cc24ac14eb
Summary:
This diff contains following changes:
1. Replace `FSSequentialFile` pointer with `FSSequentialFilePtr` object that wraps `FSSequentialFile` pointer in `SequenceFileReader`.
Objective: If tracing is enabled, `FSSequentialFilePtr` returns `FSSequentialFileTracingWrapper` pointer that includes all necessary information in `IORecord` and calls underlying FileSystem and invokes `IOTracer` to dump that record in a binary file. If tracing is disabled then, underlying `FileSystem` pointer is returned directly. `FSSequentialFilePtr` wrapper class is added to bypass the `FSSequentialFileTracingWrapper` when tracing is disabled.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/7190
Test Plan:
make check -j64
COMPILE_WITH_TSAN=1 make check -j64
Reviewed By: anand1976
Differential Revision: D23059616
Pulled By: akankshamahajan15
fbshipit-source-id: 1564b94dd1297cd0fbfe2ed5c9cc3e20f7395301
676 lines
25 KiB
C++
676 lines
25 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#include "db/db_impl/db_impl_secondary.h"
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#include <cinttypes>
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#include "db/arena_wrapped_db_iter.h"
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#include "db/merge_context.h"
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#include "logging/auto_roll_logger.h"
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#include "monitoring/perf_context_imp.h"
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#include "util/cast_util.h"
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namespace ROCKSDB_NAMESPACE {
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#ifndef ROCKSDB_LITE
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DBImplSecondary::DBImplSecondary(const DBOptions& db_options,
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const std::string& dbname)
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: DBImpl(db_options, dbname) {
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ROCKS_LOG_INFO(immutable_db_options_.info_log,
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"Opening the db in secondary mode");
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LogFlush(immutable_db_options_.info_log);
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}
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DBImplSecondary::~DBImplSecondary() {}
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Status DBImplSecondary::Recover(
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const std::vector<ColumnFamilyDescriptor>& column_families,
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bool /*readonly*/, bool /*error_if_log_file_exist*/,
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bool /*error_if_data_exists_in_logs*/, uint64_t*) {
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mutex_.AssertHeld();
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JobContext job_context(0);
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Status s;
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s = static_cast<ReactiveVersionSet*>(versions_.get())
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->Recover(column_families, &manifest_reader_, &manifest_reporter_,
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&manifest_reader_status_);
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if (!s.ok()) {
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return s;
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}
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if (immutable_db_options_.paranoid_checks && s.ok()) {
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s = CheckConsistency();
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}
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// Initial max_total_in_memory_state_ before recovery logs.
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max_total_in_memory_state_ = 0;
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for (auto cfd : *versions_->GetColumnFamilySet()) {
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auto* mutable_cf_options = cfd->GetLatestMutableCFOptions();
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max_total_in_memory_state_ += mutable_cf_options->write_buffer_size *
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mutable_cf_options->max_write_buffer_number;
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}
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if (s.ok()) {
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default_cf_handle_ = new ColumnFamilyHandleImpl(
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versions_->GetColumnFamilySet()->GetDefault(), this, &mutex_);
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default_cf_internal_stats_ = default_cf_handle_->cfd()->internal_stats();
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single_column_family_mode_ =
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versions_->GetColumnFamilySet()->NumberOfColumnFamilies() == 1;
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std::unordered_set<ColumnFamilyData*> cfds_changed;
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s = FindAndRecoverLogFiles(&cfds_changed, &job_context);
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}
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if (s.IsPathNotFound()) {
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ROCKS_LOG_INFO(immutable_db_options_.info_log,
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"Secondary tries to read WAL, but WAL file(s) have already "
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"been purged by primary.");
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s = Status::OK();
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}
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// TODO: update options_file_number_ needed?
