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6de7081cf3
Summary: Although we've been tracking SST unique IDs in the DB manifest unconditionally, checking has been opt-in and with an extra pass at DB::Open time. This changes the behavior of `verify_sst_unique_id_in_manifest` to check unique ID against manifest every time an SST file is opened through table cache (normal DB operations), replacing the explicit pass over files at DB::Open time. This change also enables the option by default and removes the "EXPERIMENTAL" designation. One possible criticism is that the option no longer ensures the integrity of a DB at Open time. This is far from an all-or-nothing issue. Verifying the IDs of all SST files hardly ensures all the data in the DB is readable. (VerifyChecksum is supposed to do that.) Also, with max_open_files=-1 (default, extremely common), all SST files are opened at DB::Open time anyway. Implementation details: * `VerifySstUniqueIdInManifest()` functions are the extra/explicit pass that is now removed. * Unit tests that manipulate/corrupt table properties have to opt out of this check, because that corrupts the "actual" unique id. (And even for testing we don't currently have a mechanism to set "no unique id" in the in-memory file metadata for new files.) * A lot of other unit test churn relates to (a) default checking on, and (b) checking on SST open even without DB::Open (e.g. on flush) * Use `FileMetaData` for more `TableCache` operations (in place of `FileDescriptor`) so that we have access to the unique_id whenever we might need to open an SST file. **There is the possibility of performance impact because we can no longer use the more localized `fd` part of an `FdWithKeyRange` but instead follow the `file_metadata` pointer. However, this change (possible regression) is only done for `GetMemoryUsageByTableReaders`.** * Removed a completely unnecessary constructor overload of `TableReaderOptions` Possible follow-up: * Verification only happens when opening through table cache. Are there more places where this should happen? * Improve error message when there is a file size mismatch vs. manifest (FIXME added in the appropriate place). * I'm not sure there's a justification for `FileDescriptor` to be distinct from `FileMetaData`. * I'm skeptical that `FdWithKeyRange` really still makes sense for optimizing some data locality by duplicating some data in memory, but I could be wrong. * An unnecessary overload of NewTableReader was recently added, in the public API nonetheless (though unusable there). It should be cleaned up to put most things under `TableReaderOptions`. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10532 Test Plan: updated unit tests Performance test showing no significant difference (just noise I think): `./db_bench -benchmarks=readwhilewriting[-X10] -num=3000000 -disable_wal=1 -bloom_bits=8 -write_buffer_size=1000000 -target_file_size_base=1000000` Before: readwhilewriting [AVG 10 runs] : 68702 (± 6932) ops/sec After: readwhilewriting [AVG 10 runs] : 68239 (± 7198) ops/sec Reviewed By: jay-zhuang Differential Revision: D38765551 Pulled By: pdillinger fbshipit-source-id: a827a708155f12344ab2a5c16e7701c7636da4c2
2094 lines
79 KiB
C++
2094 lines
79 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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// 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 <cinttypes>
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#include "db/builder.h"
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#include "db/db_impl/db_impl.h"
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#include "db/error_handler.h"
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#include "db/periodic_task_scheduler.h"
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#include "env/composite_env_wrapper.h"
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#include "file/filename.h"
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#include "file/read_write_util.h"
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#include "file/sst_file_manager_impl.h"
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#include "file/writable_file_writer.h"
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#include "logging/logging.h"
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#include "monitoring/persistent_stats_history.h"
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#include "options/options_helper.h"
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#include "rocksdb/table.h"
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#include "rocksdb/wal_filter.h"
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#include "test_util/sync_point.h"
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#include "util/rate_limiter.h"
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namespace ROCKSDB_NAMESPACE {
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Options SanitizeOptions(const std::string& dbname, const Options& src,
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bool read_only, Status* logger_creation_s) {
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auto db_options =
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SanitizeOptions(dbname, DBOptions(src), read_only, logger_creation_s);
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ImmutableDBOptions immutable_db_options(db_options);
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auto cf_options =
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SanitizeOptions(immutable_db_options, 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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bool read_only, Status* logger_creation_s) {
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DBOptions result(src);
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if (result.env == nullptr) {
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result.env = Env::Default();
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}
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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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int max_max_open_files = port::GetMaxOpenFiles();
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if (max_max_open_files == -1) {
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max_max_open_files = 0x400000;
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}
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ClipToRange(&result.max_open_files, 20, max_max_open_files);
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TEST_SYNC_POINT_CALLBACK("SanitizeOptions::AfterChangeMaxOpenFiles",
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&result.max_open_files);
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}
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if (result.info_log == nullptr && !read_only) {
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Status s = CreateLoggerFromOptions(dbname, 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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if (logger_creation_s) {
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*logger_creation_s = s;
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}
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}
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}
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if (!result.write_buffer_manager) {
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result.write_buffer_manager.reset(
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new WriteBufferManager(result.db_write_buffer_size));
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}
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auto bg_job_limits = DBImpl::GetBGJobLimits(
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result.max_background_flushes, result.max_background_compactions,
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result.max_background_jobs, true /* parallelize_compactions */);
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result.env->IncBackgroundThreadsIfNeeded(bg_job_limits.max_compactions,
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Env::Priority::LOW);
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result.env->IncBackgroundThreadsIfNeeded(bg_job_limits.max_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.delayed_write_rate == 0) {
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if (result.rate_limiter.get() != nullptr) {
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result.delayed_write_rate = result.rate_limiter->GetBytesPerSecond();
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}
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if (result.delayed_write_rate == 0) {
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result.delayed_write_rate = 16 * 1024 * 1024;
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}
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}
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if (result.WAL_ttl_seconds > 0 || result.WAL_size_limit_MB > 0) {
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result.recycle_log_file_num = false;
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}
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if (result.recycle_log_file_num &&
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(result.wal_recovery_mode ==
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WALRecoveryMode::kTolerateCorruptedTailRecords ||
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result.wal_recovery_mode == WALRecoveryMode::kPointInTimeRecovery ||
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result.wal_recovery_mode == WALRecoveryMode::kAbsoluteConsistency)) {
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// - kTolerateCorruptedTailRecords is inconsistent with recycle log file
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// feature. WAL recycling expects recovery success upon encountering a
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// corrupt record at the point where new data ends and recycled data
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// remains at the tail. However, `kTolerateCorruptedTailRecords` must fail
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// upon encountering any such corrupt record, as it cannot differentiate
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// between this and a real corruption, which would cause committed updates
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// to be truncated -- a violation of the recovery guarantee.
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// - kPointInTimeRecovery and kAbsoluteConsistency are incompatible with
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// recycle log file feature temporarily due to a bug found introducing a
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// hole in the recovered data
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// (https://github.com/facebook/rocksdb/pull/7252#issuecomment-673766236).
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// Besides this bug, we believe the features are fundamentally compatible.
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result.recycle_log_file_num = 0;
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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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} else 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.empty()) {
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// If there is a wal_dir already set, check to see if the wal_dir is the
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// same as the dbname AND the same as the db_path[0] (which must exist from
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// a few lines ago). If the wal_dir matches both of these values, then clear
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// the wal_dir value, which will make wal_dir == dbname. Most likely this
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// condition was the result of reading an old options file where we forced
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// wal_dir to be set (to dbname).
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auto npath = NormalizePath(dbname + "/");
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if (npath == NormalizePath(result.wal_dir + "/") &&
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npath == NormalizePath(result.db_paths[0].path + "/")) {
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result.wal_dir.clear();
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}
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}
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if (!result.wal_dir.empty() && 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.use_direct_reads && result.compaction_readahead_size == 0) {
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TEST_SYNC_POINT_CALLBACK("SanitizeOptions:direct_io", nullptr);
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result.compaction_readahead_size = 1024 * 1024 * 2;
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}
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// Force flush on DB open if 2PC is enabled, since with 2PC we have no
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// guarantee that consecutive log files have consecutive sequence id, which
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// make recovery complicated.
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if (result.allow_2pc) {
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result.avoid_flush_during_recovery = false;
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}
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#ifndef ROCKSDB_LITE
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ImmutableDBOptions immutable_db_options(result);
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if (!immutable_db_options.IsWalDirSameAsDBPath()) {
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// Either the WAL dir and db_paths[0]/db_name are not the same, or we
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// cannot tell for sure. In either case, assume they're different and
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// explicitly cleanup the trash log files (bypass DeleteScheduler)
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// Do this first so even if we end up calling
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// DeleteScheduler::CleanupDirectory on the same dir later, it will be
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// safe
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std::vector<std::string> filenames;
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auto wal_dir = immutable_db_options.GetWalDir();
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Status s = result.env->GetChildren(wal_dir, &filenames);
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s.PermitUncheckedError(); //**TODO: What to do on error?
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for (std::string& filename : filenames) {
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if (filename.find(".log.trash", filename.length() -
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std::string(".log.trash").length()) !=
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std::string::npos) {
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std::string trash_file = wal_dir + "/" + filename;
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result.env->DeleteFile(trash_file).PermitUncheckedError();
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}
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}
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}
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// When the DB is stopped, it's possible that there are some .trash files that
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// were not deleted yet, when we open the DB we will find these .trash files
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// and schedule them to be deleted (or delete immediately if SstFileManager
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// was not used)
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auto sfm = static_cast<SstFileManagerImpl*>(result.sst_file_manager.get());
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for (size_t i = 0; i < result.db_paths.size(); i++) {
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DeleteScheduler::CleanupDirectory(result.env, sfm, result.db_paths[i].path)
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.PermitUncheckedError();
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}
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// Create a default SstFileManager for purposes of tracking compaction size
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// and facilitating recovery from out of space errors.
