfd->ioptions()->compaction_style == kCompactionStyleUniversal ||
|
|
cfd->ioptions()->compaction_style == kCompactionStyleFIFO) {
|
|
manual.end = nullptr;
|
|
} else {
|
|
end_storage.SetMinPossibleForUserKey(*end);
|
|
manual.end = &end_storage;
|
|
}
|
|
|
|
InstrumentedMutexLock l(&mutex_);
|
|
|
|
// When a manual compaction arrives, temporarily disable scheduling of
|
|
// non-manual compactions and wait until the number of scheduled compaction
|
|
// jobs drops to zero. This is needed to ensure that this manual compaction
|
|
// can compact any range of keys/files.
|
|
//
|
|
// bg_manual_only_ is non-zero when at least one thread is inside
|
|
// RunManualCompaction(), i.e. during that time no other compaction will
|
|
// get scheduled (see MaybeScheduleFlushOrCompaction).
|
|
//
|
|
// Note that the following loop doesn't stop more that one thread calling
|
|
// RunManualCompaction() from getting to the second while loop below.
|
|
// However, only one of them will actually schedule compaction, while
|
|
// others will wait on a condition variable until it completes.
|
|
|
|
++bg_manual_only_;
|
|
while (bg_compaction_scheduled_ > 0) {
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"[%s] Manual compaction waiting for all other scheduled background "
|
|
"compactions to finish",
|
|
cfd->GetName().c_str());
|
|
bg_cv_.Wait();
|
|
}
|
|
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"[%s] Manual compaction starting",
|
|
cfd->GetName().c_str());
|
|
|
|
// We don't check bg_error_ here, because if we get the error in compaction,
|
|
// the compaction will set manual.status to bg_error_ and set manual.done to
|
|
// true.
|
|
while (!manual.done) {
|
|
assert(bg_manual_only_ > 0);
|
|
if (manual_compaction_ != nullptr) {
|
|
// Running either this or some other manual compaction
|
|
bg_cv_.Wait();
|
|
} else {
|
|
manual_compaction_ = &manual;
|
|
bg_compaction_scheduled_++;
|
|
env_->Schedule(&DBImpl::BGWorkCompaction, this, Env::Priority::LOW, this);
|
|
}
|
|
}
|
|
|
|
assert(!manual.in_progress);
|
|
assert(bg_manual_only_ > 0);
|
|
--bg_manual_only_;
|
|
return manual.status;
|
|
}
|
|
|
|
Status DBImpl::FlushMemTable(ColumnFamilyData* cfd,
|
|
const FlushOptions& flush_options) {
|
|
Status s;
|
|
{
|
|
WriteContext context;
|
|
InstrumentedMutexLock guard_lock(&mutex_);
|
|
|
|
if (cfd->imm()->NumNotFlushed() == 0 && cfd->mem()->IsEmpty()) {
|
|
// Nothing to flush
|
|
return Status::OK();
|
|
}
|
|
|
|
WriteThread::Writer w(&mutex_);
|
|
s = write_thread_.EnterWriteThread(&w, 0);
|
|
assert(s.ok() && !w.done); // No timeout and nobody should do our job
|
|
|
|
// SwitchMemtable() will release and reacquire mutex
|
|
// during execution
|
|
s = SwitchMemtable(cfd, &context);
|
|
write_thread_.ExitWriteThread(&w, &w, s);
|
|
|
|
cfd->imm()->FlushRequested();
|
|
|
|
// schedule flush
|
|
SchedulePendingFlush(cfd);
|
|
MaybeScheduleFlushOrCompaction();
|
|
}
|
|
|
|
if (s.ok() && flush_options.wait) {
|
|
// Wait until the compaction completes
|
|
s = WaitForFlushMemTable(cfd);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::WaitForFlushMemTable(ColumnFamilyData* cfd) {
|
|
Status s;
|
|
// Wait until the compaction completes
|
|
InstrumentedMutexLock l(&mutex_);
|
|
while (cfd->imm()->NumNotFlushed() > 0 && bg_error_.ok()) {
|
|
if (shutting_down_.load(std::memory_order_acquire)) {
|
|
return Status::ShutdownInProgress();
|
|
}
|
|
bg_cv_.Wait();
|
|
}
|
|
if (!bg_error_.ok()) {
|
|
s = bg_error_;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
void DBImpl::MaybeScheduleFlushOrCompaction() {
|
|
mutex_.AssertHeld();
|
|
if (bg_work_gate_closed_) {
|
|
// gate closed for background work
|
|
return;
|
|
} else if (shutting_down_.load(std::memory_order_acquire)) {
|
|
// DB is being deleted; no more background compactions
|
|
return;
|
|
}
|
|
|
|
while (unscheduled_flushes_ > 0 &&
|
|
bg_flush_scheduled_ < db_options_.max_background_flushes) {
|
|
unscheduled_flushes_--;
|
|
bg_flush_scheduled_++;
|
|
env_->Schedule(&DBImpl::BGWorkFlush, this, Env::Priority::HIGH, this);
|
|
}
|
|
|
|
if (bg_manual_only_) {
|
|
// only manual compactions are allowed to run. don't schedule automatic
|
|
// compactions
|
|
return;
|
|
}
|
|
|
|
if (db_options_.max_background_flushes == 0 &&
|
|
bg_compaction_scheduled_ < db_options_.max_background_compactions &&
|
|
unscheduled_flushes_ > 0) {
|
|
// special case where flush is executed by compaction thread
|
|
// (if max_background_flushes == 0).
|
|
// Compaction thread will execute all the flushes
|
|
unscheduled_flushes_ = 0;
|
|
if (unscheduled_compactions_ > 0) {
|
|
// bg compaction will execute one compaction
|
|
unscheduled_compactions_--;
|
|
}
|
|
bg_compaction_scheduled_++;
|
|
env_->Schedule(&DBImpl::BGWorkCompaction, this, Env::Priority::LOW, this);
|
|
}
|
|
|
|
while (bg_compaction_scheduled_ < db_options_.max_background_compactions &&
|
|
unscheduled_compactions_ > 0) {
|
|
bg_compaction_scheduled_++;
|
|
unscheduled_compactions_--;
|
|
env_->Schedule(&DBImpl::BGWorkCompaction, this, Env::Priority::LOW, this);
|
|
}
|
|
}
|
|
|
|
void DBImpl::AddToCompactionQueue(ColumnFamilyData* cfd) {
|
|
assert(!cfd->pending_compaction());
|
|
cfd->Ref();
|
|
compaction_queue_.push_back(cfd);
|
|
cfd->set_pending_compaction(true);
|
|
}
|
|
|
|
ColumnFamilyData* DBImpl::PopFirstFromCompactionQueue() {
|
|
assert(!compaction_queue_.empty());
|
|
auto cfd = *compaction_queue_.begin();
|
|
compaction_queue_.pop_front();
|
|
assert(cfd->pending_compaction());
|
|
cfd->set_pending_compaction(false);
|
|
return cfd;
|
|
}
|
|
|
|
void DBImpl::AddToFlushQueue(ColumnFamilyData* cfd) {
|
|
assert(!cfd->pending_flush());
|
|
cfd->Ref();
|
|
flush_queue_.push_back(cfd);
|
|
cfd->set_pending_flush(true);
|
|
}
|
|
|
|
ColumnFamilyData* DBImpl::PopFirstFromFlushQueue() {
|
|
assert(!flush_queue_.empty());
|
|
auto cfd = *flush_queue_.begin();
|
|
flush_queue_.pop_front();
|
|
assert(cfd->pending_flush());
|
|
cfd->set_pending_flush(false);
|
|
return cfd;
|
|
}
|
|
|
|
void DBImpl::SchedulePendingFlush(ColumnFamilyData* cfd) {
|
|
if (!cfd->pending_flush() && cfd->imm()->IsFlushPending()) {
|
|
AddToFlushQueue(cfd);
|
|
++unscheduled_flushes_;
|
|
}
|
|
}
|
|
|
|
void DBImpl::SchedulePendingCompaction(ColumnFamilyData* cfd) {
|
|
if (!cfd->pending_compaction() && cfd->NeedsCompaction()) {
|
|
AddToCompactionQueue(cfd);
|
|
++unscheduled_compactions_;
|
|
}
|
|
}
|
|
|
|
void DBImpl::RecordFlushIOStats() {
|
|
RecordTick(stats_, FLUSH_WRITE_BYTES, IOSTATS(bytes_written));
|
|
IOSTATS_RESET(bytes_written);
|
|
}
|
|
|
|
void DBImpl::BGWorkFlush(void* db) {
|
|
IOSTATS_SET_THREAD_POOL_ID(Env::Priority::HIGH);
|
|
TEST_SYNC_POINT("DBImpl::BGWorkFlush");
|
|
reinterpret_cast<DBImpl*>(db)->BackgroundCallFlush();
|
|
TEST_SYNC_POINT("DBImpl::BGWorkFlush:done");
|
|
}
|
|
|
|
void DBImpl::BGWorkCompaction(void* db) {
|
|
IOSTATS_SET_THREAD_POOL_ID(Env::Priority::LOW);
|
|
TEST_SYNC_POINT("DBImpl::BGWorkCompaction");
|
|
reinterpret_cast<DBImpl*>(db)->BackgroundCallCompaction();
|
|
}
|
|
|
|
Status DBImpl::BackgroundFlush(bool* madeProgress, JobContext* job_context,
|
|
LogBuffer* log_buffer) {
|
|
mutex_.AssertHeld();
|
|
|
|
Status status = bg_error_;
|
|
if (status.ok() && shutting_down_.load(std::memory_order_acquire)) {
|
|
status = Status::ShutdownInProgress();
|
|
}
|
|
|
|
if (!status.ok()) {
|
|
return status;
|
|
}
|
|
|
|
ColumnFamilyData* cfd = nullptr;
|
|
while (!flush_queue_.empty()) {
|
|
// This cfd is already referenced
|
|
auto first_cfd = PopFirstFromFlushQueue();
|
|
|
|
if (first_cfd->IsDropped() || !first_cfd->imm()->IsFlushPending()) {
|
|
// can't flush this CF, try next one
|
|
if (first_cfd->Unref()) {
|
|
delete first_cfd;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
// found a flush!
|
|
cfd = first_cfd;
|
|
break;
|
|
}
|
|
|
|
if (cfd != nullptr) {
|
|
const MutableCFOptions mutable_cf_options =
|
|
*cfd->GetLatestMutableCFOptions();
|
|
LogToBuffer(
|
|
log_buffer,
|
|
"Calling FlushMemTableToOutputFile with column "
|
|
"family [%s], flush slots available %d, compaction slots available %d",
|
|
cfd->GetName().c_str(),
|
|
db_options_.max_background_flushes - bg_flush_scheduled_,
|
|
db_options_.max_background_compactions - bg_compaction_scheduled_);
|
|
status = FlushMemTableToOutputFile(cfd, mutable_cf_options, madeProgress,
|
|
job_context, log_buffer);
|
|
if (cfd->Unref()) {
|
|
delete cfd;
|
|
}
|
|
}
|
|
return status;
|
|
}
|
|
|
|
void DBImpl::BackgroundCallFlush() {
|
|
bool madeProgress = false;
|
|
JobContext job_context(next_job_id_.fetch_add(1), true);
|
|
assert(bg_flush_scheduled_);
|
|
|
|
LogBuffer log_buffer(InfoLogLevel::INFO_LEVEL, db_options_.info_log.get());
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
|
|
auto pending_outputs_inserted_elem =
|
|
CaptureCurrentFileNumberInPendingOutputs();
|
|
|
|
Status s = BackgroundFlush(&madeProgress, &job_context, &log_buffer);
|
|
if (!s.ok() && !s.IsShutdownInProgress()) {
|
|
// Wait a little bit before retrying background flush in
|
|
// case this is an environmental problem and we do not want to
|
|
// chew up resources for failed flushes for the duration of
|
|
// the problem.
|
|
uint64_t error_cnt =
|
|
default_cf_internal_stats_->BumpAndGetBackgroundErrorCount();
|
|
bg_cv_.SignalAll(); // In case a waiter can proceed despite the error
|
|
mutex_.Unlock();
|
|
Log(InfoLogLevel::ERROR_LEVEL, db_options_.info_log,
|
|
"Waiting after background flush error: %s"
|
|
"Accumulated background error counts: %" PRIu64,
|
|
s.ToString().c_str(), error_cnt);
|
|
log_buffer.FlushBufferToLog();
|
|
LogFlush(db_options_.info_log);
|
|
env_->SleepForMicroseconds(1000000);
|
|
mutex_.Lock();
|
|
}
|
|
|
|
ReleaseFileNumberFromPendingOutputs(pending_outputs_inserted_elem);
|
|
|
|
// If flush failed, we want to delete all temporary files that we might have
|
|
// created. Thus, we force full scan in FindObsoleteFiles()
|
|
FindObsoleteFiles(&job_context, !s.ok() && !s.IsShutdownInProgress());
|
|
// delete unnecessary files if any, this is done outside the mutex
|
|
if (job_context.HaveSomethingToDelete() || !log_buffer.IsEmpty()) {
|
|
mutex_.Unlock();
|
|
// Have to flush the info logs before bg_flush_scheduled_--
|
|
// because if bg_flush_scheduled_ becomes 0 and the lock is
|
|
// released, the deconstructor of DB can kick in and destroy all the
|
|
// states of DB so info_log might not be available after that point.
|
|
// It also applies to access other states that DB owns.
|
|
log_buffer.FlushBufferToLog();
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
PurgeObsoleteFiles(job_context);
|
|
}
|
|
job_context.Clean();
|
|
mutex_.Lock();
|
|
}
|
|
|
|
bg_flush_scheduled_--;
|
|
// See if there's more work to be done
|
|
MaybeScheduleFlushOrCompaction();
|
|
RecordFlushIOStats();
|
|
bg_cv_.SignalAll();
|
|
// IMPORTANT: there should be no code after calling SignalAll. This call may
|
|
// signal the DB destructor that it's OK to proceed with destruction. In
|
|
// that case, all DB variables will be dealloacated and referencing them
|
|
// will cause trouble.