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job_context.Clean();
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return s;
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}
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// find new WAL and apply them in order to the secondary instance
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Status DBImplSecondary::FindAndRecoverLogFiles(
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std::unordered_set<ColumnFamilyData*>* cfds_changed,
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JobContext* job_context) {
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assert(nullptr != cfds_changed);
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assert(nullptr != job_context);
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Status s;
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std::vector<uint64_t> logs;
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s = FindNewLogNumbers(&logs);
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if (s.ok() && !logs.empty()) {
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SequenceNumber next_sequence(kMaxSequenceNumber);
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s = RecoverLogFiles(logs, &next_sequence, cfds_changed, job_context);
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}
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return s;
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}
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// List wal_dir and find all new WALs, return these log numbers
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Status DBImplSecondary::FindNewLogNumbers(std::vector<uint64_t>* logs) {
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assert(logs != nullptr);
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std::vector<std::string> filenames;
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Status s;
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s = env_->GetChildren(immutable_db_options_.wal_dir, &filenames);
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if (s.IsNotFound()) {
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return Status::InvalidArgument("Failed to open wal_dir",
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immutable_db_options_.wal_dir);
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} else if (!s.ok()) {
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return s;
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}
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// if log_readers_ is non-empty, it means we have applied all logs with log
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// numbers smaller than the smallest log in log_readers_, so there is no
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// need to pass these logs to RecoverLogFiles
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uint64_t log_number_min = 0;
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if (!log_readers_.empty()) {
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log_number_min = log_readers_.begin()->first;
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}
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for (size_t i = 0; i < filenames.size(); i++) {
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uint64_t number;
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FileType type;
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if (ParseFileName(filenames[i], &number, &type) && type == kLogFile &&
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number >= log_number_min) {
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logs->push_back(number);
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}
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}
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// Recover logs in the order that they were generated
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if (!logs->empty()) {
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std::sort(logs->begin(), logs->end());
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}
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return s;
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}
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Status DBImplSecondary::MaybeInitLogReader(
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uint64_t log_number, log::FragmentBufferedReader** log_reader) {
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auto iter = log_readers_.find(log_number);
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// make sure the log file is still present
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if (iter == log_readers_.end() ||
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iter->second->reader_->GetLogNumber() != log_number) {
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// delete the obsolete log reader if log number mismatch
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if (iter != log_readers_.end()) {
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log_readers_.erase(iter);
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}
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// initialize log reader from log_number
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// TODO: min_log_number_to_keep_2pc check needed?
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// Open the log file
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std::string fname = LogFileName(immutable_db_options_.wal_dir, log_number);
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ROCKS_LOG_INFO(immutable_db_options_.info_log,
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"Recovering log #%" PRIu64 " mode %d", log_number,
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static_cast<int>(immutable_db_options_.wal_recovery_mode));
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std::unique_ptr<SequentialFileReader> file_reader;
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{
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std::unique_ptr<FSSequentialFile> file;
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Status status = fs_->NewSequentialFile(
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fname, fs_->OptimizeForLogRead(file_options_), &file,
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nullptr);
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if (!status.ok()) {
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*log_reader = nullptr;
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return status;
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}
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file_reader.reset(new SequentialFileReader(
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std::move(file), fname, immutable_db_options_.log_readahead_size,
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io_tracer_));
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}
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// Create the log reader.
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LogReaderContainer* log_reader_container = new LogReaderContainer(
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env_, immutable_db_options_.info_log, std::move(fname),
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std::move(file_reader), log_number);
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log_readers_.insert(std::make_pair(
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log_number, std::unique_ptr<LogReaderContainer>(log_reader_container)));
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}
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iter = log_readers_.find(log_number);
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assert(iter != log_readers_.end());
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*log_reader = iter->second->reader_;
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return Status::OK();
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}
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// After manifest recovery, replay WALs and refresh log_readers_ if necessary
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// REQUIRES: log_numbers are sorted in ascending order
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Status DBImplSecondary::RecoverLogFiles(
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const std::vector<uint64_t>& log_numbers, SequenceNumber* next_sequence,
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std::unordered_set<ColumnFamilyData*>* cfds_changed,
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JobContext* job_context) {
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assert(nullptr != cfds_changed);
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assert(nullptr != job_context);
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mutex_.AssertHeld();
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Status status;
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for (auto log_number : log_numbers) {
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log::FragmentBufferedReader* reader = nullptr;
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status = MaybeInitLogReader(log_number, &reader);
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if (!status.ok()) {
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return status;
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}
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assert(reader != nullptr);
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}
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for (auto log_number : log_numbers) {
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auto it = log_readers_.find(log_number);
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assert(it != log_readers_.end());
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log::FragmentBufferedReader* reader = it->second->reader_;
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// Manually update the file number allocation counter in VersionSet.