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if (result.sst_file_manager.get() == nullptr) {
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std::shared_ptr<SstFileManager> sst_file_manager(
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NewSstFileManager(result.env, result.info_log));
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result.sst_file_manager = sst_file_manager;
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}
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#endif // !ROCKSDB_LITE
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// Supported wal compression types
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if (!StreamingCompressionTypeSupported(result.wal_compression)) {
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result.wal_compression = kNoCompression;
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ROCKS_LOG_WARN(result.info_log,
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"wal_compression is disabled since only zstd is supported");
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}
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if (!result.paranoid_checks) {
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result.skip_checking_sst_file_sizes_on_db_open = true;
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ROCKS_LOG_INFO(result.info_log,
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"file size check will be skipped during open.");
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}
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return result;
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}
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namespace {
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Status ValidateOptionsByTable(
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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 = ValidateOptions(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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} // namespace
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Status DBImpl::ValidateOptions(
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const DBOptions& db_options,
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const std::vector<ColumnFamilyDescriptor>& column_families) {
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Status s;
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for (auto& cfd : column_families) {
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s = ColumnFamilyData::ValidateOptions(db_options, cfd.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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s = ValidateOptions(db_options);
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return s;
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}
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Status DBImpl::ValidateOptions(const DBOptions& db_options) {
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if (db_options.db_paths.size() > 4) {
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return Status::NotSupported(
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"More than four DB paths are not supported yet. ");
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}
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if (db_options.allow_mmap_reads && db_options.use_direct_reads) {
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// Protect against assert in PosixMMapReadableFile constructor
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return Status::NotSupported(
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"If memory mapped reads (allow_mmap_reads) are enabled "
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"then direct I/O reads (use_direct_reads) must be disabled. ");
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}
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if (db_options.allow_mmap_writes &&
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db_options.use_direct_io_for_flush_and_compaction) {
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return Status::NotSupported(
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"If memory mapped writes (allow_mmap_writes) are enabled "
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"then direct I/O writes (use_direct_io_for_flush_and_compaction) must "
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"be disabled. ");
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}
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if (db_options.keep_log_file_num == 0) {
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return Status::InvalidArgument("keep_log_file_num must be greater than 0");
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}
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if (db_options.unordered_write &&
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!db_options.allow_concurrent_memtable_write) {
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return Status::InvalidArgument(
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"unordered_write is incompatible with !allow_concurrent_memtable_write");
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}
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if (db_options.unordered_write && db_options.enable_pipelined_write) {
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return Status::InvalidArgument(
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"unordered_write is incompatible with enable_pipelined_write");
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}
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if (db_options.atomic_flush && db_options.enable_pipelined_write) {
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return Status::InvalidArgument(
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"atomic_flush is incompatible with enable_pipelined_write");
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}
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// TODO remove this restriction
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if (db_options.atomic_flush && db_options.best_efforts_recovery) {
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return Status::InvalidArgument(
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"atomic_flush is currently incompatible with best-efforts recovery");
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}
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if (db_options.use_direct_io_for_flush_and_compaction &&
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0 == db_options.writable_file_max_buffer_size) {
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return Status::InvalidArgument(
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"writes in direct IO require writable_file_max_buffer_size > 0");
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}
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return Status::OK();
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}
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Status DBImpl::NewDB(std::vector<std::string>* new_filenames) {
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VersionEdit new_db;
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Status s = SetIdentityFile(env_, dbname_);
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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_.write_dbid_to_manifest) {
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std::string temp_db_id;
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GetDbIdentityFromIdentityFile(&temp_db_id);
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new_db.SetDBId(temp_db_id);
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}
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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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ROCKS_LOG_INFO(immutable_db_options_.info_log, "Creating manifest 1 \n");
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const std::string manifest = DescriptorFileName(dbname_, 1);
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{
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if (fs_->FileExists(manifest, IOOptions(), nullptr).ok()) {
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fs_->DeleteFile(manifest, IOOptions(), nullptr).PermitUncheckedError();
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}
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std::unique_ptr<FSWritableFile> file;
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FileOptions file_options = fs_->OptimizeForManifestWrite(file_options_);
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s = NewWritableFile(fs_.get(), manifest, &file, file_options);
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if (!s.ok()) {
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return s;
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}
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FileTypeSet tmp_set = immutable_db_options_.checksum_handoff_file_types;
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file->SetPreallocationBlockSize(
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immutable_db_options_.manifest_preallocation_size);
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std::unique_ptr<WritableFileWriter> file_writer(new WritableFileWriter(
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std::move(file), manifest, file_options, immutable_db_options_.clock,
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io_tracer_, nullptr /* stats */, immutable_db_options_.listeners,
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nullptr, tmp_set.Contains(FileType::kDescriptorFile),
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tmp_set.Contains(FileType::kDescriptorFile)));
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log::Writer log(std::move(file_writer), 0, false);
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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(&immutable_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(fs_.get(), dbname_, 1, directories_.GetDbDir());
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if (new_filenames) {
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new_filenames->emplace_back(
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manifest.substr(manifest.find_last_of("/\\") + 1));
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}
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} else {
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fs_->DeleteFile(manifest, IOOptions(), nullptr).PermitUncheckedError();
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}
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return s;
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}
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IOStatus DBImpl::CreateAndNewDirectory(
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FileSystem* fs, const std::string& dirname,
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std::unique_ptr<FSDirectory>* directory) {
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// We call CreateDirIfMissing() as the directory may already exist (if we
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// are reopening a DB), when this happens we don't want creating the
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// directory to cause an error. However, we need to check if creating the
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// directory fails or else we may get an obscure message about the lock
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// file not existing. One real-world example of this occurring is if
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// env->CreateDirIfMissing() doesn't create intermediate directories, e.g.
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// when dbname_ is "dir/db" but when "dir" doesn't exist.
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IOStatus io_s = fs->CreateDirIfMissing(dirname, IOOptions(), nullptr);
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if (!io_s.ok()) {
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return io_s;
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}
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return fs->NewDirectory(dirname, IOOptions(), directory, nullptr);
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}
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IOStatus Directories::SetDirectories(FileSystem* fs, const std::string& dbname,
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const std::string& wal_dir,
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const std::vector<DbPath>& data_paths) {
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IOStatus io_s = DBImpl::CreateAndNewDirectory(fs, dbname, &db_dir_);
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if (!io_s.ok()) {
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return io_s;
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}
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if (!wal_dir.empty() && dbname != wal_dir) {
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io_s = DBImpl::CreateAndNewDirectory(fs, wal_dir, &wal_dir_);
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if (!io_s.ok()) {
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return io_s;
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}
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}
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data_dirs_.clear();
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for (auto& p : data_paths) {
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const std::string db_path = p.path;
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if (db_path == dbname) {
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data_dirs_.emplace_back(nullptr);
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} else {
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std::unique_ptr<FSDirectory> path_directory;
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io_s = DBImpl::CreateAndNewDirectory(fs, db_path, &path_directory);
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if (!io_s.ok()) {
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return io_s;
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}
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data_dirs_.emplace_back(path_directory.release());
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}
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}
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assert(data_dirs_.size() == data_paths.size());
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return IOStatus::OK();
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}
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Status DBImpl::Recover(
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const std::vector<ColumnFamilyDescriptor>& column_families, bool read_only,
|
|
bool error_if_wal_file_exists, bool error_if_data_exists_in_wals,
|
|
uint64_t* recovered_seq, RecoveryContext* recovery_ctx) {
|
|
mutex_.AssertHeld();
|
|
|
|
bool is_new_db = false;
|
|
assert(db_lock_ == nullptr);
|
|
std::vector<std::string> files_in_dbname;
|
|
if (!read_only) {
|
|
Status s = directories_.SetDirectories(fs_.get(), dbname_,
|
|
immutable_db_options_.wal_dir,
|
|
immutable_db_options_.db_paths);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
s = env_->LockFile(LockFileName(dbname_), &db_lock_);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
std::string current_fname = CurrentFileName(dbname_);
|
|
// Path to any MANIFEST file in the db dir. It does not matter which one.
|
|
// Since best-efforts recovery ignores CURRENT file, existence of a
|
|
// MANIFEST indicates the recovery to recover existing db. If no MANIFEST
|
|
// can be found, a new db will be created.
|
|
std::string manifest_path;
|
|
if (!immutable_db_options_.best_efforts_recovery) {
|
|
s = env_->FileExists(current_fname);
|
|
} else {
|
|
s = Status::NotFound();
|
|
Status io_s = env_->GetChildren(dbname_, &files_in_dbname);
|
|
if (!io_s.ok()) {
|
|
s = io_s;
|
|
files_in_dbname.clear();
|
|
}
|
|
for (const std::string& file : files_in_dbname) {
|
|
uint64_t number = 0;
|
|
FileType type = kWalFile; // initialize
|
|
if (ParseFileName(file, &number, &type) && type == kDescriptorFile) {
|
|
uint64_t bytes;
|
|
s = env_->GetFileSize(DescriptorFileName(dbname_, number), &bytes);
|
|
if (s.ok() && bytes != 0) {
|
|
// Found non-empty MANIFEST (descriptor log), thus best-efforts
|
|
// recovery does not have to treat the db as empty.
|
|
manifest_path = dbname_ + "/" + file;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (s.IsNotFound()) {
|
|
if (immutable_db_options_.create_if_missing) {
|
|
s = NewDB(&files_in_dbname);
|
|
is_new_db = true;
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
} else {
|
|
return Status::InvalidArgument(
|
|
current_fname, "does not exist (create_if_missing is false)");
|
|
}
|
|
} else if (s.ok()) {
|
|
if (immutable_db_options_.error_if_exists) {
|
|
return Status::InvalidArgument(dbname_,
|
|
"exists (error_if_exists is true)");
|
|
}
|
|
} else {
|
|
// Unexpected error reading file
|
|
assert(s.IsIOError());
|
|
return s;
|
|
}
|
|
// Verify compatibility of file_options_ and filesystem
|
|
{
|
|
std::unique_ptr<FSRandomAccessFile> idfile;
|
|
FileOptions customized_fs(file_options_);
|
|
customized_fs.use_direct_reads |=
|
|
immutable_db_options_.use_direct_io_for_flush_and_compaction;
|
|
const std::string& fname =
|
|
manifest_path.empty() ? current_fname : manifest_path;
|
|
s = fs_->NewRandomAccessFile(fname, customized_fs, &idfile, nullptr);
|
|
if (!s.ok()) {
|
|
std::string error_str = s.ToString();
|
|
// Check if unsupported Direct I/O is the root cause
|
|
customized_fs.use_direct_reads = false;
|
|
s = fs_->NewRandomAccessFile(fname, customized_fs, &idfile, nullptr);
|
|
if (s.ok()) {
|
|
return Status::InvalidArgument(
|
|
"Direct I/O is not supported by the specified DB.");
|
|
} else {
|
|
return Status::InvalidArgument(
|
|
"Found options incompatible with filesystem", error_str.c_str());
|
|
}
|
|
}
|
|
}
|
|
} else if (immutable_db_options_.best_efforts_recovery) {
|
|
assert(files_in_dbname.empty());
|
|
Status s = env_->GetChildren(dbname_, &files_in_dbname);
|
|
if (s.IsNotFound()) {
|
|
return Status::InvalidArgument(dbname_,
|
|
"does not exist (open for read only)");
|
|
} else if (s.IsIOError()) {
|
|
return s;
|
|
}
|
|
assert(s.ok());
|
|
}
|
|
assert(db_id_.empty());
|
|
Status s;
|
|
bool missing_table_file = false;
|
|
if (!immutable_db_options_.best_efforts_recovery) {
|
|
s = versions_->Recover(column_families, read_only, &db_id_);
|
|
} else {
|
|
assert(!files_in_dbname.empty());
|
|
s = versions_->TryRecover(column_families, read_only, files_in_dbname,
|
|
&db_id_, &missing_table_file);
|
|
if (s.ok()) {
|
|
// TryRecover may delete previous column_family_set_.