|
|
}
|
|
}
|
|
|
|
void DBImpl::BackgroundCallCompaction() {
|
|
bool madeProgress = false;
|
|
JobContext job_context(next_job_id_.fetch_add(1), true);
|
|
|
|
MaybeDumpStats();
|
|
LogBuffer log_buffer(InfoLogLevel::INFO_LEVEL, db_options_.info_log.get());
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
|
|
auto pending_outputs_inserted_elem =
|
|
CaptureCurrentFileNumberInPendingOutputs();
|
|
|
|
assert(bg_compaction_scheduled_);
|
|
Status s = BackgroundCompaction(&madeProgress, &job_context, &log_buffer);
|
|
if (!s.ok() && !s.IsShutdownInProgress()) {
|
|
// Wait a little bit before retrying background compaction in
|
|
// case this is an environmental problem and we do not want to
|
|
// chew up resources for failed compactions for the duration of
|
|
// the problem.
|
|
uint64_t error_cnt =
|
|
default_cf_internal_stats_->BumpAndGetBackgroundErrorCount();
|
|
bg_cv_.SignalAll(); // In case a waiter can proceed despite the error
|
|
mutex_.Unlock();
|
|
log_buffer.FlushBufferToLog();
|
|
Log(InfoLogLevel::ERROR_LEVEL, db_options_.info_log,
|
|
"Waiting after background compaction error: %s, "
|
|
"Accumulated background error counts: %" PRIu64,
|
|
s.ToString().c_str(), error_cnt);
|
|
LogFlush(db_options_.info_log);
|
|
env_->SleepForMicroseconds(1000000);
|
|
mutex_.Lock();
|
|
}
|
|
|
|
ReleaseFileNumberFromPendingOutputs(pending_outputs_inserted_elem);
|
|
|
|
// If compaction failed, we want to delete all temporary files that we might
|
|
// have created (they might not be all recorded in job_context in case of a
|
|
// failure). Thus, we force full scan in FindObsoleteFiles()
|
|
FindObsoleteFiles(&job_context, !s.ok() && !s.IsShutdownInProgress());
|
|
|
|
// delete unnecessary files if any, this is done outside the mutex
|
|
if (job_context.HaveSomethingToDelete() || !log_buffer.IsEmpty()) {
|
|
mutex_.Unlock();
|
|
// Have to flush the info logs before bg_compaction_scheduled_--
|
|
// because if bg_flush_scheduled_ becomes 0 and the lock is
|
|
// released, the deconstructor of DB can kick in and destroy all the
|
|
// states of DB so info_log might not be available after that point.
|
|
// It also applies to access other states that DB owns.
|
|
log_buffer.FlushBufferToLog();
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
PurgeObsoleteFiles(job_context);
|
|
}
|
|
job_context.Clean();
|
|
mutex_.Lock();
|
|
}
|
|
|
|
bg_compaction_scheduled_--;
|
|
|
|
versions_->GetColumnFamilySet()->FreeDeadColumnFamilies();
|
|
|
|
// See if there's more work to be done
|
|
MaybeScheduleFlushOrCompaction();
|
|
if (madeProgress || bg_compaction_scheduled_ == 0 || bg_manual_only_ > 0) {
|
|
// signal if
|
|
// * madeProgress -- need to wakeup DelayWrite
|
|
// * bg_compaction_scheduled_ == 0 -- need to wakeup ~DBImpl
|
|
// * bg_manual_only_ > 0 -- need to wakeup RunManualCompaction
|
|
// If none of this is true, there is no need to signal since nobody is
|
|
// waiting for it
|
|
bg_cv_.SignalAll();
|
|
}
|
|
// IMPORTANT: there should be no code after calling SignalAll. This call may
|
|
// signal the DB destructor that it's OK to proceed with destruction. In
|
|
// that case, all DB variables will be dealloacated and referencing them
|
|
// will cause trouble.
|
|
}
|
|
}
|
|
|
|
Status DBImpl::BackgroundCompaction(bool* madeProgress, JobContext* job_context,
|
|
LogBuffer* log_buffer) {
|
|
*madeProgress = false;
|
|
mutex_.AssertHeld();
|
|
|
|
bool is_manual = (manual_compaction_ != nullptr) &&
|
|
(manual_compaction_->in_progress == false);
|
|
bool trivial_move_disallowed = is_manual &&
|
|
manual_compaction_->disallow_trivial_move;
|
|
|
|
CompactionJobStats compaction_job_stats;
|
|
Status status = bg_error_;
|
|
if (status.ok() && shutting_down_.load(std::memory_order_acquire)) {
|
|
status = Status::ShutdownInProgress();
|
|
}
|
|
|
|
if (!status.ok()) {
|
|
if (is_manual) {
|
|
manual_compaction_->status = status;
|
|
manual_compaction_->done = true;
|
|
manual_compaction_->in_progress = false;
|
|
manual_compaction_ = nullptr;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
if (is_manual) {
|
|
// another thread cannot pick up the same work
|
|
manual_compaction_->in_progress = true;
|
|
} else if (manual_compaction_ != nullptr) {
|
|
// there should be no automatic compactions running when manual compaction
|
|
// is running
|
|
return Status::OK();
|
|
}
|
|
|
|
// If there are no flush threads, then compaction thread needs to execute the
|
|
// flushes
|
|
if (db_options_.max_background_flushes == 0) {
|
|
// BackgroundFlush() will only execute a single flush. We keep calling it as
|
|
// long as there's more flushes to be done
|
|
while (!flush_queue_.empty()) {
|
|
LogToBuffer(
|
|
log_buffer,
|
|
"BackgroundCompaction calling BackgroundFlush. flush slots available "
|
|
"%d, compaction slots available %d",
|
|
db_options_.max_background_flushes - bg_flush_scheduled_,
|
|
db_options_.max_background_compactions - bg_compaction_scheduled_);
|
|
auto flush_status =
|
|
BackgroundFlush(madeProgress, job_context, log_buffer);
|
|
// the second condition will be false when a column family is dropped. we
|
|
// don't want to fail compaction because of that (because it might be a
|
|
// different column family)
|
|
if (!flush_status.ok() && !flush_status.IsShutdownInProgress()) {
|
|
if (is_manual) {
|
|
manual_compaction_->status = flush_status;
|
|
manual_compaction_->done = true;
|
|
manual_compaction_->in_progress = false;
|
|
manual_compaction_ = nullptr;
|
|
}
|
|
return flush_status;
|
|
}
|
|
}
|
|
}
|
|
|
|
unique_ptr<Compaction> c;
|
|
InternalKey manual_end_storage;
|
|
InternalKey* manual_end = &manual_end_storage;
|
|
if (is_manual) {
|
|
ManualCompaction* m = manual_compaction_;
|
|
assert(m->in_progress);
|
|
c.reset(m->cfd->CompactRange(
|
|
*m->cfd->GetLatestMutableCFOptions(), m->input_level, m->output_level,
|
|
m->output_path_id, m->begin, m->end, &manual_end));
|
|
if (!c) {
|
|
m->done = true;
|
|
LogToBuffer(log_buffer,
|
|
"[%s] Manual compaction from level-%d from %s .. "
|
|
"%s; nothing to do\n",
|
|
m->cfd->GetName().c_str(), m->input_level,
|
|
(m->begin ? m->begin->DebugString().c_str() : "(begin)"),
|
|
(m->end ? m->end->DebugString().c_str() : "(end)"));
|
|
} else {
|
|
LogToBuffer(log_buffer,
|
|
"[%s] Manual compaction from level-%d to level-%d from %s .. "
|
|
"%s; will stop at %s\n",
|
|
m->cfd->GetName().c_str(), m->input_level, c->output_level(),
|
|
(m->begin ? m->begin->DebugString().c_str() : "(begin)"),
|
|
(m->end ? m->end->DebugString().c_str() : "(end)"),
|
|
((m->done || manual_end == nullptr)
|
|
? "(end)"
|
|
: manual_end->DebugString().c_str()));
|
|
}
|
|
} else if (!compaction_queue_.empty()) {
|
|
// cfd is referenced here
|
|
auto cfd = PopFirstFromCompactionQueue();
|
|
// We unreference here because the following code will take a Ref() on
|
|
// this cfd if it is going to use it (Compaction class holds a
|
|
// reference).
|
|
// This will all happen under a mutex so we don't have to be afraid of
|
|
// somebody else deleting it.
|
|
if (cfd->Unref()) {
|
|
delete cfd;
|
|
// This was the last reference of the column family, so no need to
|
|
// compact.
|
|
return Status::OK();
|
|
}
|
|
|
|
// Pick up latest mutable CF Options and use it throughout the
|
|
// compaction job
|
|
// Compaction makes a copy of the latest MutableCFOptions. It should be used
|
|
// throughout the compaction procedure to make sure consistency. It will
|
|
// eventually be installed into SuperVersion
|
|
auto* mutable_cf_options = cfd->GetLatestMutableCFOptions();
|
|
if (!mutable_cf_options->disable_auto_compactions && !cfd->IsDropped()) {
|
|
// NOTE: try to avoid unnecessary copy of MutableCFOptions if
|
|
// compaction is not necessary. Need to make sure mutex is held
|
|
// until we make a copy in the following code
|
|
c.reset(cfd->PickCompaction(*mutable_cf_options, log_buffer));
|
|
if (c != nullptr) {
|
|
// update statistics
|
|
MeasureTime(stats_, NUM_FILES_IN_SINGLE_COMPACTION,
|
|
c->inputs(0)->size());
|
|
// There are three things that can change compaction score:
|
|
// 1) When flush or compaction finish. This case is covered by
|
|
// InstallSuperVersionAndScheduleWork
|
|
// 2) When MutableCFOptions changes. This case is also covered by
|
|
// InstallSuperVersionAndScheduleWork, because this is when the new
|
|
// options take effect.
|
|
// 3) When we Pick a new compaction, we "remove" those files being
|
|
// compacted from the calculation, which then influences compaction
|
|
// score. Here we check if we need the new compaction even without the
|
|
// files that are currently being compacted. If we need another
|
|
// compaction, we might be able to execute it in parallel, so we add it
|
|
// to the queue and schedule a new thread.
|
|
if (cfd->NeedsCompaction()) {
|
|
// Yes, we need more compactions!
|
|
AddToCompactionQueue(cfd);
|
|
++unscheduled_compactions_;
|
|
MaybeScheduleFlushOrCompaction();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!c) {
|
|
// Nothing to do
|
|
LogToBuffer(log_buffer, "Compaction nothing to do");
|
|
} else if (c->IsDeletionCompaction()) {
|
|
// TODO(icanadi) Do we want to honor snapshots here? i.e. not delete old
|
|
// file if there is alive snapshot pointing to it
|
|
assert(c->num_input_files(1) == 0);
|
|
assert(c->level() == 0);
|
|
assert(c->column_family_data()->ioptions()->compaction_style ==
|
|
kCompactionStyleFIFO);
|
|
|
|
compaction_job_stats.num_input_files = c->num_input_files(0);
|
|
|
|
for (const auto& f : *c->inputs(0)) {
|
|
c->edit()->DeleteFile(c->level(), f->fd.GetNumber());
|
|
}
|
|
status = versions_->LogAndApply(c->column_family_data(),
|
|
*c->mutable_cf_options(), c->edit(),
|
|
&mutex_, directories_.GetDbDir());
|
|
InstallSuperVersionAndScheduleWorkWrapper(
|
|
c->column_family_data(), job_context, *c->mutable_cf_options());
|
|
LogToBuffer(log_buffer, "[%s] Deleted %d files\n",
|
|
c->column_family_data()->GetName().c_str(),
|
|
c->num_input_files(0));
|
|
*madeProgress = true;
|
|
} else if (!trivial_move_disallowed && c->IsTrivialMove()) {
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCompaction:TrivialMove");
|
|
// Instrument for event update
|
|
// TODO(yhchiang): add op details for showing trivial-move.