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versions_->MarkFileNumberUsed(log_number);
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// Determine if we should tolerate incomplete records at the tail end of the
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// Read all the records and add to a memtable
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std::string scratch;
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Slice record;
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WriteBatch batch;
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while (reader->ReadRecord(&record, &scratch,
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immutable_db_options_.wal_recovery_mode) &&
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status.ok()) {
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if (record.size() < WriteBatchInternal::kHeader) {
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reader->GetReporter()->Corruption(
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record.size(), Status::Corruption("log record too small"));
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continue;
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}
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WriteBatchInternal::SetContents(&batch, record);
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SequenceNumber seq_of_batch = WriteBatchInternal::Sequence(&batch);
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std::vector<uint32_t> column_family_ids;
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status = CollectColumnFamilyIdsFromWriteBatch(batch, &column_family_ids);
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if (status.ok()) {
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for (const auto id : column_family_ids) {
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ColumnFamilyData* cfd =
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versions_->GetColumnFamilySet()->GetColumnFamily(id);
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if (cfd == nullptr) {
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continue;
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}
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if (cfds_changed->count(cfd) == 0) {
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cfds_changed->insert(cfd);
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}
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const std::vector<FileMetaData*>& l0_files =
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cfd->current()->storage_info()->LevelFiles(0);
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SequenceNumber seq =
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l0_files.empty() ? 0 : l0_files.back()->fd.largest_seqno;
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// If the write batch's sequence number is smaller than the last
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// sequence number of the largest sequence persisted for this column
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// family, then its data must reside in an SST that has already been
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// added in the prior MANIFEST replay.
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if (seq_of_batch <= seq) {
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continue;
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}
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auto curr_log_num = port::kMaxUint64;
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if (cfd_to_current_log_.count(cfd) > 0) {
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curr_log_num = cfd_to_current_log_[cfd];
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}
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// If the active memtable contains records added by replaying an
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// earlier WAL, then we need to seal the memtable, add it to the
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// immutable memtable list and create a new active memtable.
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if (!cfd->mem()->IsEmpty() && (curr_log_num == port::kMaxUint64 ||
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curr_log_num != log_number)) {
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const MutableCFOptions mutable_cf_options =
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*cfd->GetLatestMutableCFOptions();
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MemTable* new_mem =
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cfd->ConstructNewMemtable(mutable_cf_options, seq_of_batch);
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cfd->mem()->SetNextLogNumber(log_number);
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cfd->imm()->Add(cfd->mem(), &job_context->memtables_to_free);
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new_mem->Ref();
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cfd->SetMemtable(new_mem);
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}
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}
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bool has_valid_writes = false;
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status = WriteBatchInternal::InsertInto(
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&batch, column_family_memtables_.get(),
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nullptr /* flush_scheduler */, nullptr /* trim_history_scheduler*/,
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true, log_number, this, false /* concurrent_memtable_writes */,
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next_sequence, &has_valid_writes, seq_per_batch_, batch_per_txn_);
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}
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// If column family was not found, it might mean that the WAL write
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// batch references to the column family that was dropped after the
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// insert. We don't want to fail the whole write batch in that case --
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// we just ignore the update.