|
|
column_family_memtables_.reset(
|
|
new ColumnFamilyMemTablesImpl(versions_->GetColumnFamilySet()));
|
|
}
|
|
}
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
s = SetupDBId(read_only, recovery_ctx);
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "DB ID: %s\n", db_id_.c_str());
|
|
if (s.ok() && !read_only) {
|
|
s = DeleteUnreferencedSstFiles(recovery_ctx);
|
|
}
|
|
|
|
if (immutable_db_options_.paranoid_checks && s.ok()) {
|
|
s = CheckConsistency();
|
|
}
|
|
if (s.ok() && !read_only) {
|
|
// TODO: share file descriptors (FSDirectory) with SetDirectories above
|
|
std::map<std::string, std::shared_ptr<FSDirectory>> created_dirs;
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
s = cfd->AddDirectories(&created_dirs);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
}
|
|
}
|
|
|
|
std::vector<std::string> files_in_wal_dir;
|
|
if (s.ok()) {
|
|
// Initial max_total_in_memory_state_ before recovery wals. Log recovery
|
|
// may check this value to decide whether to flush.
|
|
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;
|
|
}
|
|
|
|
SequenceNumber next_sequence(kMaxSequenceNumber);
|
|
default_cf_handle_ = new ColumnFamilyHandleImpl(
|
|
versions_->GetColumnFamilySet()->GetDefault(), this, &mutex_);
|
|
default_cf_internal_stats_ = default_cf_handle_->cfd()->internal_stats();
|
|
|
|
// 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.
|
|
auto wal_dir = immutable_db_options_.GetWalDir();
|
|
if (!immutable_db_options_.best_efforts_recovery) {
|
|
s = env_->GetChildren(wal_dir, &files_in_wal_dir);
|
|
}
|
|
if (s.IsNotFound()) {
|
|
return Status::InvalidArgument("wal_dir not found", wal_dir);
|
|
} else if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
std::unordered_map<uint64_t, std::string> wal_files;
|
|
for (const auto& file : files_in_wal_dir) {
|
|
uint64_t number;
|
|
FileType type;
|
|
if (ParseFileName(file, &number, &type) && type == kWalFile) {
|
|
if (is_new_db) {
|
|
return Status::Corruption(
|
|
"While creating a new Db, wal_dir contains "
|
|
"existing log file: ",
|
|
file);
|
|
} else {
|
|
wal_files[number] = LogFileName(wal_dir, number);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (immutable_db_options_.track_and_verify_wals_in_manifest) {
|
|
if (!immutable_db_options_.best_efforts_recovery) {
|
|
// Verify WALs in MANIFEST.
|
|
s = versions_->GetWalSet().CheckWals(env_, wal_files);
|
|
} // else since best effort recovery does not recover from WALs, no need
|
|
// to check WALs.
|
|
} else if (!versions_->GetWalSet().GetWals().empty()) {
|
|
// Tracking is disabled, clear previously tracked WALs from MANIFEST,
|
|
// otherwise, in the future, if WAL tracking is enabled again,
|
|
// since the WALs deleted when WAL tracking is disabled are not persisted
|
|
// into MANIFEST, WAL check may fail.
|
|
VersionEdit edit;
|
|
WalNumber max_wal_number =
|
|
versions_->GetWalSet().GetWals().rbegin()->first;
|
|
edit.DeleteWalsBefore(max_wal_number + 1);
|
|
assert(recovery_ctx != nullptr);
|
|
assert(versions_->GetColumnFamilySet() != nullptr);
|
|
recovery_ctx->UpdateVersionEdits(
|
|
versions_->GetColumnFamilySet()->GetDefault(), edit);
|
|
}
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
if (!wal_files.empty()) {
|
|
if (error_if_wal_file_exists) {
|
|
return Status::Corruption(
|
|
"The db was opened in readonly mode with error_if_wal_file_exists"
|
|
"flag but a WAL file already exists");
|
|
} else if (error_if_data_exists_in_wals) {
|
|
for (auto& wal_file : wal_files) {
|
|
uint64_t bytes;
|
|
s = env_->GetFileSize(wal_file.second, &bytes);
|
|
if (s.ok()) {
|
|
if (bytes > 0) {
|
|
return Status::Corruption(
|
|
"error_if_data_exists_in_wals is set but there are data "
|
|
" in WAL files.");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!wal_files.empty()) {
|
|
// Recover in the order in which the wals were generated
|
|
std::vector<uint64_t> wals;
|
|
wals.reserve(wal_files.size());
|
|
for (const auto& wal_file : wal_files) {
|
|
wals.push_back(wal_file.first);
|
|
}
|
|
std::sort(wals.begin(), wals.end());
|
|
|
|
bool corrupted_wal_found = false;
|
|
s = RecoverLogFiles(wals, &next_sequence, read_only, &corrupted_wal_found,
|
|
recovery_ctx);
|
|
if (corrupted_wal_found && recovered_seq != nullptr) {
|
|
*recovered_seq = next_sequence;
|
|
}
|
|
if (!s.ok()) {
|
|
// Clear memtables if recovery failed
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
cfd->CreateNewMemtable(*cfd->GetLatestMutableCFOptions(),
|
|
kMaxSequenceNumber);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (read_only) {
|
|
// If we are opening as read-only, we need to update options_file_number_
|
|
// to reflect the most recent OPTIONS file. It does not matter for regular
|
|
// read-write db instance because options_file_number_ will later be
|
|
// updated to versions_->NewFileNumber() in RenameTempFileToOptionsFile.
|
|
std::vector<std::string> filenames;
|
|
if (s.ok()) {
|
|
const std::string normalized_dbname = NormalizePath(dbname_);
|
|
const std::string normalized_wal_dir =
|
|
NormalizePath(immutable_db_options_.GetWalDir());
|
|
if (immutable_db_options_.best_efforts_recovery) {
|
|
filenames = std::move(files_in_dbname);
|
|
} else if (normalized_dbname == normalized_wal_dir) {
|
|
filenames = std::move(files_in_wal_dir);
|
|
} else {
|
|
s = env_->GetChildren(GetName(), &filenames);
|
|
}
|
|
}
|
|
if (s.ok()) {
|
|
uint64_t number = 0;
|
|
uint64_t options_file_number = 0;
|
|
FileType type;
|
|
for (const auto& fname : filenames) {
|
|
if (ParseFileName(fname, &number, &type) && type == kOptionsFile) {
|
|
options_file_number = std::max(number, options_file_number);
|
|
}
|
|
}
|
|
versions_->options_file_number_ = options_file_number;
|
|
uint64_t options_file_size = 0;
|
|
if (options_file_number > 0) {
|
|
s = env_->GetFileSize(OptionsFileName(GetName(), options_file_number),
|
|
&options_file_size);
|
|
}
|
|
versions_->options_file_size_ = options_file_size;
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::PersistentStatsProcessFormatVersion() {
|
|
mutex_.AssertHeld();
|
|
Status s;
|
|
// persist version when stats CF doesn't exist
|
|
bool should_persist_format_version = !persistent_stats_cfd_exists_;
|
|
mutex_.Unlock();
|
|
if (persistent_stats_cfd_exists_) {
|
|
// Check persistent stats format version compatibility. Drop and recreate
|
|
// persistent stats CF if format version is incompatible
|
|
uint64_t format_version_recovered = 0;
|
|
Status s_format = DecodePersistentStatsVersionNumber(
|
|
this, StatsVersionKeyType::kFormatVersion, &format_version_recovered);
|
|
uint64_t compatible_version_recovered = 0;
|
|
Status s_compatible = DecodePersistentStatsVersionNumber(
|
|
this, StatsVersionKeyType::kCompatibleVersion,
|
|
&compatible_version_recovered);
|
|
// abort reading from existing stats CF if any of following is true:
|
|
// 1. failed to read format version or compatible version from disk
|
|
// 2. sst's format version is greater than current format version, meaning
|
|
// this sst is encoded with a newer RocksDB release, and current compatible
|
|
// version is below the sst's compatible version
|
|
if (!s_format.ok() || !s_compatible.ok() ||
|
|
(kStatsCFCurrentFormatVersion < format_version_recovered &&
|
|
kStatsCFCompatibleFormatVersion < compatible_version_recovered)) {
|
|
if (!s_format.ok() || !s_compatible.ok()) {
|
|
ROCKS_LOG_WARN(
|
|
immutable_db_options_.info_log,
|
|
"Recreating persistent stats column family since reading "
|
|
"persistent stats version key failed. Format key: %s, compatible "
|
|
"key: %s",
|
|
s_format.ToString().c_str(), s_compatible.ToString().c_str());
|
|
} else {
|
|
ROCKS_LOG_WARN(
|
|
immutable_db_options_.info_log,
|
|
"Recreating persistent stats column family due to corrupted or "
|
|
"incompatible format version. Recovered format: %" PRIu64
|
|
"; recovered format compatible since: %" PRIu64 "\n",
|
|
format_version_recovered, compatible_version_recovered);
|
|
}
|
|
s = DropColumnFamily(persist_stats_cf_handle_);
|
|
if (s.ok()) {
|
|
s = DestroyColumnFamilyHandle(persist_stats_cf_handle_);
|
|
}
|
|
ColumnFamilyHandle* handle = nullptr;
|
|
if (s.ok()) {
|
|
ColumnFamilyOptions cfo;
|
|
OptimizeForPersistentStats(&cfo);
|
|
s = CreateColumnFamily(cfo, kPersistentStatsColumnFamilyName, &handle);
|
|
}
|
|
if (s.ok()) {
|
|
persist_stats_cf_handle_ = static_cast<ColumnFamilyHandleImpl*>(handle);
|
|
// should also persist version here because old stats CF is discarded
|
|
should_persist_format_version = true;
|
|
}
|
|
}
|
|
}
|
|
if (should_persist_format_version) {
|
|
// Persistent stats CF being created for the first time, need to write
|
|
// format version key
|
|
WriteBatch batch;
|
|
if (s.ok()) {
|
|
s = batch.Put(persist_stats_cf_handle_, kFormatVersionKeyString,
|
|
std::to_string(kStatsCFCurrentFormatVersion));
|
|
}
|
|
if (s.ok()) {
|
|
s = batch.Put(persist_stats_cf_handle_, kCompatibleVersionKeyString,
|
|
std::to_string(kStatsCFCompatibleFormatVersion));
|
|
}
|
|
if (s.ok()) {
|
|
WriteOptions wo;
|
|
wo.low_pri = true;
|
|
wo.no_slowdown = true;
|
|
wo.sync = false;
|
|
s = Write(wo, &batch);
|
|
}
|
|
}
|
|
mutex_.Lock();
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::InitPersistStatsColumnFamily() {
|
|
mutex_.AssertHeld();
|
|
assert(!persist_stats_cf_handle_);
|
|
ColumnFamilyData* persistent_stats_cfd =
|
|
versions_->GetColumnFamilySet()->GetColumnFamily(
|
|
kPersistentStatsColumnFamilyName);
|
|
persistent_stats_cfd_exists_ = persistent_stats_cfd != nullptr;
|
|
|
|
Status s;
|
|
if (persistent_stats_cfd != nullptr) {
|
|
// We are recovering from a DB which already contains persistent stats CF,
|
|
// the CF is already created in VersionSet::ApplyOneVersionEdit, but
|
|
// column family handle was not. Need to explicitly create handle here.
