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rocksdb/db/repair.cc
Peter Dillinger a1a102ffce Steps toward deprecating implicit prefix seek, related fixes (#13026) 
Summary:
With some new use cases onboarding to prefix extractors/seek/filters, one of the risks is existing iterator code, e.g. for maintenance tasks, being unintentionally subject to prefix seek semantics. This is a longstanding known design flaw with prefix seek, and `prefix_same_as_start` and `auto_prefix_mode` were steps in the direction of making that obsolete. However, we can't just immediately set `total_order_seek` to true by default, because that would impact so much code instantly.

Here we add a new DB option, `prefix_seek_opt_in_only` that basically allows users to transition to the future behavior when they are ready. When set to true, all iterators will be treated as if `total_order_seek=true` and then the only ways to get prefix seek semantics are with `prefix_same_as_start` or `auto_prefix_mode`.

Related fixes / changes:
* Make sure that `prefix_same_as_start` and `auto_prefix_mode` are compatible with (or override) `total_order_seek` (depending on your interpretation).
* Fix a bug in which a new iterator after dynamically changing the prefix extractor might mix different prefix semantics between memtable and SSTs. Both should use the latest extractor semantics, which means iterators ignoring memtable prefix filters with an old extractor. And that means passing the latest prefix extractor to new memtable iterators that might use prefix seek. (Without the fix, the test added for this fails in many ways.)

Suggested follow-up:
* Investigate a FIXME where a MergeIteratorBuilder is created in db_impl.cc. No unit test detects a change in value that should impact correctness.
* Make memtable prefix bloom compatible with `auto_prefix_mode`, which might require involving the memtablereps because we don't know at iterator creation time (only seek time) whether an auto_prefix_mode seek will be a prefix seek.
* Add `prefix_same_as_start` testing to db_stress

Pull Request resolved: https://github.com/facebook/rocksdb/pull/13026

Test Plan:
tests updated, added. Add combination of `total_order_seek=true` and `auto_prefix_mode=true` to stress test. Ran `make blackbox_crash_test` for a long while.

Manually ran tests with `prefix_seek_opt_in_only=true` as default, looking for unexpected issues. I inspected most of the results and migrated many tests to be ready for such a change (but not all).

Reviewed By: ltamasi

Differential Revision: D63147378

Pulled By: pdillinger

fbshipit-source-id: 1f4477b730683d43b4be7e933338583702d3c25e
2024-09-20 15:54:19 -07:00

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
//
// Repairer does best effort recovery to recover as much data as possible after
// a disaster without compromising consistency. It does not guarantee bringing
// the database to a time consistent state.
//
// Repair process is broken into 4 phases:
// (a) Find files
// (b) Convert logs to tables
// (c) Extract metadata
// (d) Write Descriptor
//
// (a) Find files
//
// The repairer goes through all the files in the directory, and classifies them
// based on their file name. Any file that cannot be identified by name will be
// ignored.
//
// (b) Convert logs to table
//
// Every log file that is active is replayed. All sections of the file where the
// checksum does not match is skipped over. We intentionally give preference to
// data consistency.
//
// (c) Extract metadata
//
// We scan every table to compute
// (1) smallest/largest for the table
// (2) largest sequence number in the table
// (3) oldest blob file referred to by the table (if applicable)
//
// If we are unable to scan the file, then we ignore the table.
//
// (d) Write Descriptor
//
// We generate descriptor contents:
// - log number is set to zero
// - next-file-number is set to 1 + largest file number we found
// - last-sequence-number is set to largest sequence# found across
// all tables (see 2c)
// - compaction pointers are cleared
// - every table file is added at level 0
//
// Possible optimization 1:
// (a) Compute total size and use to pick appropriate max-level M
// (b) Sort tables by largest sequence# in the table
// (c) For each table: if it overlaps earlier table, place in level-0,
// else place in level-M.
// (d) We can provide options for time consistent recovery and unsafe recovery
// (ignore checksum failure when applicable)
// Possible optimization 2:
// Store per-table metadata (smallest, largest, largest-seq#, ...)
// in the table's meta section to speed up ScanTable.