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// That's why we set ignore missing column families to true
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// passing null flush_scheduler will disable memtable flushing which is
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// needed for secondary instances
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if (status.ok()) {
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for (const auto id : column_family_ids) {
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ColumnFamilyData* cfd =
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versions_->GetColumnFamilySet()->GetColumnFamily(id);
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if (cfd == nullptr) {
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continue;
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}
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std::unordered_map<ColumnFamilyData*, uint64_t>::iterator iter =
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cfd_to_current_log_.find(cfd);
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if (iter == cfd_to_current_log_.end()) {
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cfd_to_current_log_.insert({cfd, log_number});
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} else if (log_number > iter->second) {
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iter->second = log_number;
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}
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}
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auto last_sequence = *next_sequence - 1;
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if ((*next_sequence != kMaxSequenceNumber) &&
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(versions_->LastSequence() <= last_sequence)) {
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versions_->SetLastAllocatedSequence(last_sequence);
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versions_->SetLastPublishedSequence(last_sequence);
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versions_->SetLastSequence(last_sequence);
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}
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} else {
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// We are treating this as a failure while reading since we read valid
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// blocks that do not form coherent data
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reader->GetReporter()->Corruption(record.size(), status);
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}
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}
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if (!status.ok()) {
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return status;
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}
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}
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// remove logreaders from map after successfully recovering the WAL
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if (log_readers_.size() > 1) {
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auto erase_iter = log_readers_.begin();
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std::advance(erase_iter, log_readers_.size() - 1);
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log_readers_.erase(log_readers_.begin(), erase_iter);
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}
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return status;
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}
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// Implementation of the DB interface
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Status DBImplSecondary::Get(const ReadOptions& read_options,
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ColumnFamilyHandle* column_family, const Slice& key,
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PinnableSlice* value) {
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return GetImpl(read_options, column_family, key, value);
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}
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Status DBImplSecondary::GetImpl(const ReadOptions& read_options,
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ColumnFamilyHandle* column_family,
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const Slice& key, PinnableSlice* pinnable_val) {
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assert(pinnable_val != nullptr);
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PERF_CPU_TIMER_GUARD(get_cpu_nanos, env_);
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StopWatch sw(env_, stats_, DB_GET);
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PERF_TIMER_GUARD(get_snapshot_time);
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auto cfh = static_cast<ColumnFamilyHandleImpl*>(column_family);
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ColumnFamilyData* cfd = cfh->cfd();
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if (tracer_) {
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InstrumentedMutexLock lock(&trace_mutex_);
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if (tracer_) {
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tracer_->Get(column_family, key);
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}
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}
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// Acquire SuperVersion
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SuperVersion* super_version = GetAndRefSuperVersion(cfd);
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SequenceNumber snapshot = versions_->LastSequence();
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MergeContext merge_context;
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SequenceNumber max_covering_tombstone_seq = 0;
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Status s;
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LookupKey lkey(key, snapshot);
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PERF_TIMER_STOP(get_snapshot_time);
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bool done = false;
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if (super_version->mem->Get(lkey, pinnable_val->GetSelf(),
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/*timestamp=*/nullptr, &s, &merge_context,
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&max_covering_tombstone_seq, read_options)) {
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done = true;
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pinnable_val->PinSelf();
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RecordTick(stats_, MEMTABLE_HIT);
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} else if ((s.ok() || s.IsMergeInProgress()) &&
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super_version->imm->Get(
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lkey, pinnable_val->GetSelf(), /*timestamp=*/nullptr, &s,
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&merge_context, &max_covering_tombstone_seq, read_options)) {
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done = true;
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pinnable_val->PinSelf();
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RecordTick(stats_, MEMTABLE_HIT);
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}
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if (!done && !s.ok() && !s.IsMergeInProgress()) {
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ReturnAndCleanupSuperVersion(cfd, super_version);
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return s;
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}
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if (!done) {
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PERF_TIMER_GUARD(get_from_output_files_time);
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super_version->current->Get(read_options, lkey, pinnable_val,
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/*timestamp=*/nullptr, &s, &merge_context,
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&max_covering_tombstone_seq);
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RecordTick(stats_, MEMTABLE_MISS);
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}
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{
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PERF_TIMER_GUARD(get_post_process_time);
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ReturnAndCleanupSuperVersion(cfd, super_version);
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RecordTick(stats_, NUMBER_KEYS_READ);
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size_t size = pinnable_val->size();
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RecordTick(stats_, BYTES_READ, size);
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RecordTimeToHistogram(stats_, BYTES_PER_READ, size);
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PERF_COUNTER_ADD(get_read_bytes, size);
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}
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return s;
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}
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Iterator* DBImplSecondary::NewIterator(const ReadOptions& read_options,
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ColumnFamilyHandle* column_family) {
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if (read_options.managed) {
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return NewErrorIterator(
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Status::NotSupported("Managed iterator is not supported anymore."));
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}
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if (read_options.read_tier == kPersistedTier) {
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return NewErrorIterator(Status::NotSupported(
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"ReadTier::kPersistedData is not yet supported in iterators."));
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}
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Iterator* result = nullptr;
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auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
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auto cfd = cfh->cfd();
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ReadCallback* read_callback = nullptr; // No read callback provided.