|
|
ThreadStatusUtil::SetColumnFamily(c->column_family_data());
|
|
ThreadStatusUtil::SetThreadOperation(ThreadStatus::OP_COMPACTION);
|
|
|
|
compaction_job_stats.num_input_files = c->num_input_files(0);
|
|
|
|
// Move files to next level
|
|
int32_t moved_files = 0;
|
|
int64_t moved_bytes = 0;
|
|
for (size_t i = 0; i < c->num_input_files(0); i++) {
|
|
FileMetaData* f = c->input(0, i);
|
|
c->edit()->DeleteFile(c->level(), f->fd.GetNumber());
|
|
c->edit()->AddFile(c->output_level(), f->fd.GetNumber(),
|
|
f->fd.GetPathId(), f->fd.GetFileSize(), f->smallest,
|
|
f->largest, f->smallest_seqno, f->largest_seqno,
|
|
f->marked_for_compaction);
|
|
|
|
LogToBuffer(log_buffer,
|
|
"[%s] Moving #%" PRIu64 " to level-%d %" PRIu64 " bytes\n",
|
|
c->column_family_data()->GetName().c_str(), f->fd.GetNumber(),
|
|
c->output_level(), f->fd.GetFileSize());
|
|
++moved_files;
|
|
moved_bytes += f->fd.GetFileSize();
|
|
}
|
|
status = versions_->LogAndApply(c->column_family_data(),
|
|
*c->mutable_cf_options(), c->edit(),
|
|
&mutex_, directories_.GetDbDir());
|
|
// Use latest MutableCFOptions
|
|
InstallSuperVersionAndScheduleWorkWrapper(
|
|
c->column_family_data(), job_context, *c->mutable_cf_options());
|
|
|
|
VersionStorageInfo::LevelSummaryStorage tmp;
|
|
c->column_family_data()->internal_stats()->IncBytesMoved(c->output_level(),
|
|
moved_bytes);
|
|
{
|
|
event_logger_.LogToBuffer(log_buffer)
|
|
<< "job" << job_context->job_id << "event"
|
|
<< "trivial_move"
|
|
<< "destination_level" << c->output_level() << "files" << moved_files
|
|
<< "total_files_size" << moved_bytes;
|
|
}
|
|
LogToBuffer(
|
|
log_buffer,
|
|
"[%s] Moved #%d files to level-%d %" PRIu64 " bytes %s: %s\n",
|
|
c->column_family_data()->GetName().c_str(), moved_files,
|
|
c->output_level(), moved_bytes, status.ToString().c_str(),
|
|
c->column_family_data()->current()->storage_info()->LevelSummary(&tmp));
|
|
*madeProgress = true;
|
|
|
|
// Clear Instrument
|
|
ThreadStatusUtil::ResetThreadStatus();
|
|
} else {
|
|
TEST_SYNC_POINT("DBImpl::BackgroundCompaction:NonTrivial");
|
|
auto yield_callback = [&]() {
|
|
return CallFlushDuringCompaction(c->column_family_data(),
|
|
*c->mutable_cf_options(), job_context,
|
|
log_buffer);
|
|
};
|
|
assert(is_snapshot_supported_ || snapshots_.empty());
|
|
CompactionJob compaction_job(
|
|
job_context->job_id, c.get(), db_options_, env_options_,
|
|
versions_.get(), &shutting_down_, log_buffer, directories_.GetDbDir(),
|
|
directories_.GetDataDir(c->GetOutputPathId()), stats_,
|
|
snapshots_.GetAll(), table_cache_, std::move(yield_callback),
|
|
&event_logger_, c->mutable_cf_options()->paranoid_file_checks,
|
|
dbname_, &compaction_job_stats);
|
|
compaction_job.Prepare();
|
|
|
|
mutex_.Unlock();
|
|
status = compaction_job.Run();
|
|
mutex_.Lock();
|
|
|
|
compaction_job.Install(&status, *c->mutable_cf_options(), &mutex_);
|
|
if (status.ok()) {
|
|
InstallSuperVersionAndScheduleWorkWrapper(
|
|
c->column_family_data(), job_context, *c->mutable_cf_options());
|
|
}
|
|
*madeProgress = true;
|
|
}
|
|
if (c != nullptr) {
|
|
NotifyOnCompactionCompleted(
|
|
c->column_family_data(), c.get(), status,
|
|
compaction_job_stats, job_context->job_id);
|
|
c->ReleaseCompactionFiles(status);
|
|
*madeProgress = true;
|
|
}
|
|
// this will unref its input_version and column_family_data
|
|
c.reset();
|
|
|
|
if (status.ok()) {
|
|
// Done
|
|
} else if (status.IsShutdownInProgress()) {
|
|
// Ignore compaction errors found during shutting down
|
|
} else {
|
|
Log(InfoLogLevel::WARN_LEVEL, db_options_.info_log, "Compaction error: %s",
|
|
status.ToString().c_str());
|
|
if (db_options_.paranoid_checks && bg_error_.ok()) {
|
|
bg_error_ = status;
|
|
}
|
|
}
|
|
|
|
if (is_manual) {
|
|
ManualCompaction* m = manual_compaction_;
|
|
if (!status.ok()) {
|
|
m->status = status;
|
|
m->done = true;
|
|
}
|
|
// For universal compaction:
|
|
// Because universal compaction always happens at level 0, so one
|
|
// compaction will pick up all overlapped files. No files will be
|
|
// filtered out due to size limit and left for a successive compaction.
|
|
// So we can safely conclude the current compaction.
|
|
//
|
|
// Also note that, if we don't stop here, then the current compaction
|
|
// writes a new file back to level 0, which will be used in successive
|
|
// compaction. Hence the manual compaction will never finish.
|
|
//
|
|
// Stop the compaction if manual_end points to nullptr -- this means
|
|
// that we compacted the whole range. manual_end should always point
|
|
// to nullptr in case of universal compaction
|
|
if (manual_end == nullptr) {
|
|
m->done = true;
|
|
}
|
|
if (!m->done) {
|
|
// We only compacted part of the requested range. Update *m
|
|
// to the range that is left to be compacted.
|
|
// Universal and FIFO compactions should always compact the whole range
|
|
assert(m->cfd->ioptions()->compaction_style !=
|
|
kCompactionStyleUniversal ||
|
|
m->cfd->ioptions()->num_levels > 1);
|
|
assert(m->cfd->ioptions()->compaction_style != kCompactionStyleFIFO);
|
|
m->tmp_storage = *manual_end;
|
|
m->begin = &m->tmp_storage;
|
|
}
|
|
m->in_progress = false; // not being processed anymore
|
|
manual_compaction_ = nullptr;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
uint64_t DBImpl::CallFlushDuringCompaction(
|
|
ColumnFamilyData* cfd, const MutableCFOptions& mutable_cf_options,
|
|
JobContext* job_context, LogBuffer* log_buffer) {
|
|
if (db_options_.max_background_flushes > 0) {
|
|
// flush thread will take care of this
|
|
return 0;
|
|
}
|
|
if (cfd->imm()->imm_flush_needed.load(std::memory_order_relaxed)) {
|
|
const uint64_t imm_start = env_->NowMicros();
|
|
mutex_.Lock();
|
|
if (cfd->imm()->IsFlushPending()) {
|
|
cfd->Ref();
|
|
FlushMemTableToOutputFile(cfd, mutable_cf_options, nullptr, job_context,
|
|
log_buffer);
|
|
cfd->Unref();
|
|
bg_cv_.SignalAll(); // Wakeup DelayWrite() if necessary
|
|
}
|
|
mutex_.Unlock();
|
|
log_buffer->FlushBufferToLog();
|
|
return env_->NowMicros() - imm_start;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
namespace {
|
|
struct IterState {
|
|
IterState(DBImpl* _db, InstrumentedMutex* _mu, SuperVersion* _super_version)
|
|
: db(_db), mu(_mu), super_version(_super_version) {}
|
|
|
|
DBImpl* db;
|
|
InstrumentedMutex* mu;
|
|
SuperVersion* super_version;
|
|
};
|
|
|
|
static void CleanupIteratorState(void* arg1, void* arg2) {
|
|
IterState* state = reinterpret_cast<IterState*>(arg1);
|
|
|
|
if (state->super_version->Unref()) {
|
|
// Job id == 0 means that this is not our background process, but rather
|
|
// user thread
|
|
JobContext job_context(0);
|
|
|
|
state->mu->Lock();
|
|
state->super_version->Cleanup();
|
|
state->db->FindObsoleteFiles(&job_context, false, true);
|
|
state->mu->Unlock();
|
|
|
|
delete state->super_version;
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
state->db->PurgeObsoleteFiles(job_context);
|
|
}
|
|
job_context.Clean();
|
|
}
|
|
|
|
delete state;
|
|
}
|
|
} // namespace
|
|
|
|
Iterator* DBImpl::NewInternalIterator(const ReadOptions& read_options,
|
|
ColumnFamilyData* cfd,
|
|
SuperVersion* super_version,
|
|
Arena* arena) {
|
|
Iterator* internal_iter;
|
|
assert(arena != nullptr);
|
|
// Need to create internal iterator from the arena.
|
|
MergeIteratorBuilder merge_iter_builder(&cfd->internal_comparator(), arena);
|
|
// Collect iterator for mutable mem
|
|
merge_iter_builder.AddIterator(
|
|
super_version->mem->NewIterator(read_options, arena));
|
|
// Collect all needed child iterators for immutable memtables
|
|
super_version->imm->AddIterators(read_options, &merge_iter_builder);
|
|
// Collect iterators for files in L0 - Ln
|
|
super_version->current->AddIterators(read_options, env_options_,
|
|
&merge_iter_builder);
|
|
internal_iter = merge_iter_builder.Finish();
|
|
IterState* cleanup = new IterState(this, &mutex_, super_version);
|
|
internal_iter->RegisterCleanup(CleanupIteratorState, cleanup, nullptr);
|
|
|
|
return internal_iter;
|
|
}
|
|
|
|
ColumnFamilyHandle* DBImpl::DefaultColumnFamily() const {
|
|
return default_cf_handle_;
|
|
}
|
|
|
|
Status DBImpl::Get(const ReadOptions& read_options,
|
|
ColumnFamilyHandle* column_family, const Slice& key,
|
|
std::string* value) {
|
|
return GetImpl(read_options, column_family, key, value);
|
|
}
|
|
|
|
// JobContext gets created and destructed outside of the lock --
|
|
// we
|
|
// use this convinently to:
|
|
// * malloc one SuperVersion() outside of the lock -- new_superversion
|
|
// * delete SuperVersion()s outside of the lock -- superversions_to_free
|
|
//
|
|
// However, if InstallSuperVersionAndScheduleWork() gets called twice with the
|
|
// same job_context, we can't reuse the SuperVersion() that got
|
|
// malloced because
|
|
// first call already used it. In that rare case, we take a hit and create a
|
|
// new SuperVersion() inside of the mutex. We do similar thing
|
|
// for superversion_to_free
|
|
void DBImpl::InstallSuperVersionAndScheduleWorkWrapper(
|
|
ColumnFamilyData* cfd, JobContext* job_context,
|
|
const MutableCFOptions& mutable_cf_options) {
|
|
mutex_.AssertHeld();
|
|
SuperVersion* old_superversion = InstallSuperVersionAndScheduleWork(
|
|
cfd, job_context->new_superversion, mutable_cf_options);
|
|
job_context->new_superversion = nullptr;
|
|
job_context->superversions_to_free.push_back(old_superversion);
|
|
}
|
|
|
|
SuperVersion* DBImpl::InstallSuperVersionAndScheduleWork(
|
|
ColumnFamilyData* cfd, SuperVersion* new_sv,
|
|
const MutableCFOptions& mutable_cf_options) {
|
|
mutex_.AssertHeld();
|
|
|
|
// Update max_total_in_memory_state_
|
|
size_t old_memtable_size = 0;
|
|
auto* old_sv = cfd->GetSuperVersion();
|
|
if (old_sv) {
|
|
old_memtable_size = old_sv->mutable_cf_options.write_buffer_size *
|
|
old_sv->mutable_cf_options.max_write_buffer_number;
|
|
}
|
|
|
|
auto* old = cfd->InstallSuperVersion(
|
|
new_sv ? new_sv : new SuperVersion(), &mutex_, mutable_cf_options);
|
|
|
|
// Whenever we install new SuperVersion, we might need to issue new flushes or
|
|
// compactions.
|
|
SchedulePendingFlush(cfd);
|
|
SchedulePendingCompaction(cfd);
|
|
MaybeScheduleFlushOrCompaction();
|
|
|
|
// Update max_total_in_memory_state_
|
|
max_total_in_memory_state_ =
|
|
max_total_in_memory_state_ - old_memtable_size +
|
|
mutable_cf_options.write_buffer_size *
|
|
mutable_cf_options.max_write_buffer_number;
|
|
return old;
|
|
}
|
|
|
|
Status DBImpl::GetImpl(const ReadOptions& read_options,
|
|
ColumnFamilyHandle* column_family, const Slice& key,
|
|
std::string* value, bool* value_found) {
|
|
StopWatch sw(env_, stats_, DB_GET);
|
|
PERF_TIMER_GUARD(get_snapshot_time);
|
|
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
|
|
SequenceNumber snapshot;
|
|
if (read_options.snapshot != nullptr) {
|
|
snapshot = reinterpret_cast<const SnapshotImpl*>(
|
|
read_options.snapshot)->number_;
|
|
} else {
|
|
snapshot = versions_->LastSequence();
|
|
}
|
|
// Acquire SuperVersion
|
|
SuperVersion* sv = GetAndRefSuperVersion(cfd);
|
|
// Prepare to store a list of merge operations if merge occurs.
|
|
MergeContext merge_context;
|
|
|
|
Status s;
|
|
// First look in the memtable, then in the immutable memtable (if any).
|
|
// s is both in/out. When in, s could either be OK or MergeInProgress.
|
|
// merge_operands will contain the sequence of merges in the latter case.
|
|
LookupKey lkey(key, snapshot);
|
|
PERF_TIMER_STOP(get_snapshot_time);
|
|
|
|
if (sv->mem->Get(lkey, value, &s, &merge_context)) {
|
|
// Done
|
|
RecordTick(stats_, MEMTABLE_HIT);
|
|
} else if (sv->imm->Get(lkey, value, &s, &merge_context)) {
|
|
// Done
|
|
RecordTick(stats_, MEMTABLE_HIT);
|
|
} else {
|
|
PERF_TIMER_GUARD(get_from_output_files_time);
|
|
sv->current->Get(read_options, lkey, value, &s, &merge_context,
|
|
value_found);
|
|
RecordTick(stats_, MEMTABLE_MISS);
|
|
}
|
|
|
|
{
|
|
PERF_TIMER_GUARD(get_post_process_time);
|
|
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
|
|
RecordTick(stats_, NUMBER_KEYS_READ);
|
|
RecordTick(stats_, BYTES_READ, value->size());
|
|
}
|
|
return s;
|
|
}
|
|
|
|
std::vector<Status> DBImpl::MultiGet(
|
|
const ReadOptions& read_options,
|
|
const std::vector<ColumnFamilyHandle*>& column_family,
|
|
const std::vector<Slice>& keys, std::vector<std::string>* values) {
|
|
|
|
StopWatch sw(env_, stats_, DB_MULTIGET);
|
|
PERF_TIMER_GUARD(get_snapshot_time);
|
|
|
|
SequenceNumber snapshot;
|
|
|
|
struct MultiGetColumnFamilyData {
|
|
ColumnFamilyData* cfd;
|
|
SuperVersion* super_version;
|
|
};
|
|
std::unordered_map<uint32_t, MultiGetColumnFamilyData*> multiget_cf_data;
|
|
// fill up and allocate outside of mutex
|
|
for (auto cf : column_family) {
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(cf);
|
|
auto cfd = cfh->cfd();
|
|
if (multiget_cf_data.find(cfd->GetID()) == multiget_cf_data.end()) {
|
|
auto mgcfd = new MultiGetColumnFamilyData();
|
|
mgcfd->cfd = cfd;
|
|
multiget_cf_data.insert({cfd->GetID(), mgcfd});
|
|
}
|
|
}
|
|
|
|
mutex_.Lock();
|
|
if (read_options.snapshot != nullptr) {
|
|
snapshot = reinterpret_cast<const SnapshotImpl*>(
|
|
read_options.snapshot)->number_;
|
|
} else {
|
|
snapshot = versions_->LastSequence();
|
|
}
|
|
for (auto mgd_iter : multiget_cf_data) {
|
|
mgd_iter.second->super_version =
|
|
mgd_iter.second->cfd->GetSuperVersion()->Ref();
|
|
}
|
|
mutex_.Unlock();
|
|
|
|
// Contain a list of merge operations if merge occurs.