#include "db/version_builder.h"
#include <cinttypes>
#include "db/builder.h"
#include "db/db_impl/db_impl.h"
#include "db/dbformat.h"
#include "db/log_reader.h"
#include "db/log_writer.h"
#include "db/memtable.h"
#include "db/table_cache.h"
#include "db/version_edit.h"
#include "db/write_batch_internal.h"
#include "file/filename.h"
#include "file/writable_file_writer.h"
#include "logging/logging.h"
#include "options/cf_options.h"
#include "rocksdb/comparator.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "rocksdb/options.h"
#include "rocksdb/write_buffer_manager.h"
#include "table/unique_id_impl.h"
#include "util/string_util.h"
namespace ROCKSDB_NAMESPACE {
namespace {
class Repairer {
public:
Repairer(const std::string& dbname, const DBOptions& db_options,
const std::vector<ColumnFamilyDescriptor>& column_families,
const ColumnFamilyOptions& default_cf_opts,
const ColumnFamilyOptions& unknown_cf_opts, bool create_unknown_cfs)
: dbname_(dbname),
db_session_id_(DBImpl::GenerateDbSessionId(db_options.env)),
env_(db_options.env),
file_options_(),
db_options_(SanitizeOptions(dbname_, db_options)),
immutable_db_options_(ImmutableDBOptions(db_options_)),
icmp_(default_cf_opts.comparator),
default_cf_opts_(
SanitizeOptions(immutable_db_options_, default_cf_opts)),
default_iopts_(
ImmutableOptions(immutable_db_options_, default_cf_opts_)),
unknown_cf_opts_(
SanitizeOptions(immutable_db_options_, unknown_cf_opts)),
create_unknown_cfs_(create_unknown_cfs),
raw_table_cache_(
// TableCache can be small since we expect each table to be opened
// once.
NewLRUCache(10, db_options_.table_cache_numshardbits)),
table_cache_(new TableCache(default_iopts_, &file_options_,
raw_table_cache_.get(),
/*block_cache_tracer=*/nullptr,
/*io_tracer=*/nullptr, db_session_id_)),
wb_(db_options_.db_write_buffer_size),
wc_(db_options_.delayed_write_rate),
vset_(dbname_, &immutable_db_options_, file_options_,
raw_table_cache_.get(), &wb_, &wc_,
/*block_cache_tracer=*/nullptr, /*io_tracer=*/nullptr,
/*db_id=*/"", db_session_id_, db_options.daily_offpeak_time_utc,
/*error_handler=*/nullptr, /*read_only=*/false),
next_file_number_(1),
db_lock_(nullptr),
closed_(false) {
for (const auto& cfd : column_families) {
cf_name_to_opts_[cfd.name] = cfd.options;
}
}
const ColumnFamilyOptions* GetColumnFamilyOptions(
const std::string& cf_name) {
if (cf_name_to_opts_.find(cf_name) == cf_name_to_opts_.end()) {
if (create_unknown_cfs_) {
return &unknown_cf_opts_;
}
return nullptr;
}
return &cf_name_to_opts_[cf_name];
}
// Adds a column family to the VersionSet with cf_options_ and updates
// manifest.
