be7703b27d
Summary: This change introduces a new, lightweight _experimental_ API that reconstructs the [file # -> file checksum -> file checksum function] 1-1-1 mapping directly from the `MANIFEST` file considered `CURRENT` in scope of specific DB instance at the time. The goal is to provide a cheap alternative to `DB::GetLiveFilesMetaData` that doesn't require opening the database, reconstructing version sets and/or accessing files that are _potentially_ in disaggregated storage. ### Housekeeping: 1. Moved the `GetCurrentManifestPath` out of `version_set` to a new `manifest_ops` file(s) dedicated to manifest related operations. 2. Introduced new `Env::IOActivity::kReadManifest` to better reflect the IO intent in offline file checksum retrieving function. Pull Request resolved: https://github.com/facebook/rocksdb/pull/13178 Test Plan: Added a unit test comparing the outcome of newly introduced API against the established `GetLiveFilesMetaData`: ```hcl ./db_test2 --gtest_filter="*GetFileChecksumsFromCurrentManifest_CRC32*" ``` Reviewed By: pdillinger Differential Revision: D66711910 Pulled By: mszeszko-meta fbshipit-source-id: 57091c550a14ac2e832bf7eea136dab5450e71bc
123 lines
4.4 KiB
C++
123 lines
4.4 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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// This file defines the structures for thread operation and state.
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// Thread operations are used to describe high level action of a
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// thread such as doing compaction or flush, while thread state
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// are used to describe lower-level action such as reading /
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// writing a file or waiting for a mutex. Operations and states
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// are designed to be independent. Typically, a thread usually involves
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// in one operation and one state at any specific point in time.
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#pragma once
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#include <string>
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#include "rocksdb/thread_status.h"
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namespace ROCKSDB_NAMESPACE {
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#ifdef ROCKSDB_USING_THREAD_STATUS
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// The structure that describes a major thread operation.
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struct OperationInfo {
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const ThreadStatus::OperationType type;
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const std::string name;
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};
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// The global operation table.
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//
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// When updating a status of a thread, the pointer of the OperationInfo
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// of the current ThreadStatusData will be pointing to one of the
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// rows in this global table.
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//
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// Note that it's not designed to be constant as in the future we
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// might consider adding global count to the OperationInfo.
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static OperationInfo global_operation_table[] = {
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{ThreadStatus::OP_UNKNOWN, ""},
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{ThreadStatus::OP_COMPACTION, "Compaction"},
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{ThreadStatus::OP_FLUSH, "Flush"},
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{ThreadStatus::OP_DBOPEN, "DBOpen"},
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{ThreadStatus::OP_GET, "Get"},
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{ThreadStatus::OP_MULTIGET, "MultiGet"},
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{ThreadStatus::OP_DBITERATOR, "DBIterator"},
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{ThreadStatus::OP_VERIFY_DB_CHECKSUM, "VerifyDBChecksum"},
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{ThreadStatus::OP_VERIFY_FILE_CHECKSUMS, "VerifyFileChecksums"},
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{ThreadStatus::OP_GETENTITY, "GetEntity"},
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{ThreadStatus::OP_MULTIGETENTITY, "MultiGetEntity"},
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{ThreadStatus::OP_READ_MANIFEST, "ReadManifest"},
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};
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struct OperationStageInfo {
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const ThreadStatus::OperationStage stage;
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const std::string name;
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};
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// A table maintains the mapping from stage type to stage string.
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// Note that the string must be changed accordingly when the
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// associated function name changed.
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static OperationStageInfo global_op_stage_table[] = {
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{ThreadStatus::STAGE_UNKNOWN, ""},
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{ThreadStatus::STAGE_FLUSH_RUN, "FlushJob::Run"},
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{ThreadStatus::STAGE_FLUSH_WRITE_L0, "FlushJob::WriteLevel0Table"},
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{ThreadStatus::STAGE_COMPACTION_PREPARE, "CompactionJob::Prepare"},
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{ThreadStatus::STAGE_COMPACTION_RUN, "CompactionJob::Run"},
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{ThreadStatus::STAGE_COMPACTION_PROCESS_KV,
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"CompactionJob::ProcessKeyValueCompaction"},
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{ThreadStatus::STAGE_COMPACTION_INSTALL, "CompactionJob::Install"},
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{ThreadStatus::STAGE_COMPACTION_SYNC_FILE,
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"CompactionJob::FinishCompactionOutputFile"},
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{ThreadStatus::STAGE_PICK_MEMTABLES_TO_FLUSH,
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"MemTableList::PickMemtablesToFlush"},
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{ThreadStatus::STAGE_MEMTABLE_ROLLBACK,
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"MemTableList::RollbackMemtableFlush"},
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{ThreadStatus::STAGE_MEMTABLE_INSTALL_FLUSH_RESULTS,
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"MemTableList::TryInstallMemtableFlushResults"},
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};
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// The structure that describes a state.
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struct StateInfo {
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const ThreadStatus::StateType type;
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const std::string name;
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};
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// The global state table.
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//
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// When updating a status of a thread, the pointer of the StateInfo
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// of the current ThreadStatusData will be pointing to one of the
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// rows in this global table.
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static StateInfo global_state_table[] = {
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{ThreadStatus::STATE_UNKNOWN, ""},
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{ThreadStatus::STATE_MUTEX_WAIT, "Mutex Wait"},
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};
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struct OperationProperty {
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int code;
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std::string name;
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};
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static OperationProperty compaction_operation_properties[] = {
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{ThreadStatus::COMPACTION_JOB_ID, "JobID"},
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{ThreadStatus::COMPACTION_INPUT_OUTPUT_LEVEL, "InputOutputLevel"},
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{ThreadStatus::COMPACTION_PROP_FLAGS, "Manual/Deletion/Trivial"},
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{ThreadStatus::COMPACTION_TOTAL_INPUT_BYTES, "TotalInputBytes"},
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{ThreadStatus::COMPACTION_BYTES_READ, "BytesRead"},
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{ThreadStatus::COMPACTION_BYTES_WRITTEN, "BytesWritten"},
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};
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static OperationProperty flush_operation_properties[] = {
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{ThreadStatus::FLUSH_JOB_ID, "JobID"},
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{ThreadStatus::FLUSH_BYTES_MEMTABLES, "BytesMemtables"},
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{ThreadStatus::FLUSH_BYTES_WRITTEN, "BytesWritten"}};
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#else
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struct OperationInfo {};
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struct StateInfo {};
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#endif // ROCKSDB_USING_THREAD_STATUS
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} // namespace ROCKSDB_NAMESPACE
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