|
|
persist_stats_cf_handle_ =
|
|
new ColumnFamilyHandleImpl(persistent_stats_cfd, this, &mutex_);
|
|
} else {
|
|
mutex_.Unlock();
|
|
ColumnFamilyHandle* handle = nullptr;
|
|
ColumnFamilyOptions cfo;
|
|
OptimizeForPersistentStats(&cfo);
|
|
s = CreateColumnFamily(cfo, kPersistentStatsColumnFamilyName, &handle);
|
|
persist_stats_cf_handle_ = static_cast<ColumnFamilyHandleImpl*>(handle);
|
|
mutex_.Lock();
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::LogAndApplyForRecovery(const RecoveryContext& recovery_ctx) {
|
|
mutex_.AssertHeld();
|
|
assert(versions_->descriptor_log_ == nullptr);
|
|
Status s = versions_->LogAndApply(
|
|
recovery_ctx.cfds_, recovery_ctx.mutable_cf_opts_,
|
|
recovery_ctx.edit_lists_, &mutex_, directories_.GetDbDir());
|
|
if (s.ok() && !(recovery_ctx.files_to_delete_.empty())) {
|
|
mutex_.Unlock();
|
|
for (const auto& fname : recovery_ctx.files_to_delete_) {
|
|
s = env_->DeleteFile(fname);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
mutex_.Lock();
|
|
}
|
|
return s;
|
|
}
|
|
|
|
void DBImpl::InvokeWalFilterIfNeededOnColumnFamilyToWalNumberMap() {
|
|
#ifndef ROCKSDB_LITE
|
|
if (immutable_db_options_.wal_filter == nullptr) {
|
|
return;
|
|
}
|
|
assert(immutable_db_options_.wal_filter != nullptr);
|
|
WalFilter& wal_filter = *(immutable_db_options_.wal_filter);
|
|
|
|
std::map<std::string, uint32_t> cf_name_id_map;
|
|
std::map<uint32_t, uint64_t> cf_lognumber_map;
|
|
assert(versions_);
|
|
assert(versions_->GetColumnFamilySet());
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
assert(cfd);
|
|
cf_name_id_map.insert(std::make_pair(cfd->GetName(), cfd->GetID()));
|
|
cf_lognumber_map.insert(std::make_pair(cfd->GetID(), cfd->GetLogNumber()));
|
|
}
|
|
|
|
wal_filter.ColumnFamilyLogNumberMap(cf_lognumber_map, cf_name_id_map);
|
|
#endif // !ROCKSDB_LITE
|
|
}
|
|
|
|
bool DBImpl::InvokeWalFilterIfNeededOnWalRecord(uint64_t wal_number,
|
|
const std::string& wal_fname,
|
|
log::Reader::Reporter& reporter,
|
|
Status& status,
|
|
bool& stop_replay,
|
|
WriteBatch& batch) {
|
|
#ifndef ROCKSDB_LITE
|
|
if (immutable_db_options_.wal_filter == nullptr) {
|
|
return true;
|
|
}
|
|
assert(immutable_db_options_.wal_filter != nullptr);
|
|
WalFilter& wal_filter = *(immutable_db_options_.wal_filter);
|
|
|
|
WriteBatch new_batch;
|
|
bool batch_changed = false;
|
|
|
|
bool process_current_record = true;
|
|
|
|
WalFilter::WalProcessingOption wal_processing_option =
|
|
wal_filter.LogRecordFound(wal_number, wal_fname, batch, &new_batch,
|
|
&batch_changed);
|
|
|
|
switch (wal_processing_option) {
|
|
case WalFilter::WalProcessingOption::kContinueProcessing:
|
|
// do nothing, proceeed normally
|
|
break;
|
|
case WalFilter::WalProcessingOption::kIgnoreCurrentRecord:
|
|
// skip current record
|
|
process_current_record = false;
|
|
break;
|
|
case WalFilter::WalProcessingOption::kStopReplay:
|
|
// skip current record and stop replay
|
|
process_current_record = false;
|
|
stop_replay = true;
|
|
break;
|
|
case WalFilter::WalProcessingOption::kCorruptedRecord: {
|
|
status = Status::Corruption("Corruption reported by Wal Filter ",
|
|
wal_filter.Name());
|
|
MaybeIgnoreError(&status);
|
|
if (!status.ok()) {
|
|
process_current_record = false;
|
|
reporter.Corruption(batch.GetDataSize(), status);
|
|
}
|
|
break;
|
|
}
|
|
default: {
|
|
// logical error which should not happen. If RocksDB throws, we would
|
|
// just do `throw std::logic_error`.
|
|
assert(false);
|
|
status = Status::NotSupported(
|
|
"Unknown WalProcessingOption returned by Wal Filter ",
|
|
wal_filter.Name());
|
|
MaybeIgnoreError(&status);
|
|
if (!status.ok()) {
|
|
// Ignore the error with current record processing.
|
|
stop_replay = true;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!process_current_record) {
|
|
return false;
|
|
}
|
|
|
|
if (batch_changed) {
|
|
// Make sure that the count in the new batch is
|
|
// within the orignal count.
|
|
int new_count = WriteBatchInternal::Count(&new_batch);
|
|
int original_count = WriteBatchInternal::Count(&batch);
|
|
if (new_count > original_count) {
|
|
ROCKS_LOG_FATAL(
|
|
immutable_db_options_.info_log,
|
|
"Recovering log #%" PRIu64
|
|
" mode %d log filter %s returned "
|
|
"more records (%d) than original (%d) which is not allowed. "
|
|
"Aborting recovery.",
|
|
wal_number, static_cast<int>(immutable_db_options_.wal_recovery_mode),
|
|
wal_filter.Name(), new_count, original_count);
|
|
status = Status::NotSupported(
|
|
"More than original # of records "
|
|
"returned by Wal Filter ",
|
|
wal_filter.Name());
|
|
return false;
|
|
}
|
|
// Set the same sequence number in the new_batch
|
|
// as the original batch.
|
|
WriteBatchInternal::SetSequence(&new_batch,
|
|
WriteBatchInternal::Sequence(&batch));
|
|
batch = new_batch;
|
|
}
|
|
return true;
|
|
#else // !ROCKSDB_LITE
|
|
(void)wal_number;
|
|
(void)wal_fname;
|
|
(void)reporter;
|
|
(void)status;
|
|
(void)stop_replay;
|
|
(void)batch;
|
|
return true;
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
// REQUIRES: wal_numbers are sorted in ascending order
|
|
Status DBImpl::RecoverLogFiles(const std::vector<uint64_t>& wal_numbers,
|
|
SequenceNumber* next_sequence, bool read_only,
|
|
bool* corrupted_wal_found,
|
|
RecoveryContext* recovery_ctx) {
|
|
struct LogReporter : public log::Reader::Reporter {
|
|
Env* env;
|
|
Logger* info_log;
|
|
const char* fname;
|
|
Status* status; // nullptr if immutable_db_options_.paranoid_checks==false
|
|
void Corruption(size_t bytes, const Status& s) override {
|
|
ROCKS_LOG_WARN(info_log, "%s%s: dropping %d bytes; %s",
|
|
(status == nullptr ? "(ignoring error) " : ""), fname,
|
|
static_cast<int>(bytes), s.ToString().c_str());
|
|
if (status != nullptr && status->ok()) {
|
|
*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 << "wal_files";
|
|
stream.StartArray();
|
|
for (auto wal_number : wal_numbers) {
|
|
stream << wal_number;
|
|
}
|
|
stream.EndArray();
|
|
}
|
|
|
|
// No-op for immutable_db_options_.wal_filter == nullptr.
|
|
InvokeWalFilterIfNeededOnColumnFamilyToWalNumberMap();
|
|
|
|
bool stop_replay_by_wal_filter = false;
|
|
bool stop_replay_for_corruption = false;
|
|
bool flushed = false;
|
|
uint64_t corrupted_wal_number = kMaxSequenceNumber;
|
|
uint64_t min_wal_number = MinLogNumberToKeep();
|
|
if (!allow_2pc()) {
|
|
// In non-2pc mode, we skip WALs that do not back unflushed data.
|
|
min_wal_number =
|
|
std::max(min_wal_number, versions_->MinLogNumberWithUnflushedData());
|
|
}
|
|
for (auto wal_number : wal_numbers) {
|
|
if (wal_number < min_wal_number) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Skipping log #%" PRIu64
|
|
" since it is older than min log to keep #%" PRIu64,
|
|
wal_number, min_wal_number);
|
|
continue;
|
|
}
|
|
// 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_->MarkFileNumberUsed(wal_number);
|
|
// Open the log file
|
|
std::string fname =
|
|
LogFileName(immutable_db_options_.GetWalDir(), wal_number);
|
|
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Recovering log #%" PRIu64 " mode %d", wal_number,
|
|
static_cast<int>(immutable_db_options_.wal_recovery_mode));
|
|
auto logFileDropped = [this, &fname]() {
|
|
uint64_t bytes;
|
|
if (env_->GetFileSize(fname, &bytes).ok()) {
|
|
auto info_log = immutable_db_options_.info_log.get();
|
|
ROCKS_LOG_WARN(info_log, "%s: dropping %d bytes", fname.c_str(),
|
|
static_cast<int>(bytes));
|
|
}
|
|
};
|
|
if (stop_replay_by_wal_filter) {
|
|
logFileDropped();
|
|
continue;
|
|
}
|
|
|
|
std::unique_ptr<SequentialFileReader> file_reader;
|
|
{
|
|
std::unique_ptr<FSSequentialFile> file;
|
|
status = fs_->NewSequentialFile(fname,
|
|
fs_->OptimizeForLogRead(file_options_),
|
|
&file, nullptr);
|
|
if (!status.ok()) {
|
|
MaybeIgnoreError(&status);
|
|
if (!status.ok()) {
|
|
return status;
|
|
} else {
|
|
// Fail with one log file, but that's ok.