Status AddColumnFamily(const std::string& cf_name, uint32_t cf_id) {
// TODO: plumb Env::IOActivity, Env::IOPriority;
const ReadOptions read_options;
const WriteOptions write_options;
const auto* cf_opts = GetColumnFamilyOptions(cf_name);
if (cf_opts == nullptr) {
return Status::Corruption("Encountered unknown column family with name=" +
cf_name + ", id=" + std::to_string(cf_id));
}
Options opts(db_options_, *cf_opts);
MutableCFOptions mut_cf_opts(opts);
VersionEdit edit;
edit.SetComparatorName(opts.comparator->Name());
edit.SetPersistUserDefinedTimestamps(opts.persist_user_defined_timestamps);
edit.SetLogNumber(0);
edit.SetColumnFamily(cf_id);
ColumnFamilyData* cfd;
cfd = nullptr;
edit.AddColumnFamily(cf_name);
mutex_.Lock();
std::unique_ptr<FSDirectory> db_dir;
Status status = env_->GetFileSystem()->NewDirectory(dbname_, IOOptions(),
&db_dir, nullptr);
if (status.ok()) {
status = vset_.LogAndApply(cfd, mut_cf_opts, read_options, write_options,
&edit, &mutex_, db_dir.get(),
false /* new_descriptor_log */, cf_opts);
}
mutex_.Unlock();
return status;
}
Status Close() {
Status s = Status::OK();
if (!closed_) {
if (db_lock_ != nullptr) {
s = env_->UnlockFile(db_lock_);
db_lock_ = nullptr;
}
closed_ = true;
}
return s;
}
~Repairer() { Close().PermitUncheckedError(); }
Status Run() {
Status status = env_->LockFile(LockFileName(dbname_), &db_lock_);
if (!status.ok()) {
return status;
}
status = FindFiles();
DBImpl* db_impl = nullptr;
if (status.ok()) {
// Discard older manifests and start a fresh one
for (size_t i = 0; i < manifests_.size(); i++) {
ArchiveFile(dbname_ + "/" + manifests_[i]);
}
// Just create a DBImpl temporarily so we can reuse NewDB()
db_impl = new DBImpl(db_options_, dbname_);
status = db_impl->NewDB(/*new_filenames=*/nullptr);
}
delete db_impl;
if (status.ok()) {
// Recover using the fresh manifest created by NewDB()
status =
vset_.Recover({{kDefaultColumnFamilyName, default_cf_opts_}}, false);
}
if (status.ok()) {
// Need to scan existing SST files first so the column families are
// created before we process WAL files
ExtractMetaData();
// ExtractMetaData() uses table_fds_ to know which SST files' metadata to
// extract -- we need to clear it here since metadata for existing SST
// files has been extracted already
table_fds_.clear();
ConvertLogFilesToTables();
ExtractMetaData();
status = AddTables();
}
if (status.ok()) {
uint64_t bytes = 0;
for (size_t i = 0; i < tables_.size(); i++) {
bytes += tables_[i].meta.fd.GetFileSize();
}
ROCKS_LOG_WARN(db_options_.info_log,
"**** Repaired rocksdb %s; "
"recovered %" ROCKSDB_PRIszt " files; %" PRIu64
" bytes. "
"Some data may have been lost. "
"****",
dbname_.c_str(), tables_.size(), bytes);
}
return status;
}
private:
struct TableInfo {
FileMetaData meta;
uint32_t column_family_id;
std::string column_family_name;
};
std::string const dbname_;
std::string db_session_id_;
Env* const env_;
const FileOptions file_options_;
const DBOptions db_options_;
const ImmutableDBOptions immutable_db_options_;
const InternalKeyComparator icmp_;
const ColumnFamilyOptions default_cf_opts_;
const ImmutableOptions default_iopts_; // table_cache_ holds reference
const ColumnFamilyOptions unknown_cf_opts_;
const bool create_unknown_cfs_;
std::shared_ptr<Cache> raw_table_cache_;
std::unique_ptr<TableCache> table_cache_;
WriteBufferManager wb_;
WriteController wc_;
VersionSet vset_;
std::unordered_map<std::string, ColumnFamilyOptions> cf_name_to_opts_;
InstrumentedMutex mutex_;
std::vector<std::string> manifests_;
std::vector<FileDescriptor> table_fds_;
std::vector<uint64_t> logs_;
std::vector<TableInfo> tables_;
uint64_t next_file_number_;
// Lock over the persistent DB state. Non-nullptr iff successfully
// acquired.
FileLock* db_lock_;
bool closed_;
Status FindFiles() {
std::vector<std::string> filenames;
bool found_file = false;
std::vector<std::string> to_search_paths;
for (size_t path_id = 0; path_id < db_options_.db_paths.size(); path_id++) {
to_search_paths.push_back(db_options_.db_paths[path_id].path);
}
// search wal_dir if user uses a customize wal_dir
bool same = immutable_db_options_.IsWalDirSameAsDBPath(dbname_);
if (!same) {
to_search_paths.push_back(immutable_db_options_.wal_dir);
}
for (size_t path_id = 0; path_id < to_search_paths.size(); path_id++) {
ROCKS_LOG_INFO(db_options_.info_log, "Searching path %s\n",
to_search_paths[path_id].c_str());
Status status = env_->GetChildren(to_search_paths[path_id], &filenames);
if (!status.ok()) {
return status;
}
if (!filenames.empty()) {
found_file = true;
}
uint64_t number;
FileType type;
for (size_t i = 0; i < filenames.size(); i++) {
if (ParseFileName(filenames[i], &number, &type)) {
if (type == kDescriptorFile) {
manifests_.push_back(filenames[i]);
} else {
if (number + 1 > next_file_number_) {
next_file_number_ = number + 1;
}
if (type == kWalFile) {
logs_.push_back(number);
} else if (type == kTableFile) {
table_fds_.emplace_back(number, static_cast<uint32_t>(path_id),
0);
} else {
// Ignore other files
}
}
}
}
}
if (!found_file) {
return Status::Corruption(dbname_, "repair found no files");
}
return Status::OK();
}
void ConvertLogFilesToTables() {
const auto& wal_dir = immutable_db_options_.GetWalDir();
for (size_t i = 0; i < logs_.size(); i++) {
// we should use LogFileName(wal_dir, logs_[i]) here. user might uses
// wal_dir option.
