fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
548 lines
19 KiB
548 lines
19 KiB
// 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.
|
|
#include "db/db_impl.h"
|
|
|
|
#ifndef __STDC_FORMAT_MACROS
|
|
#define __STDC_FORMAT_MACROS
|
|
#endif
|
|
#include <inttypes.h>
|
|
#include "db/event_helpers.h"
|
|
#include "util/file_util.h"
|
|
#include "util/sst_file_manager_impl.h"
|
|
|
|
|
|
namespace rocksdb {
|
|
uint64_t DBImpl::FindMinPrepLogReferencedByMemTable() {
|
|
if (!allow_2pc()) {
|
|
return 0;
|
|
}
|
|
|
|
uint64_t min_log = 0;
|
|
|
|
// we must look through the memtables for two phase transactions
|
|
// that have been committed but not yet flushed
|
|
for (auto loop_cfd : *versions_->GetColumnFamilySet()) {
|
|
if (loop_cfd->IsDropped()) {
|
|
continue;
|
|
}
|
|
|
|
auto log = loop_cfd->imm()->GetMinLogContainingPrepSection();
|
|
|
|
if (log > 0 && (min_log == 0 || log < min_log)) {
|
|
min_log = log;
|
|
}
|
|
|
|
log = loop_cfd->mem()->GetMinLogContainingPrepSection();
|
|
|
|
if (log > 0 && (min_log == 0 || log < min_log)) {
|
|
min_log = log;
|
|
}
|
|
}
|
|
|
|
return min_log;
|
|
}
|
|
|
|
void DBImpl::MarkLogAsHavingPrepSectionFlushed(uint64_t log) {
|
|
assert(log != 0);
|
|
std::lock_guard<std::mutex> lock(prep_heap_mutex_);
|
|
auto it = prepared_section_completed_.find(log);
|
|
assert(it != prepared_section_completed_.end());
|
|
it->second += 1;
|
|
}
|
|
|
|
void DBImpl::MarkLogAsContainingPrepSection(uint64_t log) {
|
|
assert(log != 0);
|
|
std::lock_guard<std::mutex> lock(prep_heap_mutex_);
|
|
min_log_with_prep_.push(log);
|
|
auto it = prepared_section_completed_.find(log);
|
|
if (it == prepared_section_completed_.end()) {
|
|
prepared_section_completed_[log] = 0;
|
|
}
|
|
}
|
|
|
|
uint64_t DBImpl::FindMinLogContainingOutstandingPrep() {
|
|
|
|
if (!allow_2pc()) {
|
|
return 0;
|
|
}
|
|
|
|
std::lock_guard<std::mutex> lock(prep_heap_mutex_);
|
|
uint64_t min_log = 0;
|
|
|
|
// first we look in the prepared heap where we keep
|
|
// track of transactions that have been prepared (written to WAL)
|
|
// but not yet committed.
|
|
while (!min_log_with_prep_.empty()) {
|
|
min_log = min_log_with_prep_.top();
|
|
|
|
auto it = prepared_section_completed_.find(min_log);
|
|
|
|
// value was marked as 'deleted' from heap
|
|
if (it != prepared_section_completed_.end() && it->second > 0) {
|
|
it->second -= 1;
|
|
min_log_with_prep_.pop();
|
|
|
|
// back to squere one...
|
|
min_log = 0;
|
|
continue;
|
|
} else {
|
|
// found a valid value
|
|
break;
|
|
}
|
|
}
|
|
|
|
return min_log;
|
|
}
|
|
|
|
uint64_t DBImpl::MinLogNumberToKeep() {
|
|
uint64_t log_number = versions_->MinLogNumber();
|
|
|
|
if (allow_2pc()) {
|
|
// if are 2pc we must consider logs containing prepared
|
|
// sections of outstanding transactions.
|
|
//
|
|
// We must check min logs with outstanding prep before we check
|
|
// logs referneces by memtables because a log referenced by the
|
|
// first data structure could transition to the second under us.
|
|
//
|
|
// TODO(horuff): iterating over all column families under db mutex.