|
|
MergeContext merge_context;
|
|
|
|
// Note: this always resizes the values array
|
|
size_t num_keys = keys.size();
|
|
std::vector<Status> stat_list(num_keys);
|
|
values->resize(num_keys);
|
|
|
|
// Keep track of bytes that we read for statistics-recording later
|
|
uint64_t bytes_read = 0;
|
|
PERF_TIMER_STOP(get_snapshot_time);
|
|
|
|
// For each of the given keys, apply the entire "get" process as follows:
|
|
// First look in the memtable, then in the immutable memtable (if any).
|
|
// s is both in/out. When in, s could either be OK or MergeInProgress.
|
|
// merge_operands will contain the sequence of merges in the latter case.
|
|
for (size_t i = 0; i < num_keys; ++i) {
|
|
merge_context.Clear();
|
|
Status& s = stat_list[i];
|
|
std::string* value = &(*values)[i];
|
|
|
|
LookupKey lkey(keys[i], snapshot);
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family[i]);
|
|
auto mgd_iter = multiget_cf_data.find(cfh->cfd()->GetID());
|
|
assert(mgd_iter != multiget_cf_data.end());
|
|
auto mgd = mgd_iter->second;
|
|
auto super_version = mgd->super_version;
|
|
if (super_version->mem->Get(lkey, value, &s, &merge_context)) {
|
|
// Done
|
|
} else if (super_version->imm->Get(lkey, value, &s, &merge_context)) {
|
|
// Done
|
|
} else {
|
|
PERF_TIMER_GUARD(get_from_output_files_time);
|
|
super_version->current->Get(read_options, lkey, value, &s,
|
|
&merge_context);
|
|
}
|
|
|
|
if (s.ok()) {
|
|
bytes_read += value->size();
|
|
}
|
|
}
|
|
|
|
// Post processing (decrement reference counts and record statistics)
|
|
PERF_TIMER_GUARD(get_post_process_time);
|
|
autovector<SuperVersion*> superversions_to_delete;
|
|
|
|
// TODO(icanadi) do we need lock here or just around Cleanup()?
|
|
mutex_.Lock();
|
|
for (auto mgd_iter : multiget_cf_data) {
|
|
auto mgd = mgd_iter.second;
|
|
if (mgd->super_version->Unref()) {
|
|
mgd->super_version->Cleanup();
|
|
superversions_to_delete.push_back(mgd->super_version);
|
|
}
|
|
}
|
|
mutex_.Unlock();
|
|
|
|
for (auto td : superversions_to_delete) {
|
|
delete td;
|
|
}
|
|
for (auto mgd : multiget_cf_data) {
|
|
delete mgd.second;
|
|
}
|
|
|
|
RecordTick(stats_, NUMBER_MULTIGET_CALLS);
|
|
RecordTick(stats_, NUMBER_MULTIGET_KEYS_READ, num_keys);
|
|
RecordTick(stats_, NUMBER_MULTIGET_BYTES_READ, bytes_read);
|
|
PERF_TIMER_STOP(get_post_process_time);
|
|
|
|
return stat_list;
|
|
}
|
|
|
|
Status DBImpl::CreateColumnFamily(const ColumnFamilyOptions& cf_options,
|
|
const std::string& column_family_name,
|
|
ColumnFamilyHandle** handle) {
|
|
Status s;
|
|
*handle = nullptr;
|
|
|
|
s = CheckCompressionSupported(cf_options);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
|
|
if (versions_->GetColumnFamilySet()->GetColumnFamily(column_family_name) !=
|
|
nullptr) {
|
|
return Status::InvalidArgument("Column family already exists");
|
|
}
|
|
VersionEdit edit;
|
|
edit.AddColumnFamily(column_family_name);
|
|
uint32_t new_id = versions_->GetColumnFamilySet()->GetNextColumnFamilyID();
|
|
edit.SetColumnFamily(new_id);
|
|
edit.SetLogNumber(logfile_number_);
|
|
edit.SetComparatorName(cf_options.comparator->Name());
|
|
|
|
// LogAndApply will both write the creation in MANIFEST and create
|
|
// ColumnFamilyData object
|
|
Options opt(db_options_, cf_options);
|
|
{ // write thread
|
|
WriteThread::Writer w(&mutex_);
|
|
s = write_thread_.EnterWriteThread(&w, 0);
|
|
assert(s.ok() && !w.done); // No timeout and nobody should do our job
|
|
// LogAndApply will both write the creation in MANIFEST and create
|
|
// ColumnFamilyData object
|
|
s = versions_->LogAndApply(
|
|
nullptr, MutableCFOptions(opt, ImmutableCFOptions(opt)), &edit,
|
|
&mutex_, directories_.GetDbDir(), false, &cf_options);
|
|
write_thread_.ExitWriteThread(&w, &w, s);
|
|
}
|
|
if (s.ok()) {
|
|
single_column_family_mode_ = false;
|
|
auto* cfd =
|
|
versions_->GetColumnFamilySet()->GetColumnFamily(column_family_name);
|
|
assert(cfd != nullptr);
|
|
delete InstallSuperVersionAndScheduleWork(
|
|
cfd, nullptr, *cfd->GetLatestMutableCFOptions());
|
|
|
|
if (!cfd->mem()->IsSnapshotSupported()) {
|
|
is_snapshot_supported_ = false;
|
|
}
|
|
|
|
*handle = new ColumnFamilyHandleImpl(cfd, this, &mutex_);
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"Created column family [%s] (ID %u)",
|
|
column_family_name.c_str(), (unsigned)cfd->GetID());
|
|
} else {
|
|
Log(InfoLogLevel::ERROR_LEVEL, db_options_.info_log,
|
|
"Creating column family [%s] FAILED -- %s",
|
|
column_family_name.c_str(), s.ToString().c_str());
|
|
}
|
|
} // InstrumentedMutexLock l(&mutex_)
|
|
|
|
// this is outside the mutex
|
|
if (s.ok()) {
|
|
NewThreadStatusCfInfo(
|
|
reinterpret_cast<ColumnFamilyHandleImpl*>(*handle)->cfd());
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::DropColumnFamily(ColumnFamilyHandle* column_family) {
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
if (cfd->GetID() == 0) {
|
|
return Status::InvalidArgument("Can't drop default column family");
|
|
}
|
|
|
|
bool cf_support_snapshot = cfd->mem()->IsSnapshotSupported();
|
|
|
|
VersionEdit edit;
|
|
edit.DropColumnFamily();
|
|
edit.SetColumnFamily(cfd->GetID());
|
|
|
|
Status s;
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
if (cfd->IsDropped()) {
|
|
s = Status::InvalidArgument("Column family already dropped!\n");
|
|
}
|
|
if (s.ok()) {
|
|
// we drop column family from a single write thread
|
|
WriteThread::Writer w(&mutex_);
|
|
s = write_thread_.EnterWriteThread(&w, 0);
|
|
assert(s.ok() && !w.done); // No timeout and nobody should do our job
|
|
s = versions_->LogAndApply(cfd, *cfd->GetLatestMutableCFOptions(),
|
|
&edit, &mutex_);
|
|
write_thread_.ExitWriteThread(&w, &w, s);
|
|
}
|
|
|
|
if (!cf_support_snapshot) {
|
|
// Dropped Column Family doesn't support snapshot. Need to recalculate
|
|
// is_snapshot_supported_.
|
|
bool new_is_snapshot_supported = true;
|
|
for (auto c : *versions_->GetColumnFamilySet()) {
|
|
if (!c->IsDropped() && !c->mem()->IsSnapshotSupported()) {
|
|
new_is_snapshot_supported = false;
|
|
break;
|
|
}
|
|
}
|
|
is_snapshot_supported_ = new_is_snapshot_supported;
|
|
}
|
|
}
|
|
|
|
if (s.ok()) {
|
|
// Note that here we erase the associated cf_info of the to-be-dropped
|
|
// cfd before its ref-count goes to zero to avoid having to erase cf_info
|
|
// later inside db_mutex.
|
|
EraseThreadStatusCfInfo(cfd);
|
|
assert(cfd->IsDropped());
|
|
auto* mutable_cf_options = cfd->GetLatestMutableCFOptions();
|
|
max_total_in_memory_state_ -= mutable_cf_options->write_buffer_size *
|
|
mutable_cf_options->max_write_buffer_number;
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"Dropped column family with id %u\n",
|
|
cfd->GetID());
|
|
} else {
|
|
Log(InfoLogLevel::ERROR_LEVEL, db_options_.info_log,
|
|
"Dropping column family with id %u FAILED -- %s\n",
|
|
cfd->GetID(), s.ToString().c_str());
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
bool DBImpl::KeyMayExist(const ReadOptions& read_options,
|
|
ColumnFamilyHandle* column_family, const Slice& key,
|
|
std::string* value, bool* value_found) {
|
|
if (value_found != nullptr) {
|
|
// falsify later if key-may-exist but can't fetch value
|
|
*value_found = true;
|
|
}
|
|
ReadOptions roptions = read_options;
|
|
roptions.read_tier = kBlockCacheTier; // read from block cache only
|
|
auto s = GetImpl(roptions, column_family, key, value, value_found);
|
|
|
|
// If block_cache is enabled and the index block of the table didn't
|
|
// not present in block_cache, the return value will be Status::Incomplete.
|
|
// In this case, key may still exist in the table.
|
|
return s.ok() || s.IsIncomplete();
|
|
}
|
|
|
|
Iterator* DBImpl::NewIterator(const ReadOptions& read_options,
|
|
ColumnFamilyHandle* column_family) {
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
|
|
XFUNC_TEST("", "managed_new", managed_new1, xf_manage_new,
|
|
reinterpret_cast<DBImpl*>(this),
|
|
const_cast<ReadOptions*>(&read_options), is_snapshot_supported_);
|
|
if (read_options.managed) {
|
|
#ifdef ROCKSDB_LITE
|
|
// not supported in lite version
|
|
return NewErrorIterator(Status::InvalidArgument(
|
|
"Managed Iterators not supported in RocksDBLite."));
|
|
#else
|
|
if ((read_options.tailing) || (read_options.snapshot != nullptr) ||
|
|
(is_snapshot_supported_)) {
|
|
return new ManagedIterator(this, read_options, cfd);
|
|
}
|
|
// Managed iter not supported
|
|
return NewErrorIterator(Status::InvalidArgument(
|
|
"Managed Iterators not supported without snapshots."));
|
|
#endif
|
|
} else if (read_options.tailing) {
|
|
#ifdef ROCKSDB_LITE
|
|
// not supported in lite version
|
|
return nullptr;
|
|
#else
|
|
SuperVersion* sv = cfd->GetReferencedSuperVersion(&mutex_);
|
|
auto iter = new ForwardIterator(this, read_options, cfd, sv);
|
|
return NewDBIterator(env_, *cfd->ioptions(), cfd->user_comparator(), iter,
|
|
kMaxSequenceNumber,
|
|
sv->mutable_cf_options.max_sequential_skip_in_iterations,
|
|
read_options.iterate_upper_bound);
|
|
#endif
|
|
} else {
|
|
SequenceNumber latest_snapshot = versions_->LastSequence();
|
|
SuperVersion* sv = cfd->GetReferencedSuperVersion(&mutex_);
|
|
|
|
auto snapshot =
|
|
read_options.snapshot != nullptr
|
|
? reinterpret_cast<const SnapshotImpl*>(
|
|
read_options.snapshot)->number_
|
|
: latest_snapshot;
|
|
|
|
// Try to generate a DB iterator tree in continuous memory area to be
|
|
// cache friendly. Here is an example of result:
|
|
// +-------------------------------+
|
|
// | |
|
|
// | ArenaWrappedDBIter |
|
|
// | + |
|
|
// | +---> Inner Iterator ------------+
|
|
// | | | |
|
|
// | | +-- -- -- -- -- -- -- --+ |
|
|
// | +--- | Arena | |
|
|
// | | | |
|
|
// | Allocated Memory: | |
|
|
// | | +-------------------+ |
|
|
// | | | DBIter | <---+
|
|
// | | + |
|
|
// | | | +-> iter_ ------------+
|
|
// | | | | |
|
|
// | | +-------------------+ |
|
|
// | | | MergingIterator | <---+
|
|
// | | + |
|
|
// | | | +->child iter1 ------------+
|
|
// | | | | | |
|
|
// | | +->child iter2 ----------+ |
|
|
// | | | | | | |
|
|
// | | | +->child iter3 --------+ | |
|
|
// | | | | | |
|
|
// | | +-------------------+ | | |
|
|
// | | | Iterator1 | <--------+
|
|
// | | +-------------------+ | |
|
|
// | | | Iterator2 | <------+
|
|
// | | +-------------------+ |
|
|
// | | | Iterator3 | <----+
|
|
// | | +-------------------+
|
|
// | | |
|
|
// +-------+-----------------------+
|
|
//
|
|
// ArenaWrappedDBIter inlines an arena area where all the iterartor in the
|
|
// the iterator tree is allocated in the order of being accessed when
|
|
// querying.
|
|
// Laying out the iterators in the order of being accessed makes it more
|
|
// likely that any iterator pointer is close to the iterator it points to so
|
|
// that they are likely to be in the same cache line and/or page.