std::string logname = LogFileName(wal_dir, logs_[i]);
Status status = ConvertLogToTable(wal_dir, logs_[i]);
if (!status.ok()) {
ROCKS_LOG_WARN(db_options_.info_log,
"Log #%" PRIu64 ": ignoring conversion error: %s",
logs_[i], status.ToString().c_str());
}
ArchiveFile(logname);
}
}
Status ConvertLogToTable(const std::string& wal_dir, uint64_t log) {
struct LogReporter : public log::Reader::Reporter {
Env* env;
std::shared_ptr<Logger> info_log;
uint64_t lognum;
void Corruption(size_t bytes, const Status& s) override {
// We print error messages for corruption, but continue repairing.
ROCKS_LOG_ERROR(info_log, "Log #%" PRIu64 ": dropping %d bytes; %s",
lognum, static_cast<int>(bytes), s.ToString().c_str());
}
};
// Open the log file
std::string logname = LogFileName(wal_dir, log);
const auto& fs = env_->GetFileSystem();
std::unique_ptr<SequentialFileReader> lfile_reader;
Status status = SequentialFileReader::Create(
fs, logname, fs->OptimizeForLogRead(file_options_), &lfile_reader,
nullptr /* dbg */, nullptr /* rate limiter */);
if (!status.ok()) {
return status;
}
// Create the log reader.
LogReporter reporter;
reporter.env = env_;
reporter.info_log = db_options_.info_log;
reporter.lognum = log;
// We intentionally make log::Reader do checksumming so that
// corruptions cause entire commits to be skipped instead of
// propagating bad information (like overly large sequence
// numbers).
log::Reader reader(db_options_.info_log, std::move(lfile_reader), &reporter,
true /*enable checksum*/, log);
// Initialize per-column family memtables
for (auto* cfd : *vset_.GetColumnFamilySet()) {
cfd->CreateNewMemtable(*cfd->GetLatestMutableCFOptions(),
kMaxSequenceNumber);
}
auto cf_mems = new ColumnFamilyMemTablesImpl(vset_.GetColumnFamilySet());
// Read all the records and add to a memtable
const UnorderedMap<uint32_t, size_t>& running_ts_sz =
vset_.GetRunningColumnFamiliesTimestampSize();
std::string scratch;
Slice record;
WriteBatch batch;
int counter = 0;
while (reader.ReadRecord(&record, &scratch)) {
if (record.size() < WriteBatchInternal::kHeader) {
reporter.Corruption(record.size(),
Status::Corruption("log record too small"));
continue;
}
Status record_status = WriteBatchInternal::SetContents(&batch, record);
if (record_status.ok()) {
const UnorderedMap<uint32_t, size_t>& record_ts_sz =
reader.GetRecordedTimestampSize();
record_status = HandleWriteBatchTimestampSizeDifference(
&batch, running_ts_sz, record_ts_sz,
TimestampSizeConsistencyMode::kVerifyConsistency);
if (record_status.ok()) {
record_status =
WriteBatchInternal::InsertInto(&batch, cf_mems, nullptr, nullptr);
}
}
if (record_status.ok()) {
counter += WriteBatchInternal::Count(&batch);
} else {
ROCKS_LOG_WARN(db_options_.info_log, "Log #%" PRIu64 ": ignoring %s",
log, record_status.ToString().c_str());
}
}
// Dump a table for each column family with entries in this log file.
for (auto* cfd : *vset_.GetColumnFamilySet()) {
// Do not record a version edit for this conversion to a Table
// since ExtractMetaData() will also generate edits.