|
|
// should find more optimial solution
|
|
auto min_log_in_prep_heap = FindMinLogContainingOutstandingPrep();
|
|
|
|
if (min_log_in_prep_heap != 0 && min_log_in_prep_heap < log_number) {
|
|
log_number = min_log_in_prep_heap;
|
|
}
|
|
|
|
auto min_log_refed_by_mem = FindMinPrepLogReferencedByMemTable();
|
|
|
|
if (min_log_refed_by_mem != 0 && min_log_refed_by_mem < log_number) {
|
|
log_number = min_log_refed_by_mem;
|
|
}
|
|
}
|
|
return log_number;
|
|
}
|
|
|
|
// * Returns the list of live files in 'sst_live'
|
|
// If it's doing full scan:
|
|
// * Returns the list of all files in the filesystem in
|
|
// 'full_scan_candidate_files'.
|
|
// Otherwise, gets obsolete files from VersionSet.
|
|
// no_full_scan = true -- never do the full scan using GetChildren()
|
|
// force = false -- don't force the full scan, except every
|
|
// mutable_db_options_.delete_obsolete_files_period_micros
|
|
// force = true -- force the full scan
|
|
void DBImpl::FindObsoleteFiles(JobContext* job_context, bool force,
|
|
bool no_full_scan) {
|
|
mutex_.AssertHeld();
|
|
|
|
// if deletion is disabled, do nothing
|
|
if (disable_delete_obsolete_files_ > 0) {
|
|
return;
|
|
}
|
|
|
|
bool doing_the_full_scan = false;
|
|
|
|
// logic for figurint out if we're doing the full scan
|
|
if (no_full_scan) {
|
|
doing_the_full_scan = false;
|
|
} else if (force ||
|
|
mutable_db_options_.delete_obsolete_files_period_micros == 0) {
|
|
doing_the_full_scan = true;
|
|
} else {
|
|
const uint64_t now_micros = env_->NowMicros();
|
|
if ((delete_obsolete_files_last_run_ +
|
|
mutable_db_options_.delete_obsolete_files_period_micros) <
|
|
now_micros) {
|
|
doing_the_full_scan = true;
|
|
delete_obsolete_files_last_run_ = now_micros;
|
|
}
|
|
}
|
|
|
|
// don't delete files that might be currently written to from compaction
|
|
// threads
|
|
// Since job_context->min_pending_output is set, until file scan finishes,
|
|
// mutex_ cannot be released. Otherwise, we might see no min_pending_output
|
|
// here but later find newer generated unfinalized files while scannint.
|
|
if (!pending_outputs_.empty()) {
|
|
job_context->min_pending_output = *pending_outputs_.begin();
|
|
} else {
|
|
// delete all of them
|
|
job_context->min_pending_output = std::numeric_limits<uint64_t>::max();
|
|
}
|
|
|
|
// Get obsolete files. This function will also update the list of
|
|
// pending files in VersionSet().
|
|
versions_->GetObsoleteFiles(&job_context->sst_delete_files,
|
|
&job_context->manifest_delete_files,
|
|
job_context->min_pending_output);
|
|
|
|
// store the current filenum, lognum, etc
|
|
job_context->manifest_file_number = versions_->manifest_file_number();
|
|
job_context->pending_manifest_file_number =
|
|
versions_->pending_manifest_file_number();
|
|
job_context->log_number = MinLogNumberToKeep();
|
|
|
|
job_context->prev_log_number = versions_->prev_log_number();
|
|
|
|
versions_->AddLiveFiles(&job_context->sst_live);
|
|
if (doing_the_full_scan) {
|
|
for (size_t path_id = 0; path_id < immutable_db_options_.db_paths.size();
|
|
path_id++) {
|
|
// set of all files in the directory. We'll exclude files that are still
|
|
// alive in the subsequent processings.