|
|
ArenaWrappedDBIter* db_iter = NewArenaWrappedDbIterator(
|
|
env_, *cfd->ioptions(), cfd->user_comparator(),
|
|
snapshot, sv->mutable_cf_options.max_sequential_skip_in_iterations,
|
|
read_options.iterate_upper_bound);
|
|
|
|
Iterator* internal_iter =
|
|
NewInternalIterator(read_options, cfd, sv, db_iter->GetArena());
|
|
db_iter->SetIterUnderDBIter(internal_iter);
|
|
|
|
return db_iter;
|
|
}
|
|
// To stop compiler from complaining
|
|
return nullptr;
|
|
}
|
|
|
|
Status DBImpl::NewIterators(
|
|
const ReadOptions& read_options,
|
|
const std::vector<ColumnFamilyHandle*>& column_families,
|
|
std::vector<Iterator*>* iterators) {
|
|
iterators->clear();
|
|
iterators->reserve(column_families.size());
|
|
XFUNC_TEST("", "managed_new", managed_new1, xf_manage_new,
|
|
reinterpret_cast<DBImpl*>(this),
|
|
const_cast<ReadOptions*>(&read_options), is_snapshot_supported_);
|
|
if (read_options.managed) {
|
|
#ifdef ROCKSDB_LITE
|
|
return Status::InvalidArgument(
|
|
"Managed interator not supported in RocksDB lite");
|
|
#else
|
|
if ((!read_options.tailing) && (read_options.snapshot == nullptr) &&
|
|
(!is_snapshot_supported_)) {
|
|
return Status::InvalidArgument(
|
|
"Managed interator not supported without snapshots");
|
|
}
|
|
for (auto cfh : column_families) {
|
|
auto cfd = reinterpret_cast<ColumnFamilyHandleImpl*>(cfh)->cfd();
|
|
auto iter = new ManagedIterator(this, read_options, cfd);
|
|
iterators->push_back(iter);
|
|
}
|
|
#endif
|
|
} else if (read_options.tailing) {
|
|
#ifdef ROCKSDB_LITE
|
|
return Status::InvalidArgument(
|
|
"Tailing interator not supported in RocksDB lite");
|
|
#else
|
|
for (auto cfh : column_families) {
|
|
auto cfd = reinterpret_cast<ColumnFamilyHandleImpl*>(cfh)->cfd();
|
|
SuperVersion* sv = cfd->GetReferencedSuperVersion(&mutex_);
|
|
auto iter = new ForwardIterator(this, read_options, cfd, sv);
|
|
iterators->push_back(
|
|
NewDBIterator(env_, *cfd->ioptions(), cfd->user_comparator(), iter,
|
|
kMaxSequenceNumber,
|
|
sv->mutable_cf_options.max_sequential_skip_in_iterations));
|
|
}
|
|
#endif
|
|
} else {
|
|
SequenceNumber latest_snapshot = versions_->LastSequence();
|
|
|
|
for (size_t i = 0; i < column_families.size(); ++i) {
|
|
auto* cfd = reinterpret_cast<ColumnFamilyHandleImpl*>(
|
|
column_families[i])->cfd();
|
|
SuperVersion* sv = cfd->GetReferencedSuperVersion(&mutex_);
|
|
|
|
auto snapshot =
|
|
read_options.snapshot != nullptr
|
|
? reinterpret_cast<const SnapshotImpl*>(
|
|
read_options.snapshot)->number_
|
|
: latest_snapshot;
|
|
|
|
ArenaWrappedDBIter* db_iter = NewArenaWrappedDbIterator(
|
|
env_, *cfd->ioptions(), cfd->user_comparator(), snapshot,
|
|
sv->mutable_cf_options.max_sequential_skip_in_iterations);
|
|
Iterator* internal_iter = NewInternalIterator(
|
|
read_options, cfd, sv, db_iter->GetArena());
|
|
db_iter->SetIterUnderDBIter(internal_iter);
|
|
iterators->push_back(db_iter);
|
|
}
|
|
}
|
|
|
|
return Status::OK();
|
|
}
|
|
|
|
const Snapshot* DBImpl::GetSnapshot() {
|
|
int64_t unix_time = 0;
|
|
env_->GetCurrentTime(&unix_time); // Ignore error
|
|
SnapshotImpl* s = new SnapshotImpl;
|
|
|
|
InstrumentedMutexLock l(&mutex_);
|
|
// returns null if the underlying memtable does not support snapshot.
|
|
if (!is_snapshot_supported_) {
|
|
delete s;
|
|
return nullptr;
|
|
}
|
|
return snapshots_.New(s, versions_->LastSequence(), unix_time);
|
|
}
|
|
|
|
void DBImpl::ReleaseSnapshot(const Snapshot* s) {
|
|
const SnapshotImpl* casted_s = reinterpret_cast<const SnapshotImpl*>(s);
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
snapshots_.Delete(casted_s);
|
|
}
|
|
delete casted_s;
|
|
}
|
|
|
|
// Convenience methods
|
|
Status DBImpl::Put(const WriteOptions& o, ColumnFamilyHandle* column_family,
|
|
const Slice& key, const Slice& val) {
|
|
return DB::Put(o, column_family, key, val);
|
|
}
|
|
|
|
Status DBImpl::Merge(const WriteOptions& o, ColumnFamilyHandle* column_family,
|
|
const Slice& key, const Slice& val) {
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
if (!cfh->cfd()->ioptions()->merge_operator) {
|
|
return Status::NotSupported("Provide a merge_operator when opening DB");
|
|
} else {
|
|
return DB::Merge(o, column_family, key, val);
|
|
}
|
|
}
|
|
|
|
Status DBImpl::Delete(const WriteOptions& write_options,
|
|
ColumnFamilyHandle* column_family, const Slice& key) {
|
|
return DB::Delete(write_options, column_family, key);
|
|
}
|
|
|
|
Status DBImpl::Write(const WriteOptions& write_options, WriteBatch* my_batch) {
|
|
return WriteImpl(write_options, my_batch, nullptr);
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
Status DBImpl::WriteWithCallback(const WriteOptions& write_options,
|
|
WriteBatch* my_batch,
|
|
WriteCallback* callback) {
|
|
return WriteImpl(write_options, my_batch, callback);
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
Status DBImpl::WriteImpl(const WriteOptions& write_options,
|
|
WriteBatch* my_batch, WriteCallback* callback) {
|
|
if (my_batch == nullptr) {
|
|
return Status::Corruption("Batch is nullptr!");
|
|
}
|
|
|
|
Status status;
|
|
bool xfunc_attempted_write = false;
|
|
XFUNC_TEST("transaction", "transaction_xftest_write_impl",
|
|
xf_transaction_write1, xf_transaction_write, write_options,
|
|
db_options_, my_batch, callback, this, &status,
|
|
&xfunc_attempted_write);
|
|
if (xfunc_attempted_write) {
|
|
// Test already did the write
|
|
return status;
|
|
}
|
|
|
|
PERF_TIMER_GUARD(write_pre_and_post_process_time);
|
|
WriteThread::Writer w(&mutex_);
|
|
w.batch = my_batch;
|
|
w.sync = write_options.sync;
|
|
w.disableWAL = write_options.disableWAL;
|
|
w.in_batch_group = false;
|
|
w.done = false;
|
|
w.has_callback = (callback != nullptr) ? true : false;
|
|
w.timeout_hint_us = write_options.timeout_hint_us;
|
|
|
|
uint64_t expiration_time = 0;
|
|
bool has_timeout = false;
|
|
if (w.timeout_hint_us == 0) {
|
|
w.timeout_hint_us = WriteThread::kNoTimeOut;
|
|
} else {
|
|
expiration_time = env_->NowMicros() + w.timeout_hint_us;
|
|
has_timeout = true;
|
|
}
|
|
|
|
if (!write_options.disableWAL) {
|
|
RecordTick(stats_, WRITE_WITH_WAL);
|
|
}
|
|
|
|
StopWatch write_sw(env_, db_options_.statistics.get(), DB_WRITE);
|
|
|
|
WriteContext context;
|
|
mutex_.Lock();
|
|
|
|
if (!write_options.disableWAL) {
|
|
default_cf_internal_stats_->AddDBStats(InternalStats::WRITE_WITH_WAL, 1);
|
|
}
|
|
|
|
status = write_thread_.EnterWriteThread(&w, expiration_time);
|
|
assert(status.ok() || status.IsTimedOut());
|
|
if (status.IsTimedOut()) {
|
|
mutex_.Unlock();
|
|
RecordTick(stats_, WRITE_TIMEDOUT);
|
|
return Status::TimedOut();
|
|
}
|
|
if (w.done) { // write was done by someone else
|
|
default_cf_internal_stats_->AddDBStats(InternalStats::WRITE_DONE_BY_OTHER,
|
|
1);
|
|
mutex_.Unlock();
|
|
RecordTick(stats_, WRITE_DONE_BY_OTHER);
|
|
return w.status;
|
|
}
|
|
|
|
RecordTick(stats_, WRITE_DONE_BY_SELF);
|
|
default_cf_internal_stats_->AddDBStats(InternalStats::WRITE_DONE_BY_SELF, 1);
|
|
|
|
// Once reaches this point, the current writer "w" will try to do its write
|
|
// job. It may also pick up some of the remaining writers in the "writers_"
|
|
// when it finds suitable, and finish them in the same write batch.
|
|
// This is how a write job could be done by the other writer.
|
|
assert(!single_column_family_mode_ ||
|
|
versions_->GetColumnFamilySet()->NumberOfColumnFamilies() == 1);
|
|
|
|
uint64_t max_total_wal_size = (db_options_.max_total_wal_size == 0)
|
|
? 4 * max_total_in_memory_state_
|
|
: db_options_.max_total_wal_size;
|
|
if (UNLIKELY(!single_column_family_mode_) &&
|
|
alive_log_files_.begin()->getting_flushed == false &&
|
|
total_log_size_ > max_total_wal_size) {
|
|
uint64_t flush_column_family_if_log_file = alive_log_files_.begin()->number;
|
|
alive_log_files_.begin()->getting_flushed = true;
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"Flushing all column families with data in WAL number %" PRIu64
|
|
". Total log size is %" PRIu64 " while max_total_wal_size is %" PRIu64,
|
|
flush_column_family_if_log_file, total_log_size_, max_total_wal_size);
|
|
// no need to refcount because drop is happening in write thread, so can't
|
|
// happen while we're in the write thread
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
if (cfd->IsDropped()) {
|
|
continue;
|
|
}
|
|
if (cfd->GetLogNumber() <= flush_column_family_if_log_file) {
|
|
status = SwitchMemtable(cfd, &context);
|
|
if (!status.ok()) {
|
|
break;
|
|
}
|
|
cfd->imm()->FlushRequested();
|
|
SchedulePendingFlush(cfd);
|
|
}
|
|
}
|
|
MaybeScheduleFlushOrCompaction();
|
|
} else if (UNLIKELY(write_buffer_.ShouldFlush())) {
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"Flushing all column families. Write buffer is using %" PRIu64
|
|
" bytes out of a total of %" PRIu64 ".",
|
|
write_buffer_.memory_usage(), write_buffer_.buffer_size());
|
|
// no need to refcount because drop is happening in write thread, so can't
|
|
// happen while we're in the write thread
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
if (cfd->IsDropped()) {
|
|
continue;
|
|
}
|
|
if (!cfd->mem()->IsEmpty()) {
|
|
status = SwitchMemtable(cfd, &context);
|
|
if (!status.ok()) {
|
|
break;
|
|
}
|
|
cfd->imm()->FlushRequested();
|
|
SchedulePendingFlush(cfd);
|
|
}
|
|
}
|
|
MaybeScheduleFlushOrCompaction();
|
|
}
|
|
|
|
if (UNLIKELY(status.ok() && !bg_error_.ok())) {
|
|
status = bg_error_;
|
|
}
|
|
|
|
if (UNLIKELY(status.ok() && !flush_scheduler_.Empty())) {
|
|
status = ScheduleFlushes(&context);
|
|
}
|
|
|
|
if (UNLIKELY(status.ok()) &&
|
|
(write_controller_.IsStopped() || write_controller_.NeedsDelay())) {
|
|
PERF_TIMER_STOP(write_pre_and_post_process_time);
|
|
PERF_TIMER_GUARD(write_delay_time);
|
|
// We don't know size of curent batch so that we always use the size
|
|
// for previous one. It might create a fairness issue that expiration
|
|
// might happen for smaller writes but larger writes can go through.
|
|
// Can optimize it if it is an issue.
|
|
status = DelayWrite(last_batch_group_size_, expiration_time);
|
|
PERF_TIMER_START(write_pre_and_post_process_time);
|
|
}
|
|
|
|
if (UNLIKELY(status.ok() && has_timeout &&
|
|
env_->NowMicros() > expiration_time)) {
|
|
status = Status::TimedOut();
|
|
}
|
|
|
|
uint64_t last_sequence = versions_->LastSequence();
|
|
WriteThread::Writer* last_writer = &w;
|
|
autovector<WriteBatch*> write_batch_group;
|
|
|
|
if (status.ok()) {
|
|
last_batch_group_size_ =
|
|
write_thread_.BuildBatchGroup(&last_writer, &write_batch_group);
|
|
|
|
// Add to log and apply to memtable. We can release the lock
|
|
// during this phase since &w is currently responsible for logging
|
|
// and protects against concurrent loggers and concurrent writes
|
|
// into memtables
|
|
|
|
mutex_.Unlock();
|
|
|
|
if (callback != nullptr) {
|
|
// If this write has a validation callback, check to see if this write
|
|
// is able to be written. Must be called on the write thread.