|
|
// Try next one.
|
|
continue;
|
|
}
|
|
}
|
|
file_reader.reset(new SequentialFileReader(
|
|
std::move(file), fname, immutable_db_options_.log_readahead_size,
|
|
io_tracer_));
|
|
}
|
|
|
|
// Create the log reader.
|
|
LogReporter reporter;
|
|
reporter.env = env_;
|
|
reporter.info_log = immutable_db_options_.info_log.get();
|
|
reporter.fname = fname.c_str();
|
|
if (!immutable_db_options_.paranoid_checks ||
|
|
immutable_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(immutable_db_options_.info_log, std::move(file_reader),
|
|
&reporter, true /*checksum*/, wal_number);
|
|
|
|
// Determine if we should tolerate incomplete records at the tail end of the
|
|
// Read all the records and add to a memtable
|
|
std::string scratch;
|
|
Slice record;
|
|
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::RecoverLogFiles:BeforeReadWal",
|
|
/*arg=*/nullptr);
|
|
uint64_t record_checksum;
|
|
while (!stop_replay_by_wal_filter &&
|
|
reader.ReadRecord(&record, &scratch,
|
|
immutable_db_options_.wal_recovery_mode,
|
|
&record_checksum) &&
|
|
status.ok()) {
|
|
if (record.size() < WriteBatchInternal::kHeader) {
|
|
reporter.Corruption(record.size(),
|
|
Status::Corruption("log record too small"));
|
|
continue;
|
|
}
|
|
|
|
// We create a new batch and initialize with a valid prot_info_ to store
|
|
// the data checksums
|
|
WriteBatch batch;
|
|
|
|
status = WriteBatchInternal::SetContents(&batch, record);
|
|
if (!status.ok()) {
|
|
return status;
|
|
}
|
|
TEST_SYNC_POINT_CALLBACK(
|
|
"DBImpl::RecoverLogFiles:BeforeUpdateProtectionInfo:batch", &batch);
|
|
TEST_SYNC_POINT_CALLBACK(
|
|
"DBImpl::RecoverLogFiles:BeforeUpdateProtectionInfo:checksum",
|
|
&record_checksum);
|
|
status = WriteBatchInternal::UpdateProtectionInfo(
|
|
&batch, 8 /* bytes_per_key */, &record_checksum);
|
|
if (!status.ok()) {
|
|
return status;
|
|
}
|
|
|
|
SequenceNumber sequence = WriteBatchInternal::Sequence(&batch);
|
|
|
|
if (immutable_db_options_.wal_recovery_mode ==
|
|
WALRecoveryMode::kPointInTimeRecovery) {
|
|
// In point-in-time recovery mode, if sequence id of log files are
|
|
// consecutive, we continue recovery despite corruption. This could
|
|
// happen when we open and write to a corrupted DB, where sequence id
|
|
// will start from the last sequence id we recovered.
|
|
if (sequence == *next_sequence) {
|
|
stop_replay_for_corruption = false;
|
|
}
|
|
if (stop_replay_for_corruption) {
|
|
logFileDropped();
|
|
break;
|
|
}
|
|
}
|
|
|
|
// For the default case of wal_filter == nullptr, always performs no-op
|
|
// and returns true.
|
|
if (!InvokeWalFilterIfNeededOnWalRecord(wal_number, fname, reporter,
|
|
status, stop_replay_by_wal_filter,
|
|
batch)) {
|
|
continue;
|
|
}
|
|
|
|
// 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
|
|
bool has_valid_writes = false;
|
|
status = WriteBatchInternal::InsertInto(
|
|
&batch, column_family_memtables_.get(), &flush_scheduler_,
|
|
&trim_history_scheduler_, true, wal_number, this,
|
|
false /* concurrent_memtable_writes */, next_sequence,
|
|
&has_valid_writes, seq_per_batch_, batch_per_txn_);
|
|
MaybeIgnoreError(&status);
|
|
if (!status.ok()) {
|
|
// We are treating this as a failure while reading since we read valid
|
|
// blocks that do not form coherent data
|
|
reporter.Corruption(record.size(), status);
|
|
continue;
|
|
}
|
|
|
|
if (has_valid_writes && !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_.TakeNextColumnFamily()) != nullptr) {
|
|
cfd->UnrefAndTryDelete();
|
|
// If this asserts, it means that InsertInto failed in
|
|
// filtering updates to already-flushed column families
|
|
assert(cfd->GetLogNumber() <= wal_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;
|
|
}
|
|
flushed = true;
|
|
|
|
cfd->CreateNewMemtable(*cfd->GetLatestMutableCFOptions(),
|
|
*next_sequence);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!status.ok()) {
|
|
if (status.IsNotSupported()) {
|
|
// We should not treat NotSupported as corruption. It is rather a clear
|
|
// sign that we are processing a WAL that is produced by an incompatible
|
|
// version of the code.
|
|
return status;
|
|
}
|
|
if (immutable_db_options_.wal_recovery_mode ==
|
|
WALRecoveryMode::kSkipAnyCorruptedRecords) {
|
|
// We should ignore all errors unconditionally
|
|
status = Status::OK();
|
|
} else if (immutable_db_options_.wal_recovery_mode ==
|
|
WALRecoveryMode::kPointInTimeRecovery) {
|
|
if (status.IsIOError()) {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"IOError during point-in-time reading log #%" PRIu64
|
|
" seq #%" PRIu64
|
|
". %s. This likely mean loss of synced WAL, "
|
|
"thus recovery fails.",
|
|
wal_number, *next_sequence,
|
|
status.ToString().c_str());
|
|
return status;
|
|
}
|
|
// We should ignore the error but not continue replaying
|
|
status = Status::OK();
|
|
stop_replay_for_corruption = true;
|
|
corrupted_wal_number = wal_number;
|
|
if (corrupted_wal_found != nullptr) {
|
|
*corrupted_wal_found = true;
|
|
}
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Point in time recovered to log #%" PRIu64
|
|
" seq #%" PRIu64,
|
|
wal_number, *next_sequence);
|
|
} else {
|
|
assert(immutable_db_options_.wal_recovery_mode ==
|
|
WALRecoveryMode::kTolerateCorruptedTailRecords ||
|
|
immutable_db_options_.wal_recovery_mode ==
|
|
WALRecoveryMode::kAbsoluteConsistency);
|
|
return status;
|
|
}
|
|
}
|
|
|
|
flush_scheduler_.Clear();
|
|
trim_history_scheduler_.Clear();
|
|
auto last_sequence = *next_sequence - 1;
|
|
if ((*next_sequence != kMaxSequenceNumber) &&
|
|
(versions_->LastSequence() <= last_sequence)) {
|
|
versions_->SetLastAllocatedSequence(last_sequence);
|
|
versions_->SetLastPublishedSequence(last_sequence);
|
|
versions_->SetLastSequence(last_sequence);
|
|
}
|
|
}
|
|
// Compare the corrupted log number to all columnfamily's current log number.
|
|
// Abort Open() if any column family's log number is greater than
|
|
// the corrupted log number, which means CF contains data beyond the point of
|
|
// corruption. This could during PIT recovery when the WAL is corrupted and
|
|
// some (but not all) CFs are flushed
|
|
// Exclude the PIT case where no log is dropped after the corruption point.
|
|
// This is to cover the case for empty wals after corrupted log, in which we
|
|
// don't reset stop_replay_for_corruption.
|
|
if (stop_replay_for_corruption == true &&
|
|
(immutable_db_options_.wal_recovery_mode ==
|
|
WALRecoveryMode::kPointInTimeRecovery ||
|
|
immutable_db_options_.wal_recovery_mode ==
|
|
WALRecoveryMode::kTolerateCorruptedTailRecords)) {
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
// One special case cause cfd->GetLogNumber() > corrupted_wal_number but
|
|
// the CF is still consistent: If a new column family is created during
|
|
// the flush and the WAL sync fails at the same time, the new CF points to
|
|
// the new WAL but the old WAL is curropted. Since the new CF is empty, it
|
|
// is still consistent. We add the check of CF sst file size to avoid the
|
|
// false positive alert.
|
|
|
|
// Note that, the check of (cfd->GetLiveSstFilesSize() > 0) may leads to
|
|
// the ignorance of a very rare inconsistency case caused in data
|
|
// canclation. One CF is empty due to KV deletion. But those operations
|
|
// are in the WAL. If the WAL is corrupted, the status of this CF might
|
|
// not be consistent with others. However, the consistency check will be
|
|
// bypassed due to empty CF.
|
|
// TODO: a better and complete implementation is needed to ensure strict
|
|
// consistency check in WAL recovery including hanlding the tailing
|
|
// issues.
|
|
if (cfd->GetLogNumber() > corrupted_wal_number &&
|
|
cfd->GetLiveSstFilesSize() > 0) {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"Column family inconsistency: SST file contains data"
|
|
" beyond the point of corruption.");
|
|
return Status::Corruption("SST file is ahead of WALs in CF " +
|
|
cfd->GetName());
|
|
}
|
|
}
|
|
}
|
|
|
|
// True if there's any data in the WALs; if not, we can skip re-processing
|
|
// them later
|
|
bool data_seen = false;
|
|
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
|
|
const WalNumber max_wal_number = wal_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_wal_number) {
|
|
// Column family cfd has already flushed the data
|
|
// from all wals. Memtable has to be empty because
|
|
// we filter the updates based on wal_number
|
|
// (in WriteBatch::InsertInto)
|
|
assert(cfd->mem()->GetFirstSequenceNumber() == 0);
|
|
assert(edit->NumEntries() == 0);
|
|
continue;
|
|
}
|
|
|
|
TEST_SYNC_POINT_CALLBACK(
|
|
"DBImpl::RecoverLogFiles:BeforeFlushFinalMemtable", /*arg=*/nullptr);
|
|
|
|
// flush the final memtable (if non-empty)
|
|
if (cfd->mem()->GetFirstSequenceNumber() != 0) {
|
|
// If flush happened in the middle of recovery (e.g. due to memtable
|
|
// being full), we flush at the end. Otherwise we'll need to record
|
|
// where we were on last flush, which make the logic complicated.