MemTable* mem = cfd->mem();
if (mem->IsEmpty()) {
continue;
}
FileMetaData meta;
meta.fd = FileDescriptor(next_file_number_++, 0, 0);
// TODO: plumb Env::IOActivity, Env::IOPriority
ReadOptions ro;
ro.total_order_seek = true;
Arena arena;
ScopedArenaPtr<InternalIterator> iter(
mem->NewIterator(ro, /*seqno_to_time_mapping=*/nullptr, &arena,
/*prefix_extractor=*/nullptr));
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.file_creation_time = current_time;
SnapshotChecker* snapshot_checker = DisableGCSnapshotChecker::Instance();
auto write_hint =
cfd->current()->storage_info()->CalculateSSTWriteHint(/*level=*/0);
std::vector<std::unique_ptr<FragmentedRangeTombstoneIterator>>
range_del_iters;
auto range_del_iter = mem->NewRangeTombstoneIterator(
ro, kMaxSequenceNumber, false /* immutable_memtable */);
if (range_del_iter != nullptr) {
range_del_iters.emplace_back(range_del_iter);
}
IOStatus io_s;
CompressionOptions default_compression;
// TODO: plumb Env::IOActivity, Env::IOPriority
const ReadOptions read_options;
const WriteOptions write_option(Env::IO_HIGH);
TableBuilderOptions tboptions(
*cfd->ioptions(), *cfd->GetLatestMutableCFOptions(), read_options,
write_option, cfd->internal_comparator(),
cfd->internal_tbl_prop_coll_factories(), kNoCompression,
default_compression, cfd->GetID(), cfd->GetName(), -1 /* level */,
false /* is_bottommost */, TableFileCreationReason::kRecovery,
0 /* oldest_key_time */, 0 /* file_creation_time */,
"DB Repairer" /* db_id */, db_session_id_, 0 /*target_file_size*/,
meta.fd.GetNumber());
SeqnoToTimeMapping empty_seqno_to_time_mapping;
status = BuildTable(
dbname_, /* versions */ nullptr, immutable_db_options_, tboptions,
file_options_, table_cache_.get(), iter.get(),
std::move(range_del_iters), &meta, nullptr /* blob_file_additions */,
{}, kMaxSequenceNumber, kMaxSequenceNumber, kMaxSequenceNumber,
snapshot_checker, false /* paranoid_file_checks*/,
nullptr /* internal_stats */, &io_s, nullptr /*IOTracer*/,
BlobFileCreationReason::kRecovery,
nullptr /* seqno_to_time_mapping */, nullptr /* event_logger */,
0 /* job_id */, nullptr /* table_properties */, write_hint);
ROCKS_LOG_INFO(db_options_.info_log,
"Log #%" PRIu64 ": %d ops saved to Table #%" PRIu64 " %s",
log, counter, meta.fd.GetNumber(),
status.ToString().c_str());
if (status.ok()) {
if (meta.fd.GetFileSize() > 0) {
table_fds_.push_back(meta.fd);
}
} else {
break;
}
}
delete cf_mems;
return status;
}
void ExtractMetaData() {
for (size_t i = 0; i < table_fds_.size(); i++) {
TableInfo t;
t.meta.fd = table_fds_[i];
Status status = ScanTable(&t);
if (!status.ok()) {
std::string fname = TableFileName(
db_options_.db_paths, t.meta.fd.GetNumber(), t.meta.fd.GetPathId());
char file_num_buf[kFormatFileNumberBufSize];
FormatFileNumber(t.meta.fd.GetNumber(), t.meta.fd.GetPathId(),
file_num_buf, sizeof(file_num_buf));
ROCKS_LOG_WARN(db_options_.info_log, "Table #%s: ignoring %s",
file_num_buf, status.ToString().c_str());
ArchiveFile(fname);
} else {
tables_.push_back(t);
}
}
}
Status ScanTable(TableInfo* t) {
std::string fname = TableFileName(
db_options_.db_paths, t->meta.fd.GetNumber(), t->meta.fd.GetPathId());
int counter = 0;
uint64_t file_size;
Status status = env_->GetFileSize(fname, &file_size);
t->meta.fd = FileDescriptor(t->meta.fd.GetNumber(), t->meta.fd.GetPathId(),
file_size);
std::shared_ptr<const TableProperties> props;
if (status.ok()) {
// TODO: plumb Env::IOActivity, Env::IOPriority
const ReadOptions read_options;
status = table_cache_->GetTableProperties(
file_options_, read_options, icmp_, t->meta, &props,