|
|
status = callback->Callback(this);
|
|
}
|
|
} else {
|
|
mutex_.Unlock();
|
|
}
|
|
|
|
// At this point the mutex is unlocked
|
|
|
|
if (status.ok()) {
|
|
WriteBatch* updates = nullptr;
|
|
if (write_batch_group.size() == 1) {
|
|
updates = write_batch_group[0];
|
|
} else {
|
|
updates = &tmp_batch_;
|
|
for (size_t i = 0; i < write_batch_group.size(); ++i) {
|
|
WriteBatchInternal::Append(updates, write_batch_group[i]);
|
|
}
|
|
}
|
|
|
|
const SequenceNumber current_sequence = last_sequence + 1;
|
|
WriteBatchInternal::SetSequence(updates, current_sequence);
|
|
int my_batch_count = WriteBatchInternal::Count(updates);
|
|
last_sequence += my_batch_count;
|
|
const uint64_t batch_size = WriteBatchInternal::ByteSize(updates);
|
|
// Record statistics
|
|
RecordTick(stats_, NUMBER_KEYS_WRITTEN, my_batch_count);
|
|
RecordTick(stats_, BYTES_WRITTEN, batch_size);
|
|
if (write_options.disableWAL) {
|
|
flush_on_destroy_ = true;
|
|
}
|
|
PERF_TIMER_STOP(write_pre_and_post_process_time);
|
|
|
|
uint64_t log_size = 0;
|
|
if (!write_options.disableWAL) {
|
|
PERF_TIMER_GUARD(write_wal_time);
|
|
Slice log_entry = WriteBatchInternal::Contents(updates);
|
|
status = log_->AddRecord(log_entry);
|
|
total_log_size_ += log_entry.size();
|
|
alive_log_files_.back().AddSize(log_entry.size());
|
|
log_empty_ = false;
|
|
log_size = log_entry.size();
|
|
RecordTick(stats_, WAL_FILE_BYTES, log_size);
|
|
if (status.ok() && write_options.sync) {
|
|
RecordTick(stats_, WAL_FILE_SYNCED);
|
|
StopWatch sw(env_, stats_, WAL_FILE_SYNC_MICROS);
|
|
if (db_options_.use_fsync) {
|
|
status = log_->file()->Fsync();
|
|
} else {
|
|
status = log_->file()->Sync();
|
|
}
|
|
if (status.ok() && !log_dir_synced_) {
|
|
// We only sync WAL directory the first time WAL syncing is
|
|
// requested, so that in case users never turn on WAL sync,
|
|
// we can avoid the disk I/O in the write code path.
|
|
status = directories_.GetWalDir()->Fsync();
|
|
}
|
|
log_dir_synced_ = true;
|
|
}
|
|
}
|
|
if (status.ok()) {
|
|
PERF_TIMER_GUARD(write_memtable_time);
|
|
|
|
status = WriteBatchInternal::InsertInto(
|
|
updates, column_family_memtables_.get(),
|
|
write_options.ignore_missing_column_families, 0, this, false);
|
|
// A non-OK status here indicates iteration failure (either in-memory
|
|
// writebatch corruption (very bad), or the client specified invalid
|
|
// column family). This will later on trigger bg_error_.
|
|
//
|
|
// Note that existing logic was not sound. Any partial failure writing
|
|
// into the memtable would result in a state that some write ops might
|
|
// have succeeded in memtable but Status reports error for all writes.
|
|
|
|
SetTickerCount(stats_, SEQUENCE_NUMBER, last_sequence);
|
|
}
|
|
PERF_TIMER_START(write_pre_and_post_process_time);
|
|
if (updates == &tmp_batch_) {
|
|
tmp_batch_.Clear();
|
|
}
|
|
mutex_.Lock();
|
|
|
|
// internal stats
|
|
default_cf_internal_stats_->AddDBStats(
|
|
InternalStats::BYTES_WRITTEN, batch_size);
|
|
default_cf_internal_stats_->AddDBStats(InternalStats::NUMBER_KEYS_WRITTEN,
|
|
my_batch_count);
|
|
if (!write_options.disableWAL) {
|
|
default_cf_internal_stats_->AddDBStats(
|
|
InternalStats::WAL_FILE_SYNCED, 1);
|
|
default_cf_internal_stats_->AddDBStats(
|
|
InternalStats::WAL_FILE_BYTES, log_size);
|
|
}
|
|
if (status.ok()) {
|
|
versions_->SetLastSequence(last_sequence);
|
|
}
|
|
} else {
|
|
// Operation failed. Make sure sure mutex is held for cleanup code below.
|
|
mutex_.Lock();
|
|
}
|
|
|
|
if (db_options_.paranoid_checks && !status.ok() && !status.IsTimedOut() &&
|
|
!status.IsBusy() && bg_error_.ok()) {
|
|
bg_error_ = status; // stop compaction & fail any further writes
|
|
}
|
|
|
|
mutex_.AssertHeld();
|
|
write_thread_.ExitWriteThread(&w, last_writer, status);
|
|
|
|
mutex_.Unlock();
|
|
|
|
if (status.IsTimedOut()) {
|
|
RecordTick(stats_, WRITE_TIMEDOUT);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
// REQUIRES: mutex_ is held
|
|
// REQUIRES: this thread is currently at the front of the writer queue
|
|
Status DBImpl::DelayWrite(uint64_t num_bytes, uint64_t expiration_time) {
|
|
uint64_t time_delayed = 0;
|
|
bool delayed = false;
|
|
bool timed_out = false;
|
|
{
|
|
StopWatch sw(env_, stats_, WRITE_STALL, &time_delayed);
|
|
bool has_timeout = (expiration_time > 0);
|
|
auto delay = write_controller_.GetDelay(env_, num_bytes);
|
|
if (delay > 0) {
|
|
mutex_.Unlock();
|
|
delayed = true;
|
|
// hopefully we don't have to sleep more than 2 billion microseconds
|
|
TEST_SYNC_POINT("DBImpl::DelayWrite:Sleep");
|
|
if (has_timeout) {
|
|
auto time_now = env_->NowMicros();
|
|
if (time_now + delay >= expiration_time) {
|
|
if (expiration_time > time_now) {
|
|
env_->SleepForMicroseconds(
|
|
static_cast<int>(expiration_time - time_now));
|
|
}
|
|
timed_out = true;
|
|
}
|
|
}
|
|
if (!timed_out) {
|
|
env_->SleepForMicroseconds(static_cast<int>(delay));
|
|
}
|
|
mutex_.Lock();
|
|
}
|
|
|
|
while (!timed_out && bg_error_.ok() && write_controller_.IsStopped()) {
|
|
delayed = true;
|
|
if (has_timeout) {
|
|
TEST_SYNC_POINT("DBImpl::DelayWrite:TimedWait");
|
|
bg_cv_.TimedWait(expiration_time);
|
|
if (env_->NowMicros() > expiration_time) {
|
|
timed_out = true;
|
|
break;
|
|
}
|
|
} else {
|
|
bg_cv_.Wait();
|
|
}
|
|
}
|
|
}
|
|
if (delayed) {
|
|
default_cf_internal_stats_->AddDBStats(InternalStats::WRITE_STALL_MICROS,
|
|
time_delayed);
|
|
RecordTick(stats_, STALL_MICROS, time_delayed);
|
|
}
|
|
|
|
if (timed_out) {
|
|
return Status::TimedOut();
|
|
}
|
|
|
|
return bg_error_;
|
|
}
|
|
|
|
Status DBImpl::ScheduleFlushes(WriteContext* context) {
|
|
ColumnFamilyData* cfd;
|
|
while ((cfd = flush_scheduler_.GetNextColumnFamily()) != nullptr) {
|
|
auto status = SwitchMemtable(cfd, context);
|
|
if (cfd->Unref()) {
|
|
delete cfd;
|
|
}
|
|
if (!status.ok()) {
|
|
return status;
|
|
}
|
|
}
|
|
return Status::OK();
|
|
}
|
|
|
|
// REQUIRES: mutex_ is held
|
|
// REQUIRES: this thread is currently at the front of the writer queue
|
|
Status DBImpl::SwitchMemtable(ColumnFamilyData* cfd, WriteContext* context) {
|
|
mutex_.AssertHeld();
|
|
unique_ptr<WritableFile> lfile;
|
|
log::Writer* new_log = nullptr;
|
|
MemTable* new_mem = nullptr;
|
|
|
|
// Attempt to switch to a new memtable and trigger flush of old.
|
|
// Do this without holding the dbmutex lock.
|
|
assert(versions_->prev_log_number() == 0);
|
|
bool creating_new_log = !log_empty_;
|
|
uint64_t new_log_number =
|
|
creating_new_log ? versions_->NewFileNumber() : logfile_number_;
|
|
SuperVersion* new_superversion = nullptr;
|
|
const MutableCFOptions mutable_cf_options = *cfd->GetLatestMutableCFOptions();
|
|
mutex_.Unlock();
|
|
Status s;
|
|
{
|
|
if (creating_new_log) {
|
|
s = env_->NewWritableFile(
|
|
LogFileName(db_options_.wal_dir, new_log_number), &lfile,
|
|
env_->OptimizeForLogWrite(env_options_, db_options_));
|
|
if (s.ok()) {
|
|
// Our final size should be less than write_buffer_size
|
|
// (compression, etc) but err on the side of caution.
|
|
lfile->SetPreallocationBlockSize(
|
|
1.1 * mutable_cf_options.write_buffer_size);
|
|
new_log = new log::Writer(std::move(lfile));
|
|
log_dir_synced_ = false;
|
|
}
|
|
}
|
|
|
|
if (s.ok()) {
|
|
SequenceNumber seq = versions_->LastSequence();
|
|
new_mem = cfd->ConstructNewMemtable(mutable_cf_options, seq);
|
|
new_superversion = new SuperVersion();
|
|
}
|
|
}
|
|
Log(InfoLogLevel::DEBUG_LEVEL, db_options_.info_log,
|
|
"[%s] New memtable created with log file: #%" PRIu64 "\n",
|
|
cfd->GetName().c_str(), new_log_number);
|
|
mutex_.Lock();
|
|
if (!s.ok()) {
|
|
// how do we fail if we're not creating new log?
|
|
assert(creating_new_log);
|
|
assert(!new_mem);
|
|
assert(!new_log);
|
|
return s;
|
|
}
|
|
if (creating_new_log) {
|
|
logfile_number_ = new_log_number;
|
|
assert(new_log != nullptr);
|
|
logs_to_free_.push_back(log_.release());
|
|
log_.reset(new_log);
|
|
log_empty_ = true;
|
|
alive_log_files_.push_back(LogFileNumberSize(logfile_number_));
|
|
for (auto loop_cfd : *versions_->GetColumnFamilySet()) {
|
|
// all this is just optimization to delete logs that
|
|
// are no longer needed -- if CF is empty, that means it
|
|
// doesn't need that particular log to stay alive, so we just
|
|
// advance the log number. no need to persist this in the manifest
|
|
if (loop_cfd->mem()->GetFirstSequenceNumber() == 0 &&
|
|
loop_cfd->imm()->NumNotFlushed() == 0) {
|
|
loop_cfd->SetLogNumber(logfile_number_);
|
|
}
|
|
}
|
|
}
|
|
cfd->mem()->SetNextLogNumber(logfile_number_);
|
|
cfd->imm()->Add(cfd->mem(), &context->memtables_to_free_);
|
|
new_mem->Ref();
|
|
cfd->SetMemtable(new_mem);
|
|
context->superversions_to_free_.push_back(InstallSuperVersionAndScheduleWork(
|
|
cfd, new_superversion, mutable_cf_options));
|
|
return s;
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
Status DBImpl::GetPropertiesOfAllTables(ColumnFamilyHandle* column_family,
|
|
TablePropertiesCollection* props) {
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
|
|
// Increment the ref count
|
|
mutex_.Lock();
|
|
auto version = cfd->current();
|
|
version->Ref();
|
|
mutex_.Unlock();
|
|
|
|
auto s = version->GetPropertiesOfAllTables(props);
|
|
|
|
// Decrement the ref count
|
|
mutex_.Lock();
|
|
version->Unref();
|
|
mutex_.Unlock();
|
|
|
|
return s;
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
const std::string& DBImpl::GetName() const {
|
|
return dbname_;
|
|
}
|
|
|
|
Env* DBImpl::GetEnv() const {
|
|
return env_;
|
|
}
|
|
|
|
const Options& DBImpl::GetOptions(ColumnFamilyHandle* column_family) const {
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
return *cfh->cfd()->options();
|
|
}
|
|
|
|
const DBOptions& DBImpl::GetDBOptions() const { return db_options_; }
|
|
|
|
bool DBImpl::GetProperty(ColumnFamilyHandle* column_family,
|
|
const Slice& property, std::string* value) {
|
|
bool is_int_property = false;
|
|
bool need_out_of_mutex = false;
|
|
DBPropertyType property_type =
|
|
GetPropertyType(property, &is_int_property, &need_out_of_mutex);
|
|
|
|
value->clear();
|
|
if (is_int_property) {
|
|
uint64_t int_value;
|
|
bool ret_value = GetIntPropertyInternal(column_family, property_type,
|
|
need_out_of_mutex, &int_value);
|
|
if (ret_value) {
|
|
*value = ToString(int_value);
|
|
}
|
|
return ret_value;
|
|
} else {
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
InstrumentedMutexLock l(&mutex_);
|
|
return cfd->internal_stats()->GetStringProperty(property_type, property,
|
|
value);
|
|
}
|
|
}
|
|
|
|
bool DBImpl::GetIntProperty(ColumnFamilyHandle* column_family,
|
|
const Slice& property, uint64_t* value) {
|
|
bool is_int_property = false;
|
|
bool need_out_of_mutex = false;
|
|
DBPropertyType property_type =
|
|
GetPropertyType(property, &is_int_property, &need_out_of_mutex);
|
|
if (!is_int_property) {
|
|
return false;
|
|
}
|
|
return GetIntPropertyInternal(column_family, property_type, need_out_of_mutex,
|
|
value);
|
|
}
|
|
|
|
bool DBImpl::GetIntPropertyInternal(ColumnFamilyHandle* column_family,
|
|
DBPropertyType property_type,
|
|
bool need_out_of_mutex, uint64_t* value) {
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
|
|
if (!need_out_of_mutex) {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
return cfd->internal_stats()->GetIntProperty(property_type, value, this);
|
|
} else {
|
|
SuperVersion* sv = GetAndRefSuperVersion(cfd);
|
|
|
|
bool ret = cfd->internal_stats()->GetIntPropertyOutOfMutex(
|
|
property_type, sv->current, value);
|
|
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
SuperVersion* DBImpl::GetAndRefSuperVersion(ColumnFamilyData* cfd) {
|
|
// TODO(ljin): consider using GetReferencedSuperVersion() directly
|
|
return cfd->GetThreadLocalSuperVersion(&mutex_);
|
|
}
|
|
|
|
// REQUIRED: this function should only be called on the write thread or if the
|
|
// mutex is held.