|
|
if (flushed || !immutable_db_options_.avoid_flush_during_recovery) {
|
|
status = WriteLevel0TableForRecovery(job_id, cfd, cfd->mem(), edit);
|
|
if (!status.ok()) {
|
|
// Recovery failed
|
|
break;
|
|
}
|
|
flushed = true;
|
|
|
|
cfd->CreateNewMemtable(*cfd->GetLatestMutableCFOptions(),
|
|
versions_->LastSequence());
|
|
}
|
|
data_seen = true;
|
|
}
|
|
|
|
// Update the log number info in the version edit corresponding to this
|
|
// column family. Note that the version edits will be written to MANIFEST
|
|
// together later.
|
|
// writing wal_number in the manifest means that any log file
|
|
// with number strongly less than (wal_number + 1) is already
|
|
// recovered and should be ignored on next reincarnation.
|
|
// Since we already recovered max_wal_number, we want all wals
|
|
// with numbers `<= max_wal_number` (includes this one) to be ignored
|
|
if (flushed || cfd->mem()->GetFirstSequenceNumber() == 0) {
|
|
edit->SetLogNumber(max_wal_number + 1);
|
|
}
|
|
}
|
|
if (status.ok()) {
|
|
// 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_->MarkFileNumberUsed(max_wal_number + 1);
|
|
assert(recovery_ctx != nullptr);
|
|
|
|
for (auto* cfd : *versions_->GetColumnFamilySet()) {
|
|
auto iter = version_edits.find(cfd->GetID());
|
|
assert(iter != version_edits.end());
|
|
recovery_ctx->UpdateVersionEdits(cfd, iter->second);
|
|
}
|
|
|
|
if (flushed) {
|
|
VersionEdit wal_deletion;
|
|
if (immutable_db_options_.track_and_verify_wals_in_manifest) {
|
|
wal_deletion.DeleteWalsBefore(max_wal_number + 1);
|
|
}
|
|
if (!allow_2pc()) {
|
|
// In non-2pc mode, flushing the memtables of the column families
|
|
// means we can advance min_log_number_to_keep.
|
|
wal_deletion.SetMinLogNumberToKeep(max_wal_number + 1);
|
|
}
|
|
assert(versions_->GetColumnFamilySet() != nullptr);
|
|
recovery_ctx->UpdateVersionEdits(
|
|
versions_->GetColumnFamilySet()->GetDefault(), wal_deletion);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (status.ok()) {
|
|
if (data_seen && !flushed) {
|
|
status = RestoreAliveLogFiles(wal_numbers);
|
|
} else if (!wal_numbers.empty()) { // If there's no data in the WAL, or we
|
|
// flushed all the data, still
|
|
// truncate the log file. If the process goes into a crash loop before
|
|
// the file is deleted, the preallocated space will never get freed.
|
|
const bool truncate = !read_only;
|
|
GetLogSizeAndMaybeTruncate(wal_numbers.back(), truncate, nullptr)
|
|
.PermitUncheckedError();
|
|
}
|
|
}
|
|
|
|
event_logger_.Log() << "job" << job_id << "event"
|
|
<< "recovery_finished";
|
|
|
|
return status;
|
|
}
|
|
|
|
Status DBImpl::GetLogSizeAndMaybeTruncate(uint64_t wal_number, bool truncate,
|
|
LogFileNumberSize* log_ptr) {
|
|
LogFileNumberSize log(wal_number);
|
|
std::string fname =
|
|
LogFileName(immutable_db_options_.GetWalDir(), wal_number);
|
|
Status s;
|
|
// This gets the appear size of the wals, not including preallocated space.
|
|
s = env_->GetFileSize(fname, &log.size);
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::GetLogSizeAndMaybeTruncate:0", /*arg=*/&s);
|
|
if (s.ok() && truncate) {
|
|
std::unique_ptr<FSWritableFile> last_log;
|
|
Status truncate_status = fs_->ReopenWritableFile(
|
|
fname,
|
|
fs_->OptimizeForLogWrite(
|
|
file_options_,
|
|
BuildDBOptions(immutable_db_options_, mutable_db_options_)),
|
|
&last_log, nullptr);
|
|
if (truncate_status.ok()) {
|
|
truncate_status = last_log->Truncate(log.size, IOOptions(), nullptr);
|
|
}
|
|
if (truncate_status.ok()) {
|
|
truncate_status = last_log->Close(IOOptions(), nullptr);
|
|
}
|
|
// Not a critical error if fail to truncate.
|
|
if (!truncate_status.ok() && !truncate_status.IsNotSupported()) {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log,
|
|
"Failed to truncate log #%" PRIu64 ": %s", wal_number,
|
|
truncate_status.ToString().c_str());
|
|
}
|
|
}
|
|
if (log_ptr) {
|
|
*log_ptr = log;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::RestoreAliveLogFiles(const std::vector<uint64_t>& wal_numbers) {
|
|
if (wal_numbers.empty()) {
|
|
return Status::OK();
|
|
}
|
|
Status s;
|
|
mutex_.AssertHeld();
|
|
assert(immutable_db_options_.avoid_flush_during_recovery);
|
|
// Mark these as alive so they'll be considered for deletion later by
|
|
// FindObsoleteFiles()
|
|
total_log_size_ = 0;
|
|
log_empty_ = false;
|
|
uint64_t min_wal_with_unflushed_data =
|
|
versions_->MinLogNumberWithUnflushedData();
|
|
for (auto wal_number : wal_numbers) {
|
|
if (!allow_2pc() && wal_number < min_wal_with_unflushed_data) {
|
|
// In non-2pc mode, the WAL files not backing unflushed data are not
|
|
// alive, thus should not be added to the alive_log_files_.
|
|
continue;
|
|
}
|
|
// We preallocate space for wals, but then after a crash and restart, those
|
|
// preallocated space are not needed anymore. It is likely only the last
|
|
// log has such preallocated space, so we only truncate for the last log.
|
|
LogFileNumberSize log;
|
|
s = GetLogSizeAndMaybeTruncate(
|
|
wal_number, /*truncate=*/(wal_number == wal_numbers.back()), &log);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
total_log_size_ += log.size;
|
|
alive_log_files_.push_back(log);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::WriteLevel0TableForRecovery(int job_id, ColumnFamilyData* cfd,
|
|
MemTable* mem, VersionEdit* edit) {
|
|
mutex_.AssertHeld();
|
|
assert(cfd);
|
|
assert(cfd->imm());
|
|
// The immutable memtable list must be empty.
|
|
assert(std::numeric_limits<uint64_t>::max() ==
|
|
cfd->imm()->GetEarliestMemTableID());
|
|
|
|
const uint64_t start_micros = immutable_db_options_.clock->NowMicros();
|
|
|
|
FileMetaData meta;
|
|
std::vector<BlobFileAddition> blob_file_additions;
|
|
|
|
std::unique_ptr<std::list<uint64_t>::iterator> pending_outputs_inserted_elem(
|
|
new std::list<uint64_t>::iterator(
|
|
CaptureCurrentFileNumberInPendingOutputs()));
|
|
meta.fd = FileDescriptor(versions_->NewFileNumber(), 0, 0);
|
|
ReadOptions ro;
|
|
ro.total_order_seek = true;
|
|
Arena arena;
|
|
Status s;
|
|
TableProperties table_properties;
|
|
{
|
|
ScopedArenaIterator iter(mem->NewIterator(ro, &arena));
|
|
ROCKS_LOG_DEBUG(immutable_db_options_.info_log,
|
|
"[%s] [WriteLevel0TableForRecovery]"
|
|
" Level-0 table #%" PRIu64 ": started",
|
|
cfd->GetName().c_str(), meta.fd.GetNumber());
|
|
|
|
// Get the latest mutable cf options while the mutex is still locked
|
|
const MutableCFOptions mutable_cf_options =
|
|
*cfd->GetLatestMutableCFOptions();
|
|
bool paranoid_file_checks =
|
|
cfd->GetLatestMutableCFOptions()->paranoid_file_checks;
|
|
|
|
int64_t _current_time = 0;
|
|
immutable_db_options_.clock->GetCurrentTime(&_current_time)
|
|
.PermitUncheckedError(); // ignore error
|
|
const uint64_t current_time = static_cast<uint64_t>(_current_time);
|
|
meta.oldest_ancester_time = current_time;
|
|
|
|
{
|
|
auto write_hint = cfd->CalculateSSTWriteHint(0);
|
|
mutex_.Unlock();
|
|
|
|
SequenceNumber earliest_write_conflict_snapshot;
|
|
std::vector<SequenceNumber> snapshot_seqs =
|
|
snapshots_.GetAll(&earliest_write_conflict_snapshot);
|
|
auto snapshot_checker = snapshot_checker_.get();
|
|
if (use_custom_gc_ && snapshot_checker == nullptr) {
|
|
snapshot_checker = DisableGCSnapshotChecker::Instance();
|
|
}
|
|
std::vector<std::unique_ptr<FragmentedRangeTombstoneIterator>>
|
|
range_del_iters;
|
|
auto range_del_iter =
|
|
// This is called during recovery, where a live memtable is flushed
|
|
// directly. In this case, no fragmented tombstone list is cached in
|
|
// this memtable yet.