0 /* block_protection_bytes_per_key */);
}
if (status.ok()) {
auto s =
GetSstInternalUniqueId(props->db_id, props->db_session_id,
props->orig_file_number, &t->meta.unique_id);
if (!s.ok()) {
ROCKS_LOG_WARN(db_options_.info_log,
"Table #%" PRIu64
": unable to get unique id, default to Unknown.",
t->meta.fd.GetNumber());
}
t->column_family_id = static_cast<uint32_t>(props->column_family_id);
if (t->column_family_id ==
TablePropertiesCollectorFactory::Context::kUnknownColumnFamily) {
ROCKS_LOG_WARN(
db_options_.info_log,
"Table #%" PRIu64
": column family unknown (probably due to legacy format); "
"adding to default column family id 0.",
t->meta.fd.GetNumber());
t->column_family_id = 0;
}
if (vset_.GetColumnFamilySet()->GetColumnFamily(t->column_family_id) ==
nullptr) {
status =
AddColumnFamily(props->column_family_name, t->column_family_id);
}
t->meta.oldest_ancester_time = props->creation_time;
t->meta.user_defined_timestamps_persisted =
static_cast<bool>(props->user_defined_timestamps_persisted);
}
if (status.ok()) {
uint64_t tail_size = 0;
bool contain_no_data_blocks =
props->num_entries > 0 &&
(props->num_entries == props->num_range_deletions);
if (props->tail_start_offset > 0 || contain_no_data_blocks) {
assert(props->tail_start_offset <= file_size);
tail_size = file_size - props->tail_start_offset;
}
t->meta.tail_size = tail_size;
}
ColumnFamilyData* cfd = nullptr;
if (status.ok()) {
cfd = vset_.GetColumnFamilySet()->GetColumnFamily(t->column_family_id);
if (cfd->GetName() != props->column_family_name) {
ROCKS_LOG_ERROR(
db_options_.info_log,
"Table #%" PRIu64
": inconsistent column family name '%s'; expected '%s' for column "
"family id %" PRIu32 ".",
t->meta.fd.GetNumber(), props->column_family_name.c_str(),
cfd->GetName().c_str(), t->column_family_id);
status = Status::Corruption(dbname_, "inconsistent column family name");
}
}
if (status.ok()) {
// TODO: plumb Env::IOActivity, Env::IOPriority
ReadOptions ropts;
ropts.total_order_seek = true;
InternalIterator* iter = table_cache_->NewIterator(
ropts, file_options_, cfd->internal_comparator(), t->meta,
nullptr /* range_del_agg */,
cfd->GetLatestMutableCFOptions()->prefix_extractor,
/*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr,
TableReaderCaller::kRepair, /*arena=*/nullptr, /*skip_filters=*/false,
/*level=*/-1, /*max_file_size_for_l0_meta_pin=*/0,
/*smallest_compaction_key=*/nullptr,
/*largest_compaction_key=*/nullptr,
/*allow_unprepared_value=*/false,
cfd->GetLatestMutableCFOptions()->block_protection_bytes_per_key);
ParsedInternalKey parsed;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
Slice key = iter->key();
Status pik_status =
ParseInternalKey(key, &parsed, db_options_.allow_data_in_errors);
if (!pik_status.ok()) {
ROCKS_LOG_ERROR(db_options_.info_log,
"Table #%" PRIu64 ": unparsable key - %s",
t->meta.fd.GetNumber(), pik_status.getState());
continue;
}
counter++;
status = t->meta.UpdateBoundaries(key, iter->value(), parsed.sequence,
parsed.type);
if (!status.ok()) {
break;
}
}
if (status.ok() && !iter->status().ok()) {
status = iter->status();
}
delete iter;
ROCKS_LOG_INFO(db_options_.info_log, "Table #%" PRIu64 ": %d entries %s",
t->meta.fd.GetNumber(), counter,
status.ToString().c_str());
}
if (status.ok()) {
// XXX/FIXME: This is just basic, naive handling of range tombstones,
// like call to UpdateBoundariesForRange in builder.cc where we assume
// an SST file is a full sorted run. This probably needs the extra logic
// from compaction_job.cc around call to UpdateBoundariesForRange (to
// handle range tombstones extendingg beyond range of other entries).