|
|
std::vector<std::string> files;
|
|
env_->GetChildren(immutable_db_options_.db_paths[path_id].path,
|
|
&files); // Ignore errors
|
|
for (std::string file : files) {
|
|
// TODO(icanadi) clean up this mess to avoid having one-off "/" prefixes
|
|
job_context->full_scan_candidate_files.emplace_back(
|
|
"/" + file, static_cast<uint32_t>(path_id));
|
|
}
|
|
}
|
|
|
|
// Add log files in wal_dir
|
|
if (immutable_db_options_.wal_dir != dbname_) {
|
|
std::vector<std::string> log_files;
|
|
env_->GetChildren(immutable_db_options_.wal_dir,
|
|
&log_files); // Ignore errors
|
|
for (std::string log_file : log_files) {
|
|
job_context->full_scan_candidate_files.emplace_back(log_file, 0);
|
|
}
|
|
}
|
|
// Add info log files in db_log_dir
|
|
if (!immutable_db_options_.db_log_dir.empty() &&
|
|
immutable_db_options_.db_log_dir != dbname_) {
|
|
std::vector<std::string> info_log_files;
|
|
// Ignore errors
|
|
env_->GetChildren(immutable_db_options_.db_log_dir, &info_log_files);
|
|
for (std::string log_file : info_log_files) {
|
|
job_context->full_scan_candidate_files.emplace_back(log_file, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
// logs_ is empty when called during recovery, in which case there can't yet
|
|
// be any tracked obsolete logs
|
|
if (!alive_log_files_.empty() && !logs_.empty()) {
|
|
uint64_t min_log_number = job_context->log_number;
|
|
size_t num_alive_log_files = alive_log_files_.size();
|
|
// find newly obsoleted log files
|
|
while (alive_log_files_.begin()->number < min_log_number) {
|
|
auto& earliest = *alive_log_files_.begin();
|
|
if (immutable_db_options_.recycle_log_file_num >
|
|
log_recycle_files.size()) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"adding log %" PRIu64 " to recycle list\n",
|
|
earliest.number);
|
|
log_recycle_files.push_back(earliest.number);
|
|
} else {
|
|
job_context->log_delete_files.push_back(earliest.number);
|
|
}
|
|
if (job_context->size_log_to_delete == 0) {
|
|
job_context->prev_total_log_size = total_log_size_;
|
|
job_context->num_alive_log_files = num_alive_log_files;
|
|
}
|
|
job_context->size_log_to_delete += earliest.size;
|
|
total_log_size_ -= earliest.size;
|
|
if (concurrent_prepare_) {
|
|
log_write_mutex_.Lock();
|
|
}
|
|
alive_log_files_.pop_front();
|
|
if (concurrent_prepare_) {
|
|
log_write_mutex_.Unlock();
|
|
}
|
|
// Current log should always stay alive since it can't have
|
|
// number < MinLogNumber().
|
|
assert(alive_log_files_.size());
|
|
}
|
|
while (!logs_.empty() && logs_.front().number < min_log_number) {
|
|
auto& log = logs_.front();
|
|
if (log.getting_synced) {
|
|
log_sync_cv_.Wait();
|
|
// logs_ could have changed while we were waiting.
|
|
continue;
|
|
}
|
|
logs_to_free_.push_back(log.ReleaseWriter());
|
|
{
|
|
InstrumentedMutexLock wl(&log_write_mutex_);
|
|
logs_.pop_front();
|
|
}
|
|
}
|
|
// Current log cannot be obsolete.
|
|
assert(!logs_.empty());
|
|
}
|
|
|
|
// We're just cleaning up for DB::Write().