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if (read_options.tailing) {
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return NewErrorIterator(Status::NotSupported(
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"tailing iterator not supported in secondary mode"));
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} else if (read_options.snapshot != nullptr) {
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// TODO (yanqin) support snapshot.
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return NewErrorIterator(
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Status::NotSupported("snapshot not supported in secondary mode"));
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} else {
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auto snapshot = versions_->LastSequence();
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result = NewIteratorImpl(read_options, cfd, snapshot, read_callback);
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}
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return result;
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}
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ArenaWrappedDBIter* DBImplSecondary::NewIteratorImpl(
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const ReadOptions& read_options, ColumnFamilyData* cfd,
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SequenceNumber snapshot, ReadCallback* read_callback) {
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assert(nullptr != cfd);
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SuperVersion* super_version = cfd->GetReferencedSuperVersion(this);
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auto db_iter = NewArenaWrappedDbIterator(
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env_, read_options, *cfd->ioptions(), super_version->mutable_cf_options,
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snapshot,
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super_version->mutable_cf_options.max_sequential_skip_in_iterations,
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super_version->version_number, read_callback);
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auto internal_iter = NewInternalIterator(
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db_iter->GetReadOptions(), cfd, super_version, db_iter->GetArena(),
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db_iter->GetRangeDelAggregator(), snapshot,
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/* allow_unprepared_value */ true);
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db_iter->SetIterUnderDBIter(internal_iter);
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return db_iter;
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}
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Status DBImplSecondary::NewIterators(
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const ReadOptions& read_options,
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const std::vector<ColumnFamilyHandle*>& column_families,
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std::vector<Iterator*>* iterators) {
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if (read_options.managed) {
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return Status::NotSupported("Managed iterator is not supported anymore.");
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}
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if (read_options.read_tier == kPersistedTier) {
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return Status::NotSupported(
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"ReadTier::kPersistedData is not yet supported in iterators.");
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}
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ReadCallback* read_callback = nullptr; // No read callback provided.
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if (iterators == nullptr) {
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return Status::InvalidArgument("iterators not allowed to be nullptr");
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}
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iterators->clear();
|
|
iterators->reserve(column_families.size());
|
|
if (read_options.tailing) {
|
|
return Status::NotSupported(
|
|
"tailing iterator not supported in secondary mode");
|
|
} else if (read_options.snapshot != nullptr) {
|
|
// TODO (yanqin) support snapshot.
|
|
return Status::NotSupported("snapshot not supported in secondary mode");
|
|
} else {
|
|
SequenceNumber read_seq = versions_->LastSequence();
|
|
for (auto cfh : column_families) {
|
|
ColumnFamilyData* cfd = static_cast<ColumnFamilyHandleImpl*>(cfh)->cfd();
|
|
iterators->push_back(
|
|
NewIteratorImpl(read_options, cfd, read_seq, read_callback));
|
|
}
|
|
}
|
|
return Status::OK();
|
|
}
|
|
|
|
Status DBImplSecondary::CheckConsistency() {
|
|
mutex_.AssertHeld();
|
|
Status s = DBImpl::CheckConsistency();
|
|
// If DBImpl::CheckConsistency() which is stricter returns success, then we
|
|
// do not need to give a second chance.
|
|
if (s.ok()) {
|
|
return s;
|
|
}
|
|
// It's possible that DBImpl::CheckConssitency() can fail because the primary
|
|
// may have removed certain files, causing the GetFileSize(name) call to
|
|
// fail and returning a PathNotFound. In this case, we take a best-effort
|
|
// approach and just proceed.