|
|
mem->NewRangeTombstoneIterator(ro, kMaxSequenceNumber,
|
|
false /* immutable_memtable */);
|
|
if (range_del_iter != nullptr) {
|
|
range_del_iters.emplace_back(range_del_iter);
|
|
}
|
|
|
|
IOStatus io_s;
|
|
TableBuilderOptions tboptions(
|
|
*cfd->ioptions(), mutable_cf_options, cfd->internal_comparator(),
|
|
cfd->int_tbl_prop_collector_factories(),
|
|
GetCompressionFlush(*cfd->ioptions(), mutable_cf_options),
|
|
mutable_cf_options.compression_opts, cfd->GetID(), cfd->GetName(),
|
|
0 /* level */, false /* is_bottommost */,
|
|
TableFileCreationReason::kRecovery, 0 /* oldest_key_time */,
|
|
0 /* file_creation_time */, db_id_, db_session_id_,
|
|
0 /* target_file_size */, meta.fd.GetNumber());
|
|
SeqnoToTimeMapping empty_seqno_time_mapping;
|
|
s = BuildTable(
|
|
dbname_, versions_.get(), immutable_db_options_, tboptions,
|
|
file_options_for_compaction_, cfd->table_cache(), iter.get(),
|
|
std::move(range_del_iters), &meta, &blob_file_additions,
|
|
snapshot_seqs, earliest_write_conflict_snapshot, kMaxSequenceNumber,
|
|
snapshot_checker, paranoid_file_checks, cfd->internal_stats(), &io_s,
|
|
io_tracer_, BlobFileCreationReason::kRecovery,
|
|
empty_seqno_time_mapping, &event_logger_, job_id, Env::IO_HIGH,
|
|
nullptr /* table_properties */, write_hint,
|
|
nullptr /*full_history_ts_low*/, &blob_callback_);
|
|
LogFlush(immutable_db_options_.info_log);
|
|
ROCKS_LOG_DEBUG(immutable_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());
|
|
mutex_.Lock();
|
|
|
|
// TODO(AR) is this ok?
|
|
if (!io_s.ok() && s.ok()) {
|
|
s = io_s;
|
|
}
|
|
}
|
|
}
|
|
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.
|
|
const bool has_output = meta.fd.GetFileSize() > 0;
|
|
|
|
constexpr int level = 0;
|
|
|
|
if (s.ok() && has_output) {
|
|
edit->AddFile(level, meta.fd.GetNumber(), meta.fd.GetPathId(),
|
|
meta.fd.GetFileSize(), meta.smallest, meta.largest,
|
|
meta.fd.smallest_seqno, meta.fd.largest_seqno,
|
|
meta.marked_for_compaction, meta.temperature,
|
|
meta.oldest_blob_file_number, meta.oldest_ancester_time,
|
|
meta.file_creation_time, meta.file_checksum,
|
|
meta.file_checksum_func_name, meta.unique_id);
|
|
|
|
for (const auto& blob : blob_file_additions) {
|
|
edit->AddBlobFile(blob);
|
|
}
|
|
}
|
|
|
|
InternalStats::CompactionStats stats(CompactionReason::kFlush, 1);
|
|
stats.micros = immutable_db_options_.clock->NowMicros() - start_micros;
|
|
|
|
if (has_output) {
|
|
stats.bytes_written = meta.fd.GetFileSize();
|
|
stats.num_output_files = 1;
|
|
}
|
|
|
|
const auto& blobs = edit->GetBlobFileAdditions();
|
|
for (const auto& blob : blobs) {
|
|
stats.bytes_written_blob += blob.GetTotalBlobBytes();
|
|
}
|
|
|
|
stats.num_output_files_blob = static_cast<int>(blobs.size());
|
|
|
|
cfd->internal_stats()->AddCompactionStats(level, Env::Priority::USER, stats);
|
|
cfd->internal_stats()->AddCFStats(
|
|
InternalStats::BYTES_FLUSHED,
|
|
stats.bytes_written + stats.bytes_written_blob);
|
|
RecordTick(stats_, COMPACT_WRITE_BYTES, meta.fd.GetFileSize());
|
|
return s;
|
|
}
|
|
|
|
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));
|
|
if (db_options.persist_stats_to_disk) {
|
|
column_families.push_back(
|
|
ColumnFamilyDescriptor(kPersistentStatsColumnFamilyName, cf_options));
|
|
}
|
|
std::vector<ColumnFamilyHandle*> handles;
|
|
Status s = DB::Open(db_options, dbname, column_families, &handles, dbptr);
|
|
if (s.ok()) {
|
|
if (db_options.persist_stats_to_disk) {
|
|
assert(handles.size() == 2);
|
|
} else {
|
|
assert(handles.size() == 1);
|
|
}
|
|
// i can delete the handle since DBImpl is always holding a reference to
|
|
// default column family
|
|
if (db_options.persist_stats_to_disk && handles[1] != nullptr) {
|
|
delete handles[1];
|
|
}
|
|
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) {
|
|
const bool kSeqPerBatch = true;
|
|
const bool kBatchPerTxn = true;
|
|
return DBImpl::Open(db_options, dbname, column_families, handles, dbptr,
|
|
!kSeqPerBatch, kBatchPerTxn);
|
|
}
|
|
|
|
// TODO: Implement the trimming in flush code path.
|
|
// TODO: Perform trimming before inserting into memtable during recovery.
|
|
// TODO: Pick files with max_timestamp > trim_ts by each file's timestamp meta
|
|
// info, and handle only these files to reduce io.
|
|
Status DB::OpenAndTrimHistory(
|
|
const DBOptions& db_options, const std::string& dbname,
|
|
const std::vector<ColumnFamilyDescriptor>& column_families,
|
|
std::vector<ColumnFamilyHandle*>* handles, DB** dbptr,
|
|
std::string trim_ts) {
|
|
assert(dbptr != nullptr);
|
|
assert(handles != nullptr);
|
|
auto validate_options = [&db_options] {
|
|
if (db_options.avoid_flush_during_recovery) {
|
|
return Status::InvalidArgument(
|
|
"avoid_flush_during_recovery incompatible with "
|
|
"OpenAndTrimHistory");
|
|
}
|
|
return Status::OK();
|
|
};
|
|
auto s = validate_options();
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
DB* db = nullptr;
|
|
s = DB::Open(db_options, dbname, column_families, handles, &db);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
assert(db);
|
|
CompactRangeOptions options;
|
|
options.bottommost_level_compaction =
|
|
BottommostLevelCompaction::kForceOptimized;
|
|
auto db_impl = static_cast_with_check<DBImpl>(db);
|
|
for (auto handle : *handles) {
|
|
assert(handle != nullptr);
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(handle);
|
|
auto cfd = cfh->cfd();
|
|
assert(cfd != nullptr);
|
|
// Only compact column families with timestamp enabled
|
|
if (cfd->user_comparator() != nullptr &&
|
|
cfd->user_comparator()->timestamp_size() > 0) {
|
|
s = db_impl->CompactRangeInternal(options, handle, nullptr, nullptr,
|
|
trim_ts);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
auto clean_op = [&handles, &db] {
|
|
for (auto handle : *handles) {
|
|
auto temp_s = db->DestroyColumnFamilyHandle(handle);
|
|
assert(temp_s.ok());
|
|
}
|
|
handles->clear();
|
|
delete db;
|
|
};
|
|
if (!s.ok()) {
|
|
clean_op();
|
|
return s;
|
|
}
|
|
|
|
*dbptr = db;
|
|
return s;
|
|
}
|
|
|
|
IOStatus DBImpl::CreateWAL(uint64_t log_file_num, uint64_t recycle_log_number,
|
|
size_t preallocate_block_size,
|
|
log::Writer** new_log) {
|
|
IOStatus io_s;
|
|
std::unique_ptr<FSWritableFile> lfile;
|
|
|
|
DBOptions db_options =
|
|
BuildDBOptions(immutable_db_options_, mutable_db_options_);
|
|
FileOptions opt_file_options =
|
|
fs_->OptimizeForLogWrite(file_options_, db_options);
|
|
std::string wal_dir = immutable_db_options_.GetWalDir();
|
|
std::string log_fname = LogFileName(wal_dir, log_file_num);
|
|
|
|
if (recycle_log_number) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"reusing log %" PRIu64 " from recycle list\n",
|
|
recycle_log_number);
|
|
std::string old_log_fname = LogFileName(wal_dir, recycle_log_number);
|
|
TEST_SYNC_POINT("DBImpl::CreateWAL:BeforeReuseWritableFile1");
|
|
TEST_SYNC_POINT("DBImpl::CreateWAL:BeforeReuseWritableFile2");
|
|
io_s = fs_->ReuseWritableFile(log_fname, old_log_fname, opt_file_options,
|
|
&lfile, /*dbg=*/nullptr);
|
|
} else {
|
|
io_s = NewWritableFile(fs_.get(), log_fname, &lfile, opt_file_options);
|
|
}
|
|
|
|
if (io_s.ok()) {
|
|
lfile->SetWriteLifeTimeHint(CalculateWALWriteHint());
|
|
lfile->SetPreallocationBlockSize(preallocate_block_size);
|
|
|
|
const auto& listeners = immutable_db_options_.listeners;
|
|
FileTypeSet tmp_set = immutable_db_options_.checksum_handoff_file_types;
|
|
std::unique_ptr<WritableFileWriter> file_writer(new WritableFileWriter(
|
|
std::move(lfile), log_fname, opt_file_options,
|
|
immutable_db_options_.clock, io_tracer_, nullptr /* stats */, listeners,
|
|
nullptr, tmp_set.Contains(FileType::kWalFile),
|
|
tmp_set.Contains(FileType::kWalFile)));
|
|
*new_log = new log::Writer(std::move(file_writer), log_file_num,
|
|
immutable_db_options_.recycle_log_file_num > 0,
|
|
immutable_db_options_.manual_wal_flush,
|
|
immutable_db_options_.wal_compression);
|
|
io_s = (*new_log)->AddCompressionTypeRecord();
|
|
}
|
|
return io_s;
|
|
}
|
|
|
|
Status DBImpl::Open(const DBOptions& db_options, const std::string& dbname,
|
|
const std::vector<ColumnFamilyDescriptor>& column_families,
|
|
std::vector<ColumnFamilyHandle*>* handles, DB** dbptr,
|
|
const bool seq_per_batch, const bool batch_per_txn) {
|
|
Status s = ValidateOptionsByTable(db_options, column_families);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
s = ValidateOptions(db_options, column_families);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
*dbptr = nullptr;
|
|
assert(handles);
|
|
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, seq_per_batch, batch_per_txn);
|
|
if (!impl->immutable_db_options_.info_log) {
|
|
s = impl->init_logger_creation_s_;
|
|
delete impl;
|
|
return s;
|
|
} else {
|
|
assert(impl->init_logger_creation_s_.ok());
|
|
}
|
|
s = impl->env_->CreateDirIfMissing(impl->immutable_db_options_.GetWalDir());
|
|
if (s.ok()) {
|
|
std::vector<std::string> paths;
|
|
for (auto& db_path : impl->immutable_db_options_.db_paths) {
|
|
paths.emplace_back(db_path.path);
|
|
}
|
|
for (auto& cf : column_families) {
|
|
for (auto& cf_path : cf.options.cf_paths) {
|
|
paths.emplace_back(cf_path.path);
|
|
}
|
|
}
|
|
for (auto& path : paths) {
|
|
s = impl->env_->CreateDirIfMissing(path);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// For recovery from NoSpace() error, we can only handle
|
|
// the case where the database is stored in a single path
|
|
if (paths.size() <= 1) {
|
|
impl->error_handler_.EnableAutoRecovery();
|
|
}
|
|
}
|
|
if (s.ok()) {
|
|
s = impl->CreateArchivalDirectory();
|
|
}
|
|
if (!s.ok()) {
|
|
delete impl;
|
|
return s;
|
|
}
|
|
|
|
impl->wal_in_db_path_ = impl->immutable_db_options_.IsWalDirSameAsDBPath();
|
|
RecoveryContext recovery_ctx;
|
|
impl->mutex_.Lock();
|
|
|
|
// Handles create_if_missing, error_if_exists
|
|
uint64_t recovered_seq(kMaxSequenceNumber);
|
|
s = impl->Recover(column_families, false, false, false, &recovered_seq,
|
|
&recovery_ctx);
|
|
if (s.ok()) {
|
|
uint64_t new_log_number = impl->versions_->NewFileNumber();
|
|
log::Writer* new_log = nullptr;
|
|
const size_t preallocate_block_size =
|
|
impl->GetWalPreallocateBlockSize(max_write_buffer_size);
|
|
s = impl->CreateWAL(new_log_number, 0 /*recycle_log_number*/,
|
|
preallocate_block_size, &new_log);
|
|
if (s.ok()) {
|
|
InstrumentedMutexLock wl(&impl->log_write_mutex_);
|
|
impl->logfile_number_ = new_log_number;
|
|
assert(new_log != nullptr);
|
|
assert(impl->logs_.empty());
|
|
impl->logs_.emplace_back(new_log_number, new_log);
|
|
}
|
|
|
|
if (s.ok()) {
|
|
impl->alive_log_files_.push_back(
|
|
DBImpl::LogFileNumberSize(impl->logfile_number_));
|
|
// In WritePrepared there could be gap in sequence numbers. This breaks
|
|
// the trick we use in kPointInTimeRecovery which assumes the first seq in
|
|
// the log right after the corrupted log is one larger than the last seq
|
|
// we read from the wals. To let this trick keep working, we add a dummy
|
|
// entry with the expected sequence to the first log right after recovery.