|
|
SuperVersion* DBImpl::GetAndRefSuperVersion(uint32_t column_family_id) {
|
|
auto column_family_set = versions_->GetColumnFamilySet();
|
|
auto cfd = column_family_set->GetColumnFamily(column_family_id);
|
|
if (!cfd) {
|
|
return nullptr;
|
|
}
|
|
|
|
return GetAndRefSuperVersion(cfd);
|
|
}
|
|
|
|
void DBImpl::ReturnAndCleanupSuperVersion(ColumnFamilyData* cfd,
|
|
SuperVersion* sv) {
|
|
bool unref_sv = !cfd->ReturnThreadLocalSuperVersion(sv);
|
|
|
|
if (unref_sv) {
|
|
// Release SuperVersion
|
|
if (sv->Unref()) {
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
sv->Cleanup();
|
|
}
|
|
delete sv;
|
|
RecordTick(stats_, NUMBER_SUPERVERSION_CLEANUPS);
|
|
}
|
|
RecordTick(stats_, NUMBER_SUPERVERSION_RELEASES);
|
|
}
|
|
}
|
|
|
|
// REQUIRED: this function should only be called on the write thread.
|
|
void DBImpl::ReturnAndCleanupSuperVersion(uint32_t column_family_id,
|
|
SuperVersion* sv) {
|
|
auto column_family_set = versions_->GetColumnFamilySet();
|
|
auto cfd = column_family_set->GetColumnFamily(column_family_id);
|
|
|
|
// If SuperVersion is held, and we successfully fetched a cfd using
|
|
// GetAndRefSuperVersion(), it must still exist.
|
|
assert(cfd != nullptr);
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
}
|
|
|
|
// REQUIRED: this function should only be called on the write thread or if the
|
|
// mutex is held.
|
|
ColumnFamilyHandle* DBImpl::GetColumnFamilyHandle(uint32_t column_family_id) {
|
|
ColumnFamilyMemTables* cf_memtables = column_family_memtables_.get();
|
|
|
|
if (!cf_memtables->Seek(column_family_id)) {
|
|
return nullptr;
|
|
}
|
|
|
|
return cf_memtables->GetColumnFamilyHandle();
|
|
}
|
|
|
|
void DBImpl::GetApproximateSizes(ColumnFamilyHandle* column_family,
|
|
const Range* range, int n, uint64_t* sizes,
|
|
bool include_memtable) {
|
|
Version* v;
|
|
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
SuperVersion* sv = GetAndRefSuperVersion(cfd);
|
|
v = sv->current;
|
|
|
|
for (int i = 0; i < n; i++) {
|
|
// Convert user_key into a corresponding internal key.
|
|
InternalKey k1(range[i].start, kMaxSequenceNumber, kValueTypeForSeek);
|
|
InternalKey k2(range[i].limit, kMaxSequenceNumber, kValueTypeForSeek);
|
|
sizes[i] = versions_->ApproximateSize(v, k1.Encode(), k2.Encode());
|
|
if (include_memtable) {
|
|
sizes[i] += sv->mem->ApproximateSize(k1.Encode(), k2.Encode());
|
|
sizes[i] += sv->imm->ApproximateSize(k1.Encode(), k2.Encode());
|
|
}
|
|
}
|
|
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
}
|
|
|
|
std::list<uint64_t>::iterator
|
|
DBImpl::CaptureCurrentFileNumberInPendingOutputs() {
|
|
// We need to remember the iterator of our insert, because after the
|
|
// background job is done, we need to remove that element from
|
|
// pending_outputs_.
|
|
pending_outputs_.push_back(versions_->current_next_file_number());
|
|
auto pending_outputs_inserted_elem = pending_outputs_.end();
|
|
--pending_outputs_inserted_elem;
|
|
return pending_outputs_inserted_elem;
|
|
}
|
|
|
|
void DBImpl::ReleaseFileNumberFromPendingOutputs(
|
|
std::list<uint64_t>::iterator v) {
|
|
pending_outputs_.erase(v);
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
Status DBImpl::GetUpdatesSince(
|
|
SequenceNumber seq, unique_ptr<TransactionLogIterator>* iter,
|
|
const TransactionLogIterator::ReadOptions& read_options) {
|
|
|
|
RecordTick(stats_, GET_UPDATES_SINCE_CALLS);
|
|
if (seq > versions_->LastSequence()) {
|
|
return Status::NotFound("Requested sequence not yet written in the db");
|
|
}
|
|
return wal_manager_.GetUpdatesSince(seq, iter, read_options, versions_.get());
|
|
}
|
|
|
|
Status DBImpl::DeleteFile(std::string name) {
|
|
uint64_t number;
|
|
FileType type;
|
|
WalFileType log_type;
|
|
if (!ParseFileName(name, &number, &type, &log_type) ||
|
|
(type != kTableFile && type != kLogFile)) {
|
|
Log(InfoLogLevel::ERROR_LEVEL, db_options_.info_log,
|
|
"DeleteFile %s failed.\n", name.c_str());
|
|
return Status::InvalidArgument("Invalid file name");
|
|
}
|
|
|
|
Status status;
|
|
if (type == kLogFile) {
|
|
// Only allow deleting archived log files
|
|
if (log_type != kArchivedLogFile) {
|
|
Log(InfoLogLevel::ERROR_LEVEL, db_options_.info_log,
|
|
"DeleteFile %s failed - not archived log.\n",
|
|
name.c_str());
|
|
return Status::NotSupported("Delete only supported for archived logs");
|
|
}
|
|
status = env_->DeleteFile(db_options_.wal_dir + "/" + name.c_str());
|
|
if (!status.ok()) {
|
|
Log(InfoLogLevel::ERROR_LEVEL, db_options_.info_log,
|
|
"DeleteFile %s failed -- %s.\n",
|
|
name.c_str(), status.ToString().c_str());
|
|
}
|
|
return status;
|
|
}
|
|
|
|
int level;
|
|
FileMetaData* metadata;
|
|
ColumnFamilyData* cfd;
|
|
VersionEdit edit;
|
|
JobContext job_context(next_job_id_.fetch_add(1), true);
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
status = versions_->GetMetadataForFile(number, &level, &metadata, &cfd);
|
|
if (!status.ok()) {
|
|
Log(InfoLogLevel::WARN_LEVEL, db_options_.info_log,
|
|
"DeleteFile %s failed. File not found\n", name.c_str());
|
|
job_context.Clean();
|
|
return Status::InvalidArgument("File not found");
|
|
}
|
|
assert(level < cfd->NumberLevels());
|
|
|
|
// If the file is being compacted no need to delete.
|
|
if (metadata->being_compacted) {
|
|
Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
|
|
"DeleteFile %s Skipped. File about to be compacted\n", name.c_str());
|
|
job_context.Clean();
|
|
return Status::OK();
|
|
}
|
|
|
|
// Only the files in the last level can be deleted externally.
|
|
// This is to make sure that any deletion tombstones are not
|
|
// lost. Check that the level passed is the last level.
|
|
auto* vstoreage = cfd->current()->storage_info();
|
|
for (int i = level + 1; i < cfd->NumberLevels(); i++) {
|
|
if (vstoreage->NumLevelFiles(i) != 0) {
|
|
Log(InfoLogLevel::WARN_LEVEL, db_options_.info_log,
|
|
"DeleteFile %s FAILED. File not in last level\n", name.c_str());
|
|
job_context.Clean();
|
|
return Status::InvalidArgument("File not in last level");
|
|
}
|
|
}
|
|
// if level == 0, it has to be the oldest file
|
|
if (level == 0 &&
|
|
vstoreage->LevelFiles(0).back()->fd.GetNumber() != number) {
|
|
Log(InfoLogLevel::WARN_LEVEL, db_options_.info_log,
|
|
"DeleteFile %s failed ---"
|
|
" target file in level 0 must be the oldest.", name.c_str());
|
|
job_context.Clean();
|
|
return Status::InvalidArgument("File in level 0, but not oldest");
|
|
}
|
|
edit.SetColumnFamily(cfd->GetID());
|
|
edit.DeleteFile(level, number);
|
|
status = versions_->LogAndApply(cfd, *cfd->GetLatestMutableCFOptions(),
|
|
&edit, &mutex_, directories_.GetDbDir());
|
|
if (status.ok()) {
|
|
InstallSuperVersionAndScheduleWorkWrapper(
|
|
cfd, &job_context, *cfd->GetLatestMutableCFOptions());
|
|
}
|
|
FindObsoleteFiles(&job_context, false);
|
|
} // lock released here
|
|
|
|
LogFlush(db_options_.info_log);
|
|
// remove files outside the db-lock
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
// Call PurgeObsoleteFiles() without holding mutex.
|
|
PurgeObsoleteFiles(job_context);
|
|
}
|
|
job_context.Clean();
|
|
return status;
|
|
}
|
|
|
|
void DBImpl::GetLiveFilesMetaData(std::vector<LiveFileMetaData>* metadata) {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
versions_->GetLiveFilesMetaData(metadata);
|
|
}
|
|
|
|
void DBImpl::GetColumnFamilyMetaData(
|
|
ColumnFamilyHandle* column_family,
|
|
ColumnFamilyMetaData* cf_meta) {
|
|
assert(column_family);
|
|
auto* cfd = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family)->cfd();
|
|
auto* sv = GetAndRefSuperVersion(cfd);
|
|
sv->current->GetColumnFamilyMetaData(cf_meta);
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
}
|
|
|
|
#endif // ROCKSDB_LITE
|
|
|
|
Status DBImpl::CheckConsistency() {
|
|
mutex_.AssertHeld();
|
|
std::vector<LiveFileMetaData> metadata;
|
|
versions_->GetLiveFilesMetaData(&metadata);
|
|
|
|
std::string corruption_messages;
|
|
for (const auto& md : metadata) {
|
|
// md.name has a leading "/".
|
|
std::string file_path = md.db_path + md.name;
|
|
|
|
uint64_t fsize = 0;
|
|
Status s = env_->GetFileSize(file_path, &fsize);
|
|
if (!s.ok()) {
|
|
corruption_messages +=
|
|
"Can't access " + md.name + ": " + s.ToString() + "\n";
|
|
} else if (fsize != md.size) {
|
|
corruption_messages += "Sst file size mismatch: " + file_path +
|
|
". Size recorded in manifest " +
|
|
ToString(md.size) + ", actual size " +
|
|
ToString(fsize) + "\n";
|
|
}
|
|
}
|
|
if (corruption_messages.size() == 0) {
|
|
return Status::OK();
|
|
} else {
|
|
return Status::Corruption(corruption_messages);
|
|
}
|
|
}
|
|
|
|
Status DBImpl::GetDbIdentity(std::string& identity) const {
|
|
std::string idfilename = IdentityFileName(dbname_);
|
|
unique_ptr<SequentialFile> idfile;
|
|
const EnvOptions soptions;
|
|
Status s = env_->NewSequentialFile(idfilename, &idfile, soptions);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
uint64_t file_size;
|
|
s = env_->GetFileSize(idfilename, &file_size);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
char buffer[file_size];
|
|
Slice id;
|
|
s = idfile->Read(static_cast<size_t>(file_size), &id, buffer);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
identity.assign(id.ToString());
|
|
// If last character is '\n' remove it from identity
|
|
if (identity.size() > 0 && identity.back() == '\n') {
|
|
identity.pop_back();
|
|
}
|
|
return s;
|
|
}
|
|
|
|
// Default implementations of convenience methods that subclasses of DB
|
|
// can call if they wish
|
|
Status DB::Put(const WriteOptions& opt, ColumnFamilyHandle* column_family,
|
|
const Slice& key, const Slice& value) {
|
|
// Pre-allocate size of write batch conservatively.
|
|
// 8 bytes are taken by header, 4 bytes for count, 1 byte for type,
|
|
// and we allocate 11 extra bytes for key length, as well as value length.