|
|
assert(job_context->logs_to_free.empty());
|
|
job_context->logs_to_free = logs_to_free_;
|
|
job_context->log_recycle_files.assign(log_recycle_files.begin(),
|
|
log_recycle_files.end());
|
|
logs_to_free_.clear();
|
|
}
|
|
|
|
namespace {
|
|
bool CompareCandidateFile(const JobContext::CandidateFileInfo& first,
|
|
const JobContext::CandidateFileInfo& second) {
|
|
if (first.file_name > second.file_name) {
|
|
return true;
|
|
} else if (first.file_name < second.file_name) {
|
|
return false;
|
|
} else {
|
|
return (first.path_id > second.path_id);
|
|
}
|
|
}
|
|
}; // namespace
|
|
|
|
// Delete obsolete files and log status and information of file deletion
|
|
void DBImpl::DeleteObsoleteFileImpl(Status file_deletion_status, int job_id,
|
|
const std::string& fname, FileType type,
|
|
uint64_t number, uint32_t path_id) {
|
|
if (type == kTableFile) {
|
|
file_deletion_status =
|
|
DeleteSSTFile(&immutable_db_options_, fname, path_id);
|
|
} else {
|
|
file_deletion_status = env_->DeleteFile(fname);
|
|
}
|
|
if (file_deletion_status.ok()) {
|
|
ROCKS_LOG_DEBUG(immutable_db_options_.info_log,
|
|
"[JOB %d] Delete %s type=%d #%" PRIu64 " -- %s\n", job_id,
|
|
fname.c_str(), type, number,
|
|
file_deletion_status.ToString().c_str());
|
|
} else if (env_->FileExists(fname).IsNotFound()) {
|
|
ROCKS_LOG_INFO(
|
|
immutable_db_options_.info_log,
|
|
"[JOB %d] Tried to delete a non-existing file %s type=%d #%" PRIu64
|
|
" -- %s\n",
|
|
job_id, fname.c_str(), type, number,
|
|
file_deletion_status.ToString().c_str());
|
|
} else {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"[JOB %d] Failed to delete %s type=%d #%" PRIu64 " -- %s\n",
|
|
job_id, fname.c_str(), type, number,
|
|
file_deletion_status.ToString().c_str());
|
|
}
|
|
if (type == kTableFile) {
|
|
EventHelpers::LogAndNotifyTableFileDeletion(
|
|
&event_logger_, job_id, number, fname, file_deletion_status, GetName(),
|
|
immutable_db_options_.listeners);
|
|
}
|
|
}
|
|
|
|
// Diffs the files listed in filenames and those that do not
|
|
// belong to live files are posibly removed. Also, removes all the
|
|
// files in sst_delete_files and log_delete_files.
|
|
// It is not necessary to hold the mutex when invoking this method.
|
|
void DBImpl::PurgeObsoleteFiles(const JobContext& state, bool schedule_only) {
|
|
// we'd better have sth to delete
|
|
assert(state.HaveSomethingToDelete());
|
|
|
|
// this checks if FindObsoleteFiles() was run before. If not, don't do
|
|
// PurgeObsoleteFiles(). If FindObsoleteFiles() was run, we need to also
|
|
// run PurgeObsoleteFiles(), even if disable_delete_obsolete_files_ is true
|
|
if (state.manifest_file_number == 0) {
|
|
return;
|
|
}
|
|
|
|
// Now, convert live list to an unordered map, WITHOUT mutex held;
|
|
// set is slow.
|
|
std::unordered_map<uint64_t, const FileDescriptor*> sst_live_map;
|
|
for (const FileDescriptor& fd : state.sst_live) {
|
|
sst_live_map[fd.GetNumber()] = &fd;
|
|
}
|
|
std::unordered_set<uint64_t> log_recycle_files_set(
|
|
state.log_recycle_files.begin(), state.log_recycle_files.end());
|
|
|
|
auto candidate_files = state.full_scan_candidate_files;
|
|
candidate_files.reserve(
|
|
candidate_files.size() + state.sst_delete_files.size() +
|
|
state.log_delete_files.size() + state.manifest_delete_files.size());
|
|
// We may ignore the dbname when generating the file names.