|
|
TEST_SYNC_POINT_CALLBACK(
|
|
"DBImplSecondary::CheckConsistency:AfterFirstAttempt", &s);
|
|
|
|
if (immutable_db_options_.skip_checking_sst_file_sizes_on_db_open) {
|
|
return Status::OK();
|
|
}
|
|
|
|
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;
|
|
s = env_->GetFileSize(file_path, &fsize);
|
|
if (!s.ok() &&
|
|
(env_->GetFileSize(Rocks2LevelTableFileName(file_path), &fsize).ok() ||
|
|
s.IsPathNotFound())) {
|
|
s = Status::OK();
|
|
}
|
|
if (!s.ok()) {
|
|
corruption_messages +=
|
|
"Can't access " + md.name + ": " + s.ToString() + "\n";
|
|
}
|
|
}
|
|
return corruption_messages.empty() ? Status::OK()
|
|
: Status::Corruption(corruption_messages);
|
|
}
|
|
|
|
Status DBImplSecondary::TryCatchUpWithPrimary() {
|
|
assert(versions_.get() != nullptr);
|
|
assert(manifest_reader_.get() != nullptr);
|
|
Status s;
|
|
// read the manifest and apply new changes to the secondary instance
|
|
std::unordered_set<ColumnFamilyData*> cfds_changed;
|
|
JobContext job_context(0, true /*create_superversion*/);
|
|
{
|
|
InstrumentedMutexLock lock_guard(&mutex_);
|
|
s = static_cast_with_check<ReactiveVersionSet>(versions_.get())
|
|
->ReadAndApply(&mutex_, &manifest_reader_, &cfds_changed);
|
|
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "Last sequence is %" PRIu64,
|
|
static_cast<uint64_t>(versions_->LastSequence()));
|
|
for (ColumnFamilyData* cfd : cfds_changed) {
|
|
if (cfd->IsDropped()) {
|
|
ROCKS_LOG_DEBUG(immutable_db_options_.info_log, "[%s] is dropped\n",
|
|
cfd->GetName().c_str());
|
|
continue;
|
|
}
|
|
VersionStorageInfo::LevelSummaryStorage tmp;
|
|
ROCKS_LOG_DEBUG(immutable_db_options_.info_log,
|
|
"[%s] Level summary: %s\n", cfd->GetName().c_str(),
|
|
cfd->current()->storage_info()->LevelSummary(&tmp));
|
|
}
|
|
|
|
// list wal_dir to discover new WALs and apply new changes to the secondary
|
|
// instance
|
|
if (s.ok()) {
|
|
s = FindAndRecoverLogFiles(&cfds_changed, &job_context);
|
|
}
|
|
if (s.IsPathNotFound()) {
|
|
ROCKS_LOG_INFO(
|
|
immutable_db_options_.info_log,
|
|
"Secondary tries to read WAL, but WAL file(s) have already "
|
|
"been purged by primary.");
|
|
s = Status::OK();
|
|
}
|
|
if (s.ok()) {
|
|
for (auto cfd : cfds_changed) {
|
|
cfd->imm()->RemoveOldMemTables(cfd->GetLogNumber(),
|
|
&job_context.memtables_to_free);
|
|
auto& sv_context = job_context.superversion_contexts.back();
|
|
cfd->InstallSuperVersion(&sv_context, &mutex_);
|
|
sv_context.NewSuperVersion();
|
|
}
|
|
}
|
|
}
|
|
job_context.Clean();
|
|
|
|
// Cleanup unused, obsolete files.
|
|
JobContext purge_files_job_context(0);
|
|
{
|
|
InstrumentedMutexLock lock_guard(&mutex_);
|
|
// Currently, secondary instance does not own the database files, thus it
|
|
// is unnecessary for the secondary to force full scan.
|
|
FindObsoleteFiles(&purge_files_job_context, /*force=*/false);
|
|
}
|
|
if (purge_files_job_context.HaveSomethingToDelete()) {
|
|
PurgeObsoleteFiles(purge_files_job_context);
|
|
}
|
|
purge_files_job_context.Clean();
|
|
return s;
|
|
}
|
|
|
|
Status DB::OpenAsSecondary(const Options& options, const std::string& dbname,
|
|
const std::string& secondary_path, DB** dbptr) {
|
|
*dbptr = nullptr;
|
|
|
|
DBOptions db_options(options);
|
|
ColumnFamilyOptions cf_options(options);
|
|
std::vector<ColumnFamilyDescriptor> column_families;
|
|
column_families.emplace_back(kDefaultColumnFamilyName, cf_options);
|
|
std::vector<ColumnFamilyHandle*> handles;
|
|
|
|
Status s = DB::OpenAsSecondary(db_options, dbname, secondary_path,
|
|
column_families, &handles, dbptr);
|
|
if (s.ok()) {
|
|
assert(handles.size() == 1);
|
|
delete handles[0];
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DB::OpenAsSecondary(
|
|
const DBOptions& db_options, const std::string& dbname,
|
|
const std::string& secondary_path,
|
|
const std::vector<ColumnFamilyDescriptor>& column_families,
|
|
std::vector<ColumnFamilyHandle*>* handles, DB** dbptr) {
|
|
*dbptr = nullptr;
|
|
if (db_options.max_open_files != -1) {
|
|
// TODO (yanqin) maybe support max_open_files != -1 by creating hard links
|
|
// on SST files so that db secondary can still have access to old SSTs
|
|
// while primary instance may delete original.
