250a51a3f9
Summary: Refactor BlobDB open logic. List of changes: Major: * On reopen, mark blob files found as immutable, do not use them for writing new keys. * Not to scan the whole file to find file footer. Instead just seek to the end of the file and try to read footer. Minor: * Move most of the real logic from blob_db.cc to blob_db_impl.cc. * Not to hold shared_ptr of event listeners in global maps in blob_db.cc * Some changes to BlobFile interface. * Improve logging and error handling. Closes https://github.com/facebook/rocksdb/pull/3246 Differential Revision: D6526147 Pulled By: yiwu-arbug fbshipit-source-id: 9dc4cdd63359a2f9b696af817086949da8d06952
93 lines
3.4 KiB
C++
93 lines
3.4 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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//
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#ifndef ROCKSDB_LITE
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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 "utilities/blob_db/blob_db.h"
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#include <inttypes.h>
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#include "utilities/blob_db/blob_db_impl.h"
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namespace rocksdb {
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namespace blob_db {
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Status BlobDB::Open(const Options& options, const BlobDBOptions& bdb_options,
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const std::string& dbname, BlobDB** blob_db) {
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*blob_db = nullptr;
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DBOptions db_options(options);
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ColumnFamilyOptions cf_options(options);
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std::vector<ColumnFamilyDescriptor> column_families;
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column_families.push_back(
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ColumnFamilyDescriptor(kDefaultColumnFamilyName, cf_options));
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std::vector<ColumnFamilyHandle*> handles;
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Status s = BlobDB::Open(db_options, bdb_options, dbname, column_families,
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&handles, blob_db);
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if (s.ok()) {
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assert(handles.size() == 1);
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// i can delete the handle since DBImpl is always holding a reference to
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// default column family
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delete handles[0];
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}
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return s;
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}
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Status BlobDB::Open(const DBOptions& db_options,
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const BlobDBOptions& bdb_options, const std::string& dbname,
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const std::vector<ColumnFamilyDescriptor>& column_families,
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std::vector<ColumnFamilyHandle*>* handles,
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BlobDB** blob_db) {
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if (column_families.size() != 1 ||
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column_families[0].name != kDefaultColumnFamilyName) {
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return Status::NotSupported(
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"Blob DB doesn't support non-default column family.");
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}
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BlobDBImpl* blob_db_impl = new BlobDBImpl(dbname, bdb_options, db_options,
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column_families[0].options);
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Status s = blob_db_impl->Open(handles);
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if (s.ok()) {
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*blob_db = static_cast<BlobDB*>(blob_db_impl);
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} else {
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delete blob_db_impl;
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*blob_db = nullptr;
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}
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return s;
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}
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BlobDB::BlobDB() : StackableDB(nullptr) {}
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void BlobDBOptions::Dump(Logger* log) const {
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ROCKS_LOG_HEADER(log, " blob_db_options.blob_dir: %s",
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blob_dir.c_str());
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ROCKS_LOG_HEADER(log, " blob_db_options.path_relative: %d",
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path_relative);
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ROCKS_LOG_HEADER(log, " blob_db_options.is_fifo: %d",
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is_fifo);
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ROCKS_LOG_HEADER(log, " blob_db_options.blob_dir_size: %" PRIu64,
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blob_dir_size);
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ROCKS_LOG_HEADER(log, " blob_db_options.ttl_range_secs: %" PRIu32,
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ttl_range_secs);
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ROCKS_LOG_HEADER(log, " blob_db_options.bytes_per_sync: %" PRIu64,
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bytes_per_sync);
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ROCKS_LOG_HEADER(log, " blob_db_options.blob_file_size: %" PRIu64,
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blob_file_size);
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ROCKS_LOG_HEADER(log, " blob_db_options.ttl_extractor: %p",
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ttl_extractor.get());
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ROCKS_LOG_HEADER(log, " blob_db_options.compression: %d",
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static_cast<int>(compression));
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ROCKS_LOG_HEADER(log, "blob_db_options.enable_garbage_collection: %d",
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enable_garbage_collection);
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ROCKS_LOG_HEADER(log, " blob_db_options.disable_background_tasks: %d",
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disable_background_tasks);
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}
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} // namespace blob_db
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} // namespace rocksdb
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#endif
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