// TODO: plumb Env::IOActivity, Env::IOPriority
ReadOptions ropts;
std::unique_ptr<FragmentedRangeTombstoneIterator> r_iter;
status = table_cache_->GetRangeTombstoneIterator(
ropts, cfd->internal_comparator(), t->meta,
cfd->GetLatestMutableCFOptions()->block_protection_bytes_per_key,
&r_iter);
if (r_iter) {
r_iter->SeekToFirst();
while (r_iter->Valid()) {
auto tombstone = r_iter->Tombstone();
auto kv = tombstone.Serialize();
t->meta.UpdateBoundariesForRange(
kv.first, tombstone.SerializeEndKey(), tombstone.seq_,
cfd->internal_comparator());
r_iter->Next();
}
}
}
return status;
}
Status AddTables() {
// TODO: plumb Env::IOActivity, Env::IOPriority;
const ReadOptions read_options;
const WriteOptions write_options;
std::unordered_map<uint32_t, std::vector<const TableInfo*>> cf_id_to_tables;
SequenceNumber max_sequence = 0;
for (size_t i = 0; i < tables_.size(); i++) {
cf_id_to_tables[tables_[i].column_family_id].push_back(&tables_[i]);
if (max_sequence < tables_[i].meta.fd.largest_seqno) {
max_sequence = tables_[i].meta.fd.largest_seqno;
}
}
vset_.SetLastAllocatedSequence(max_sequence);
vset_.SetLastPublishedSequence(max_sequence);
vset_.SetLastSequence(max_sequence);
for (const auto& cf_id_and_tables : cf_id_to_tables) {
auto* cfd =
vset_.GetColumnFamilySet()->GetColumnFamily(cf_id_and_tables.first);
// Recover files' epoch number using dummy VersionStorageInfo
VersionBuilder dummy_version_builder(
cfd->current()->version_set()->file_options(), cfd->ioptions(),
cfd->table_cache(), cfd->current()->storage_info(),
cfd->current()->version_set(),
cfd->GetFileMetadataCacheReservationManager());
VersionStorageInfo dummy_vstorage(
&cfd->internal_comparator(), cfd->user_comparator(),
cfd->NumberLevels(), cfd->ioptions()->compaction_style,
nullptr /* src_vstorage */, cfd->ioptions()->force_consistency_checks,
EpochNumberRequirement::kMightMissing, cfd->ioptions()->clock,
/*bottommost_file_compaction_delay=*/0,
cfd->current()->version_set()->offpeak_time_option());
Status s;
VersionEdit dummy_edit;
for (const auto* table : cf_id_and_tables.second) {
// TODO(opt): separate out into multiple levels
dummy_edit.AddFile(
0, table->meta.fd.GetNumber(), table->meta.fd.GetPathId(),
table->meta.fd.GetFileSize(), table->meta.smallest,
table->meta.largest, table->meta.fd.smallest_seqno,
table->meta.fd.largest_seqno, table->meta.marked_for_compaction,
table->meta.temperature, table->meta.oldest_blob_file_number,
table->meta.oldest_ancester_time, table->meta.file_creation_time,
table->meta.epoch_number, table->meta.file_checksum,
table->meta.file_checksum_func_name, table->meta.unique_id,
table->meta.compensated_range_deletion_size, table->meta.tail_size,
table->meta.user_defined_timestamps_persisted);
}
s = dummy_version_builder.Apply(&dummy_edit);
if (s.ok()) {
s = dummy_version_builder.SaveTo(&dummy_vstorage);
}
if (s.ok()) {
dummy_vstorage.RecoverEpochNumbers(cfd);
}
if (s.ok()) {
// Record changes from this repair in VersionEdit, including files with
// recovered epoch numbers
VersionEdit edit;
edit.SetComparatorName(cfd->user_comparator()->Name());
edit.SetPersistUserDefinedTimestamps(
cfd->ioptions()->persist_user_defined_timestamps);
edit.SetLogNumber(0);
edit.SetNextFile(next_file_number_);
edit.SetColumnFamily(cfd->GetID());
for (int level = 0; level < dummy_vstorage.num_levels(); ++level) {
for (FileMetaData* file_meta : dummy_vstorage.LevelFiles(level)) {
edit.AddFile(level, *file_meta);