|
|
return Status::InvalidArgument("require max_open_files to be -1");
|
|
}
|
|
|
|
DBOptions tmp_opts(db_options);
|
|
Status s;
|
|
if (nullptr == tmp_opts.info_log) {
|
|
s = CreateLoggerFromOptions(secondary_path, tmp_opts, &tmp_opts.info_log);
|
|
if (!s.ok()) {
|
|
tmp_opts.info_log = nullptr;
|
|
}
|
|
}
|
|
|
|
handles->clear();
|
|
DBImplSecondary* impl = new DBImplSecondary(tmp_opts, dbname);
|
|
impl->versions_.reset(new ReactiveVersionSet(
|
|
dbname, &impl->immutable_db_options_, impl->file_options_,
|
|
impl->table_cache_.get(), impl->write_buffer_manager_,
|
|
&impl->write_controller_, impl->io_tracer_));
|
|
impl->column_family_memtables_.reset(
|
|
new ColumnFamilyMemTablesImpl(impl->versions_->GetColumnFamilySet()));
|
|
impl->wal_in_db_path_ = IsWalDirSameAsDBPath(&impl->immutable_db_options_);
|
|
|
|
impl->mutex_.Lock();
|
|
s = impl->Recover(column_families, true, false, false);
|
|
if (s.ok()) {
|
|
for (auto cf : column_families) {
|
|
auto cfd =
|
|
impl->versions_->GetColumnFamilySet()->GetColumnFamily(cf.name);
|
|
if (nullptr == cfd) {
|
|
s = Status::InvalidArgument("Column family not found", cf.name);
|
|
break;
|
|
}
|
|
handles->push_back(new ColumnFamilyHandleImpl(cfd, impl, &impl->mutex_));
|
|
}
|
|
}
|
|
SuperVersionContext sv_context(true /* create_superversion */);
|
|
if (s.ok()) {
|
|
for (auto cfd : *impl->versions_->GetColumnFamilySet()) {
|
|
sv_context.NewSuperVersion();
|
|
cfd->InstallSuperVersion(&sv_context, &impl->mutex_);
|
|
}
|
|
}
|
|
impl->mutex_.Unlock();
|
|
sv_context.Clean();
|
|
if (s.ok()) {
|
|
*dbptr = impl;
|
|
for (auto h : *handles) {
|
|
impl->NewThreadStatusCfInfo(
|
|
static_cast_with_check<ColumnFamilyHandleImpl>(h)->cfd());
|
|
}
|
|
} else {
|
|
for (auto h : *handles) {
|
|
delete h;
|
|
}
|
|
handles->clear();
|
|
delete impl;
|
|
}
|
|
return s;
|
|
}
|
|
#else // !ROCKSDB_LITE
|
|
|
|
Status DB::OpenAsSecondary(const Options& /*options*/,
|
|
const std::string& /*name*/,
|
|
const std::string& /*secondary_path*/,
|
|
DB** /*dbptr*/) {
|
|
return Status::NotSupported("Not supported in ROCKSDB_LITE.");
|
|
}
|
|
|
|
Status DB::OpenAsSecondary(
|
|
const DBOptions& /*db_options*/, const std::string& /*dbname*/,
|
|
const std::string& /*secondary_path*/,
|
|
const std::vector<ColumnFamilyDescriptor>& /*column_families*/,
|
|
std::vector<ColumnFamilyHandle*>* /*handles*/, DB** /*dbptr*/) {
|
|
return Status::NotSupported("Not supported in ROCKSDB_LITE.");
|
|
}
|
|
#endif // !ROCKSDB_LITE
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|