|
|
// In non-WritePrepared case also the new log after recovery could be
|
|
// empty, and thus missing the consecutive seq hint to distinguish
|
|
// middle-log corruption to corrupted-log-remained-after-recovery. This
|
|
// case also will be addressed by a dummy write.
|
|
if (recovered_seq != kMaxSequenceNumber) {
|
|
WriteBatch empty_batch;
|
|
WriteBatchInternal::SetSequence(&empty_batch, recovered_seq);
|
|
WriteOptions write_options;
|
|
uint64_t log_used, log_size;
|
|
log::Writer* log_writer = impl->logs_.back().writer;
|
|
LogFileNumberSize& log_file_number_size = impl->alive_log_files_.back();
|
|
|
|
assert(log_writer->get_log_number() == log_file_number_size.number);
|
|
impl->mutex_.AssertHeld();
|
|
s = impl->WriteToWAL(empty_batch, log_writer, &log_used, &log_size,
|
|
Env::IO_TOTAL, log_file_number_size);
|
|
if (s.ok()) {
|
|
// Need to fsync, otherwise it might get lost after a power reset.
|
|
s = impl->FlushWAL(false);
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::Open::BeforeSyncWAL", /*arg=*/&s);
|
|
if (s.ok()) {
|
|
s = log_writer->file()->Sync(impl->immutable_db_options_.use_fsync);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (s.ok()) {
|
|
s = impl->LogAndApplyForRecovery(recovery_ctx);
|
|
}
|
|
|
|
if (s.ok() && impl->immutable_db_options_.persist_stats_to_disk) {
|
|
impl->mutex_.AssertHeld();
|
|
s = impl->InitPersistStatsColumnFamily();
|
|
}
|
|
|
|
if (s.ok()) {
|
|
// 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 = nullptr;
|
|
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()) {
|
|
SuperVersionContext sv_context(/* create_superversion */ true);
|
|
for (auto cfd : *impl->versions_->GetColumnFamilySet()) {
|
|
impl->InstallSuperVersionAndScheduleWork(
|
|
cfd, &sv_context, *cfd->GetLatestMutableCFOptions());
|
|
}
|
|
sv_context.Clean();
|
|
}
|
|
|
|
if (s.ok() && impl->immutable_db_options_.persist_stats_to_disk) {
|
|
// try to read format version
|
|
s = impl->PersistentStatsProcessFormatVersion();
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::Open:Opened");
|
|
Status persist_options_status;
|
|
if (s.ok()) {
|
|
// Persist RocksDB Options before scheduling the compaction.
|
|
// The WriteOptionsFile() will release and lock the mutex internally.
|
|
persist_options_status = impl->WriteOptionsFile(
|
|
false /*need_mutex_lock*/, false /*need_enter_write_thread*/);
|
|
|
|
*dbptr = impl;
|
|
impl->opened_successfully_ = true;
|
|
impl->DeleteObsoleteFiles();
|
|
TEST_SYNC_POINT("DBImpl::Open:AfterDeleteFiles");
|
|
impl->MaybeScheduleFlushOrCompaction();
|
|
} else {
|
|
persist_options_status.PermitUncheckedError();
|
|
}
|
|
impl->mutex_.Unlock();
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
auto sfm = static_cast<SstFileManagerImpl*>(
|
|
impl->immutable_db_options_.sst_file_manager.get());
|
|
if (s.ok() && sfm) {
|
|
// Set Statistics ptr for SstFileManager to dump the stats of
|
|
// DeleteScheduler.
|
|
sfm->SetStatisticsPtr(impl->immutable_db_options_.statistics);
|
|
ROCKS_LOG_INFO(impl->immutable_db_options_.info_log,
|
|
"SstFileManager instance %p", sfm);
|
|
|
|
// Notify SstFileManager about all sst files that already exist in
|
|
// db_paths[0] and cf_paths[0] when the DB is opened.
|
|
|
|
// SstFileManagerImpl needs to know sizes of the files. For files whose size
|
|
// we already know (sst files that appear in manifest - typically that's the
|
|
// vast majority of all files), we'll pass the size to SstFileManager.
|
|
// For all other files SstFileManager will query the size from filesystem.
|
|
|
|
std::vector<ColumnFamilyMetaData> metadata;
|
|
impl->GetAllColumnFamilyMetaData(&metadata);
|
|
|
|
std::unordered_map<std::string, uint64_t> known_file_sizes;
|
|
for (const auto& md : metadata) {
|
|
for (const auto& lmd : md.levels) {
|
|
for (const auto& fmd : lmd.files) {
|
|
known_file_sizes[fmd.relative_filename] = fmd.size;
|
|
}
|
|
}
|
|
for (const auto& bmd : md.blob_files) {
|
|
std::string name = bmd.blob_file_name;
|
|
// The BlobMetaData.blob_file_name may start with "/".
|
|
if (!name.empty() && name[0] == '/') {
|
|
name = name.substr(1);
|
|
}
|
|
known_file_sizes[name] = bmd.blob_file_size;
|
|
}
|
|
}
|
|
|
|
std::vector<std::string> paths;
|
|
paths.emplace_back(impl->immutable_db_options_.db_paths[0].path);
|
|
for (auto& cf : column_families) {
|
|
if (!cf.options.cf_paths.empty()) {
|
|
paths.emplace_back(cf.options.cf_paths[0].path);
|
|
}
|
|
}
|
|
// Remove duplicate paths.
|
|
std::sort(paths.begin(), paths.end());
|
|
paths.erase(std::unique(paths.begin(), paths.end()), paths.end());
|
|
for (auto& path : paths) {
|
|
std::vector<std::string> existing_files;
|
|
impl->immutable_db_options_.env->GetChildren(path, &existing_files)
|
|
.PermitUncheckedError(); //**TODO: What do to on error?
|
|
for (auto& file_name : existing_files) {
|
|
uint64_t file_number;
|
|
FileType file_type;
|
|
std::string file_path = path + "/" + file_name;
|
|
if (ParseFileName(file_name, &file_number, &file_type) &&
|
|
(file_type == kTableFile || file_type == kBlobFile)) {
|
|
// TODO: Check for errors from OnAddFile?
|
|
if (known_file_sizes.count(file_name)) {
|
|
// We're assuming that each sst file name exists in at most one of
|
|
// the paths.
|
|
sfm->OnAddFile(file_path, known_file_sizes.at(file_name))
|
|
.PermitUncheckedError();
|
|
} else {
|
|
sfm->OnAddFile(file_path).PermitUncheckedError();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Reserve some disk buffer space. This is a heuristic - when we run out
|
|
// of disk space, this ensures that there is atleast write_buffer_size
|
|
// amount of free space before we resume DB writes. In low disk space
|
|
// conditions, we want to avoid a lot of small L0 files due to frequent
|
|
// WAL write failures and resultant forced flushes
|
|
sfm->ReserveDiskBuffer(max_write_buffer_size,
|
|
impl->immutable_db_options_.db_paths[0].path);
|
|
}
|
|
|
|
#endif // !ROCKSDB_LITE
|
|
|
|
if (s.ok()) {
|
|
ROCKS_LOG_HEADER(impl->immutable_db_options_.info_log, "DB pointer %p",
|
|
impl);
|
|
LogFlush(impl->immutable_db_options_.info_log);
|
|
assert(impl->TEST_WALBufferIsEmpty());
|
|
// If the assert above fails then we need to FlushWAL before returning
|
|
// control back to the user.
|
|
if (!persist_options_status.ok()) {
|
|
s = Status::IOError(
|
|
"DB::Open() failed --- Unable to persist Options file",
|
|
persist_options_status.ToString());
|
|
}
|
|
}
|
|
if (!s.ok()) {
|
|
ROCKS_LOG_WARN(impl->immutable_db_options_.info_log,
|
|
"DB::Open() failed: %s", s.ToString().c_str());
|
|
}
|
|
if (s.ok()) {
|
|
s = impl->StartPeriodicTaskScheduler();
|
|
}
|
|
|
|
if (s.ok()) {
|
|
s = impl->RegisterRecordSeqnoTimeWorker();
|
|
}
|
|
if (!s.ok()) {
|
|
for (auto* h : *handles) {
|
|
delete h;
|
|
}
|
|
handles->clear();
|
|
delete impl;
|
|
*dbptr = nullptr;
|
|
}
|
|
return s;
|
|
}
|
|
} // namespace ROCKSDB_NAMESPACE
|