|
|
WriteBatch batch(key.size() + value.size() + 24);
|
|
batch.Put(column_family, key, value);
|
|
return Write(opt, &batch);
|
|
}
|
|
|
|
Status DB::Delete(const WriteOptions& opt, ColumnFamilyHandle* column_family,
|
|
const Slice& key) {
|
|
WriteBatch batch;
|
|
batch.Delete(column_family, key);
|
|
return Write(opt, &batch);
|
|
}
|
|
|
|
Status DB::Merge(const WriteOptions& opt, ColumnFamilyHandle* column_family,
|
|
const Slice& key, const Slice& value) {
|
|
WriteBatch batch;
|
|
batch.Merge(column_family, key, value);
|
|
return Write(opt, &batch);
|
|
}
|
|
|
|
// Default implementation -- returns not supported status
|
|
Status DB::CreateColumnFamily(const ColumnFamilyOptions& cf_options,
|
|
const std::string& column_family_name,
|
|
ColumnFamilyHandle** handle) {
|
|
return Status::NotSupported("");
|
|
}
|
|
Status DB::DropColumnFamily(ColumnFamilyHandle* column_family) {
|
|
return Status::NotSupported("");
|
|
}
|
|
|
|
DB::~DB() { }
|
|
|
|
Status DB::Open(const Options& options, const std::string& dbname, DB** dbptr) {
|
|
DBOptions db_options(options);
|
|
ColumnFamilyOptions cf_options(options);
|
|
std::vector<ColumnFamilyDescriptor> column_families;
|
|
column_families.push_back(
|
|
ColumnFamilyDescriptor(kDefaultColumnFamilyName, cf_options));
|
|
std::vector<ColumnFamilyHandle*> handles;
|
|
Status s = DB::Open(db_options, dbname, column_families, &handles, dbptr);
|
|
if (s.ok()) {
|
|
assert(handles.size() == 1);
|
|
// i can delete the handle since DBImpl is always holding a reference to
|
|
// default column family
|
|
delete handles[0];
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DB::Open(const DBOptions& db_options, const std::string& dbname,
|
|
const std::vector<ColumnFamilyDescriptor>& column_families,
|
|
std::vector<ColumnFamilyHandle*>* handles, DB** dbptr) {
|
|
Status s = SanitizeOptionsByTable(db_options, column_families);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
for (auto& cfd : column_families) {
|
|
s = CheckCompressionSupported(cfd.options);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
if (db_options.db_paths.size() > 1) {
|
|
if ((cfd.options.compaction_style != kCompactionStyleUniversal) &&
|
|
(cfd.options.compaction_style != kCompactionStyleLevel)) {
|
|
return Status::NotSupported(
|
|
"More than one DB paths are only supported in "
|
|
"universal and level compaction styles. ");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (db_options.db_paths.size() > 4) {
|
|
return Status::NotSupported(
|
|
"More than four DB paths are not supported yet. ");
|
|
}
|
|
|
|
*dbptr = nullptr;
|
|
handles->clear();
|
|
|
|
size_t max_write_buffer_size = 0;
|
|
for (auto cf : column_families) {
|
|
max_write_buffer_size =
|
|
std::max(max_write_buffer_size, cf.options.write_buffer_size);
|
|
}
|
|
|
|
DBImpl* impl = new DBImpl(db_options, dbname);
|
|
s = impl->env_->CreateDirIfMissing(impl->db_options_.wal_dir);
|
|
if (s.ok()) {
|
|
for (auto db_path : impl->db_options_.db_paths) {
|
|
s = impl->env_->CreateDirIfMissing(db_path.path);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!s.ok()) {
|
|
delete impl;
|
|
return s;
|
|
}
|
|
|
|
s = impl->CreateArchivalDirectory();
|
|
if (!s.ok()) {
|
|
delete impl;
|
|
return s;
|
|
}
|
|
impl->mutex_.Lock();
|
|
// Handles create_if_missing, error_if_exists
|
|
s = impl->Recover(column_families);
|
|
if (s.ok()) {
|
|
uint64_t new_log_number = impl->versions_->NewFileNumber();
|
|
unique_ptr<WritableFile> lfile;
|
|
EnvOptions soptions(db_options);
|
|
s = impl->db_options_.env->NewWritableFile(
|
|
LogFileName(impl->db_options_.wal_dir, new_log_number), &lfile,
|
|
impl->db_options_.env->OptimizeForLogWrite(soptions,
|
|
impl->db_options_));
|
|
if (s.ok()) {
|
|
lfile->SetPreallocationBlockSize(1.1 * max_write_buffer_size);
|
|
impl->logfile_number_ = new_log_number;
|
|
impl->log_.reset(new log::Writer(std::move(lfile)));
|
|
|
|
// set column family handles
|
|
for (auto cf : column_families) {
|
|
auto cfd =
|
|
impl->versions_->GetColumnFamilySet()->GetColumnFamily(cf.name);
|
|
if (cfd != nullptr) {
|
|
handles->push_back(
|
|
new ColumnFamilyHandleImpl(cfd, impl, &impl->mutex_));
|
|
impl->NewThreadStatusCfInfo(cfd);
|
|
} else {
|
|
if (db_options.create_missing_column_families) {
|
|
// missing column family, create it
|
|
ColumnFamilyHandle* handle;
|
|
impl->mutex_.Unlock();
|
|
s = impl->CreateColumnFamily(cf.options, cf.name, &handle);
|
|
impl->mutex_.Lock();
|
|
if (s.ok()) {
|
|
handles->push_back(handle);
|
|
} else {
|
|
break;
|
|
}
|
|
} else {
|
|
s = Status::InvalidArgument("Column family not found: ", cf.name);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (s.ok()) {
|
|
for (auto cfd : *impl->versions_->GetColumnFamilySet()) {
|
|
delete impl->InstallSuperVersionAndScheduleWork(
|
|
cfd, nullptr, *cfd->GetLatestMutableCFOptions());
|
|
}
|
|
impl->alive_log_files_.push_back(
|
|
DBImpl::LogFileNumberSize(impl->logfile_number_));
|
|
impl->DeleteObsoleteFiles();
|
|
s = impl->directories_.GetDbDir()->Fsync();
|
|
}
|
|
}
|
|
|
|
if (s.ok()) {
|
|
for (auto cfd : *impl->versions_->GetColumnFamilySet()) {
|
|
if (cfd->ioptions()->compaction_style == kCompactionStyleFIFO) {
|
|
auto* vstorage = cfd->current()->storage_info();
|
|
for (int i = 1; i < vstorage->num_levels(); ++i) {
|
|
int num_files = vstorage->NumLevelFiles(i);
|
|
if (num_files > 0) {
|
|
s = Status::InvalidArgument(
|
|
"Not all files are at level 0. Cannot "
|
|
"open with FIFO compaction style.");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!cfd->mem()->IsSnapshotSupported()) {
|
|
impl->is_snapshot_supported_ = false;
|
|
}
|
|
if (cfd->ioptions()->merge_operator != nullptr &&
|
|
!cfd->mem()->IsMergeOperatorSupported()) {
|
|
s = Status::InvalidArgument(
|
|
"The memtable of column family %s does not support merge operator "
|
|
"its options.merge_operator is non-null", cfd->GetName().c_str());
|
|
}
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
impl->mutex_.Unlock();
|
|
|
|
if (s.ok()) {
|
|
impl->opened_successfully_ = true;
|
|
Log(InfoLogLevel::INFO_LEVEL, impl->db_options_.info_log, "DB pointer %p",
|
|
impl);
|
|
*dbptr = impl;
|
|
} else {
|
|
for (auto* h : *handles) {
|
|
delete h;
|
|
}
|
|
handles->clear();
|
|
delete impl;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DB::ListColumnFamilies(const DBOptions& db_options,
|
|
const std::string& name,
|
|
std::vector<std::string>* column_families) {
|
|
return VersionSet::ListColumnFamilies(column_families, name, db_options.env);
|
|
}
|
|
|
|
Snapshot::~Snapshot() {
|
|
}
|
|
|
|
Status DestroyDB(const std::string& dbname, const Options& options) {
|
|
const InternalKeyComparator comparator(options.comparator);
|
|
const Options& soptions(SanitizeOptions(dbname, &comparator, options));
|
|
Env* env = soptions.env;
|
|
std::vector<std::string> filenames;
|
|
|
|
// Ignore error in case directory does not exist
|
|
env->GetChildren(dbname, &filenames);
|
|
|
|
FileLock* lock;
|
|
const std::string lockname = LockFileName(dbname);
|
|
Status result = env->LockFile(lockname, &lock);
|
|
if (result.ok()) {
|
|
uint64_t number;
|
|
FileType type;
|
|
InfoLogPrefix info_log_prefix(!options.db_log_dir.empty(), dbname);
|
|
for (size_t i = 0; i < filenames.size(); i++) {
|
|
if (ParseFileName(filenames[i], &number, info_log_prefix.prefix, &type) &&
|
|
type != kDBLockFile) { // Lock file will be deleted at end
|
|
Status del;
|
|
if (type == kMetaDatabase) {
|
|
del = DestroyDB(dbname + "/" + filenames[i], options);
|
|
} else {
|
|
del = env->DeleteFile(dbname + "/" + filenames[i]);
|
|
}
|
|
if (result.ok() && !del.ok()) {
|
|
result = del;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (auto& db_path : options.db_paths) {
|
|
env->GetChildren(db_path.path, &filenames);
|
|
for (size_t i = 0; i < filenames.size(); i++) {
|
|
if (ParseFileName(filenames[i], &number, &type) &&
|
|
type == kTableFile) { // Lock file will be deleted at end
|
|
Status del = env->DeleteFile(db_path.path + "/" + filenames[i]);
|
|
if (result.ok() && !del.ok()) {
|
|
result = del;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
std::vector<std::string> walDirFiles;
|
|
std::string archivedir = ArchivalDirectory(dbname);
|
|
if (dbname != soptions.wal_dir) {
|
|
env->GetChildren(soptions.wal_dir, &walDirFiles);
|
|
archivedir = ArchivalDirectory(soptions.wal_dir);
|
|
}
|
|
|
|
// Delete log files in the WAL dir
|
|
for (const auto& file : walDirFiles) {
|
|
if (ParseFileName(file, &number, &type) && type == kLogFile) {
|
|
Status del = env->DeleteFile(soptions.wal_dir + "/" + file);
|
|
if (result.ok() && !del.ok()) {
|
|
result = del;
|
|
}
|
|
}
|
|
}
|
|
|
|
std::vector<std::string> archiveFiles;
|
|
env->GetChildren(archivedir, &archiveFiles);
|
|
// Delete archival files.
|
|
for (size_t i = 0; i < archiveFiles.size(); ++i) {
|
|
if (ParseFileName(archiveFiles[i], &number, &type) &&
|
|
type == kLogFile) {
|
|
Status del = env->DeleteFile(archivedir + "/" + archiveFiles[i]);
|
|
if (result.ok() && !del.ok()) {
|
|
result = del;
|
|
}
|
|
}
|
|
}
|
|
// ignore case where no archival directory is present.
|
|
env->DeleteDir(archivedir);
|
|
|
|
env->UnlockFile(lock); // Ignore error since state is already gone
|
|
env->DeleteFile(lockname);
|
|
env->DeleteDir(dbname); // Ignore error in case dir contains other files
|
|
env->DeleteDir(soptions.wal_dir);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
#if ROCKSDB_USING_THREAD_STATUS
|
|
|
|
void DBImpl::NewThreadStatusCfInfo(
|
|
ColumnFamilyData* cfd) const {
|
|
if (db_options_.enable_thread_tracking) {
|
|
ThreadStatusUtil::NewColumnFamilyInfo(this, cfd);
|
|
}
|
|
}
|
|
|
|
void DBImpl::EraseThreadStatusCfInfo(
|
|
ColumnFamilyData* cfd) const {
|
|
if (db_options_.enable_thread_tracking) {
|
|
ThreadStatusUtil::EraseColumnFamilyInfo(cfd);
|
|
}
|
|
}
|
|
|
|
void DBImpl::EraseThreadStatusDbInfo() const {
|
|
if (db_options_.enable_thread_tracking) {
|
|
ThreadStatusUtil::EraseDatabaseInfo(this);
|
|
}
|
|
}
|
|
|
|
#else
|
|
void DBImpl::NewThreadStatusCfInfo(
|
|
ColumnFamilyData* cfd) const {
|
|
}
|
|
|
|
void DBImpl::EraseThreadStatusCfInfo(
|
|
ColumnFamilyData* cfd) const {
|
|
}
|
|
|
|
void DBImpl::EraseThreadStatusDbInfo() const {
|
|
}
|
|
#endif // ROCKSDB_USING_THREAD_STATUS
|
|
|
|
//
|
|
// A global method that can dump out the build version
|
|
void DumpRocksDBBuildVersion(Logger * log) {
|
|
#if !defined(IOS_CROSS_COMPILE)
|
|
// if we compile with Xcode, we don't run build_detect_vesion, so we don't
|
|
// generate util/build_version.cc
|
|
Warn(log,
|
|
"RocksDB version: %d.%d.%d\n", ROCKSDB_MAJOR, ROCKSDB_MINOR,
|
|
ROCKSDB_PATCH);
|
|
Warn(log, "Git sha %s", rocksdb_build_git_sha);
|
|
Warn(log, "Compile date %s", rocksdb_build_compile_date);
|
|
#endif
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
SequenceNumber DBImpl::GetEarliestMemTableSequenceNumber(SuperVersion* sv,
|
|
bool include_history) {
|
|
// Find the earliest sequence number that we know we can rely on reading
|
|
// from the memtable without needing to check sst files.
|
|
SequenceNumber earliest_seq =
|
|
sv->imm->GetEarliestSequenceNumber(include_history);
|
|
if (earliest_seq == kMaxSequenceNumber) {
|
|
earliest_seq = sv->mem->GetEarliestSequenceNumber();
|
|
}
|
|
assert(sv->mem->GetEarliestSequenceNumber() >= earliest_seq);
|
|
|
|
return earliest_seq;
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
Status DBImpl::GetLatestSequenceForKeyFromMemtable(SuperVersion* sv,
|
|
const Slice& key,
|
|
SequenceNumber* seq) {
|
|
Status s;
|
|
std::string value;
|
|
MergeContext merge_context;
|
|
|
|
SequenceNumber current_seq = versions_->LastSequence();
|
|
LookupKey lkey(key, current_seq);
|
|
|
|
*seq = kMaxSequenceNumber;
|
|
|
|
// Check if there is a record for this key in the latest memtable
|
|
sv->mem->Get(lkey, &value, &s, &merge_context, seq);
|
|
|
|
if (!(s.ok() || s.IsNotFound() || s.IsMergeInProgress())) {
|
|
// unexpected error reading memtable.
|
|
Log(InfoLogLevel::ERROR_LEVEL, db_options_.info_log,
|
|
"Unexpected status returned from MemTable::Get: %s\n",
|
|
s.ToString().c_str());
|
|
|
|
return s;
|
|
}
|
|
|
|
if (*seq != kMaxSequenceNumber) {
|
|
// Found a sequence number, no need to check immutable memtables
|
|
return Status::OK();
|
|
}
|
|
|
|
// Check if there is a record for this key in the immutable memtables
|
|
sv->imm->Get(lkey, &value, &s, &merge_context, seq);
|
|
|
|
if (!(s.ok() || s.IsNotFound() || s.IsMergeInProgress())) {
|
|
// unexpected error reading memtable.
|
|
Log(InfoLogLevel::ERROR_LEVEL, db_options_.info_log,
|
|
"Unexpected status returned from MemTableList::Get: %s\n",
|
|
s.ToString().c_str());
|
|
|
|
return s;
|
|
}
|
|
|
|
if (*seq != kMaxSequenceNumber) {
|
|
// Found a sequence number, no need to check memtable history
|
|
return Status::OK();
|
|
}
|
|
|
|
// Check if there is a record for this key in the immutable memtables
|
|
sv->imm->GetFromHistory(lkey, &value, &s, &merge_context, seq);
|
|
|
|
if (!(s.ok() || s.IsNotFound() || s.IsMergeInProgress())) {
|
|
// unexpected error reading memtable.
|
|
Log(InfoLogLevel::ERROR_LEVEL, db_options_.info_log,
|
|
"Unexpected status returned from MemTableList::GetFromHistory: %s\n",
|
|
s.ToString().c_str());
|
|
|
|
return s;
|
|
}
|
|
|
|
return Status::OK();
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
} // namespace rocksdb
|