Summary: Use ImmutableDBOptions/MutableDBOptions internally and DBOptions only for user-facing APIs. MutableDBOptions is barely a placeholder for now. I'll start to move options to MutableDBOptions in following diffs. Test Plan: make all check Reviewers: yhchiang, IslamAbdelRahman, sdong Reviewed By: sdong Subscribers: andrewkr, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D64065
162 lines
5.3 KiB
C++
162 lines
5.3 KiB
C++
// Copyright (c) 2011-present, 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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#pragma once
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#include <atomic>
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#include <deque>
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#include <functional>
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#include <limits>
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#include <set>
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#include <string>
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#include <utility>
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#include <vector>
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#include "db/column_family.h"
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#include "db/compaction_iterator.h"
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#include "db/dbformat.h"
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#include "db/flush_scheduler.h"
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#include "db/internal_stats.h"
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#include "db/job_context.h"
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#include "db/log_writer.h"
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#include "db/memtable_list.h"
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#include "db/version_edit.h"
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#include "db/write_controller.h"
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#include "db/write_thread.h"
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#include "port/port.h"
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#include "rocksdb/compaction_filter.h"
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#include "rocksdb/compaction_job_stats.h"
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#include "rocksdb/db.h"
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#include "rocksdb/env.h"
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#include "rocksdb/memtablerep.h"
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#include "rocksdb/transaction_log.h"
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#include "table/scoped_arena_iterator.h"
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#include "util/autovector.h"
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#include "util/db_options.h"
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#include "util/event_logger.h"
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#include "util/stop_watch.h"
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#include "util/thread_local.h"
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namespace rocksdb {
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class MemTable;
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class TableCache;
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class Version;
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class VersionEdit;
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class VersionSet;
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class Arena;
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class CompactionJob {
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public:
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CompactionJob(int job_id, Compaction* compaction,
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const ImmutableDBOptions& db_options,
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const EnvOptions& env_options, VersionSet* versions,
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std::atomic<bool>* shutting_down, LogBuffer* log_buffer,
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Directory* db_directory, Directory* output_directory,
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Statistics* stats, InstrumentedMutex* db_mutex,
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Status* db_bg_error,
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std::vector<SequenceNumber> existing_snapshots,
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SequenceNumber earliest_write_conflict_snapshot,
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std::shared_ptr<Cache> table_cache, EventLogger* event_logger,
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bool paranoid_file_checks, bool measure_io_stats,
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const std::string& dbname,
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CompactionJobStats* compaction_job_stats);
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~CompactionJob();
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// no copy/move
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CompactionJob(CompactionJob&& job) = delete;
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CompactionJob(const CompactionJob& job) = delete;
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CompactionJob& operator=(const CompactionJob& job) = delete;
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// REQUIRED: mutex held
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void Prepare();
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// REQUIRED mutex not held
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Status Run();
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// REQUIRED: mutex held
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Status Install(const MutableCFOptions& mutable_cf_options);
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private:
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struct SubcompactionState;
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void AggregateStatistics();
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void GenSubcompactionBoundaries();
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// update the thread status for starting a compaction.
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void ReportStartedCompaction(Compaction* compaction);
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void AllocateCompactionOutputFileNumbers();
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// Call compaction filter. Then iterate through input and compact the
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// kv-pairs
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void ProcessKeyValueCompaction(SubcompactionState* sub_compact);
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Status FinishCompactionOutputFile(const Status& input_status,
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SubcompactionState* sub_compact);
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Status InstallCompactionResults(const MutableCFOptions& mutable_cf_options);
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void RecordCompactionIOStats();
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Status OpenCompactionOutputFile(SubcompactionState* sub_compact);
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void CleanupCompaction();
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void UpdateCompactionJobStats(
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const InternalStats::CompactionStats& stats) const;
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void RecordDroppedKeys(const CompactionIteratorStats& c_iter_stats,
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CompactionJobStats* compaction_job_stats = nullptr);
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void UpdateCompactionStats();
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void UpdateCompactionInputStatsHelper(
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int* num_files, uint64_t* bytes_read, int input_level);
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void LogCompaction();
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int job_id_;
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// CompactionJob state
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struct CompactionState;
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CompactionState* compact_;
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CompactionJobStats* compaction_job_stats_;
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InternalStats::CompactionStats compaction_stats_;
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// DBImpl state
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const std::string& dbname_;
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const ImmutableDBOptions& db_options_;
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const EnvOptions& env_options_;
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Env* env_;
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VersionSet* versions_;
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std::atomic<bool>* shutting_down_;
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LogBuffer* log_buffer_;
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Directory* db_directory_;
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Directory* output_directory_;
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Statistics* stats_;
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InstrumentedMutex* db_mutex_;
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Status* db_bg_error_;
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// If there were two snapshots with seq numbers s1 and
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// s2 and s1 < s2, and if we find two instances of a key k1 then lies
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// entirely within s1 and s2, then the earlier version of k1 can be safely
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// deleted because that version is not visible in any snapshot.
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std::vector<SequenceNumber> existing_snapshots_;
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// This is the earliest snapshot that could be used for write-conflict
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// checking by a transaction. For any user-key newer than this snapshot, we
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// should make sure not to remove evidence that a write occurred.
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SequenceNumber earliest_write_conflict_snapshot_;
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std::shared_ptr<Cache> table_cache_;
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EventLogger* event_logger_;
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bool bottommost_level_;
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bool paranoid_file_checks_;
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bool measure_io_stats_;
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// Stores the Slices that designate the boundaries for each subcompaction
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std::vector<Slice> boundaries_;
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// Stores the approx size of keys covered in the range of each subcompaction
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std::vector<uint64_t> sizes_;
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};
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} // namespace rocksdb
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