}
}
// Release resources occupied by the dummy VersionStorageInfo
for (int level = 0; level < dummy_vstorage.num_levels(); ++level) {
for (FileMetaData* file_meta : dummy_vstorage.LevelFiles(level)) {
file_meta->refs--;
if (file_meta->refs <= 0) {
delete file_meta;
}
}
}
// Persist record of changes
assert(next_file_number_ > 0);
vset_.MarkFileNumberUsed(next_file_number_ - 1);
mutex_.Lock();
std::unique_ptr<FSDirectory> db_dir;
s = env_->GetFileSystem()->NewDirectory(dbname_, IOOptions(), &db_dir,
nullptr);
if (s.ok()) {
s = vset_.LogAndApply(cfd, *cfd->GetLatestMutableCFOptions(),
read_options, write_options, &edit, &mutex_,
db_dir.get(), false /* new_descriptor_log */);
}
mutex_.Unlock();
}
if (!s.ok()) {
return s;
}
}
return Status::OK();
}
void ArchiveFile(const std::string& fname) {
// Move into another directory. E.g., for
// dir/foo
// rename to
// dir/lost/foo
const char* slash = strrchr(fname.c_str(), '/');
std::string new_dir;
if (slash != nullptr) {
new_dir.assign(fname.data(), slash - fname.data());
}
new_dir.append("/lost");
env_->CreateDir(new_dir).PermitUncheckedError(); // Ignore error
std::string new_file = new_dir;
new_file.append("/");
new_file.append((slash == nullptr) ? fname.c_str() : slash + 1);
Status s = env_->RenameFile(fname, new_file);
ROCKS_LOG_INFO(db_options_.info_log, "Archiving %s: %s\n", fname.c_str(),
s.ToString().c_str());
}
};
Status GetDefaultCFOptions(
const std::vector<ColumnFamilyDescriptor>& column_families,
ColumnFamilyOptions* res) {
assert(res != nullptr);
auto iter = std::find_if(column_families.begin(), column_families.end(),
[](const ColumnFamilyDescriptor& cfd) {
return cfd.name == kDefaultColumnFamilyName;
});
if (iter == column_families.end()) {
return Status::InvalidArgument(
"column_families", "Must contain entry for default column family");
}
*res = iter->options;
return Status::OK();
}
} // anonymous namespace
Status RepairDB(const std::string& dbname, const DBOptions& db_options,
const std::vector<ColumnFamilyDescriptor>& column_families) {
ColumnFamilyOptions default_cf_opts;
Status status = GetDefaultCFOptions(column_families, &default_cf_opts);
if (!status.ok()) {
return status;
}
Repairer repairer(dbname, db_options, column_families, default_cf_opts,
ColumnFamilyOptions() /* unknown_cf_opts */,
false /* create_unknown_cfs */);
status = repairer.Run();
if (status.ok()) {
status = repairer.Close();
}
return status;
}
Status RepairDB(const std::string& dbname, const DBOptions& db_options,
const std::vector<ColumnFamilyDescriptor>& column_families,
const ColumnFamilyOptions& unknown_cf_opts) {
ColumnFamilyOptions default_cf_opts;
Status status = GetDefaultCFOptions(column_families, &default_cf_opts);
if (!status.ok()) {
return status;
}
Repairer repairer(dbname, db_options, column_families, default_cf_opts,
unknown_cf_opts, true /* create_unknown_cfs */);
status = repairer.Run();
if (status.ok()) {
status = repairer.Close();
}
return status;
}
Status RepairDB(const std::string& dbname, const Options& options) {
Options opts(options);
DBOptions db_options(opts);
ColumnFamilyOptions cf_options(opts);
Repairer repairer(dbname, db_options, {}, cf_options /* default_cf_opts */,
cf_options /* unknown_cf_opts */,
true /* create_unknown_cfs */);
Status status = repairer.Run();
if (status.ok()) {
status = repairer.Close();
}
return status;
}
} // namespace ROCKSDB_NAMESPACE
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