|
|
const char* kDumbDbName = "";
|
|
for (auto file : state.sst_delete_files) {
|
|
candidate_files.emplace_back(
|
|
MakeTableFileName(kDumbDbName, file->fd.GetNumber()),
|
|
file->fd.GetPathId());
|
|
if (file->table_reader_handle) {
|
|
table_cache_->Release(file->table_reader_handle);
|
|
}
|
|
delete file;
|
|
}
|
|
|
|
for (auto file_num : state.log_delete_files) {
|
|
if (file_num > 0) {
|
|
candidate_files.emplace_back(LogFileName(kDumbDbName, file_num), 0);
|
|
}
|
|
}
|
|
for (const auto& filename : state.manifest_delete_files) {
|
|
candidate_files.emplace_back(filename, 0);
|
|
}
|
|
|
|
// dedup state.candidate_files so we don't try to delete the same
|
|
// file twice
|
|
std::sort(candidate_files.begin(), candidate_files.end(),
|
|
CompareCandidateFile);
|
|
candidate_files.erase(
|
|
std::unique(candidate_files.begin(), candidate_files.end()),
|
|
candidate_files.end());
|
|
|
|
if (state.prev_total_log_size > 0) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"[JOB %d] Try to delete WAL files size %" PRIu64
|
|
", prev total WAL file size %" PRIu64
|
|
", number of live WAL files %" ROCKSDB_PRIszt ".\n",
|
|
state.job_id, state.size_log_to_delete,
|
|
state.prev_total_log_size, state.num_alive_log_files);
|
|
}
|
|
|
|
std::vector<std::string> old_info_log_files;
|
|
InfoLogPrefix info_log_prefix(!immutable_db_options_.db_log_dir.empty(),
|
|
dbname_);
|
|
for (const auto& candidate_file : candidate_files) {
|
|
std::string to_delete = candidate_file.file_name;
|
|
uint32_t path_id = candidate_file.path_id;
|
|
uint64_t number;
|
|
FileType type;
|
|
// Ignore file if we cannot recognize it.
|
|
if (!ParseFileName(to_delete, &number, info_log_prefix.prefix, &type)) {
|
|
continue;
|
|
}
|
|
|
|
bool keep = true;
|
|
switch (type) {
|
|
case kLogFile:
|
|
keep = ((number >= state.log_number) ||
|
|
(number == state.prev_log_number) ||
|
|
(log_recycle_files_set.find(number) !=
|
|
log_recycle_files_set.end()));
|
|
break;
|
|
case kDescriptorFile:
|
|
// Keep my manifest file, and any newer incarnations'
|
|
// (can happen during manifest roll)
|
|
keep = (number >= state.manifest_file_number);
|
|
break;
|
|
case kTableFile:
|
|
// If the second condition is not there, this makes
|
|
// DontDeletePendingOutputs fail
|
|
keep = (sst_live_map.find(number) != sst_live_map.end()) ||
|
|
number >= state.min_pending_output;
|
|
break;
|
|
case kTempFile:
|
|
// Any temp files that are currently being written to must
|
|
// be recorded in pending_outputs_, which is inserted into "live".
|
|
// Also, SetCurrentFile creates a temp file when writing out new
|
|
// manifest, which is equal to state.pending_manifest_file_number. We
|
|
// should not delete that file
|
|
//
|
|
// TODO(yhchiang): carefully modify the third condition to safely
|
|
// remove the temp options files.
|
|
keep = (sst_live_map.find(number) != sst_live_map.end()) ||
|
|
(number == state.pending_manifest_file_number) ||
|
|
(to_delete.find(kOptionsFileNamePrefix) != std::string::npos);
|
|
break;
|
|
case kInfoLogFile:
|
|
keep = true;
|
|
if (number != 0) {
|
|
old_info_log_files.push_back(to_delete);
|
|
}
|
|
break;
|
|
case kCurrentFile:
|
|
case kDBLockFile:
|
|
case kIdentityFile:
|
|
case kMetaDatabase:
|
|
case kOptionsFile:
|
|
case kBlobFile:
|
|
keep = true;
|
|
break;
|
|
}
|
|
|
|
if (keep) {
|
|
continue;
|
|
}
|
|
|
|
std::string fname;
|
|
if (type == kTableFile) {
|
|
// evict from cache
|
|
TableCache::Evict(table_cache_.get(), number);
|
|
fname = TableFileName(immutable_db_options_.db_paths, number, path_id);
|
|
} else {
|
|
fname = ((type == kLogFile) ? immutable_db_options_.wal_dir : dbname_) +
|
|
"/" + to_delete;
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
if (type == kLogFile && (immutable_db_options_.wal_ttl_seconds > 0 ||
|
|
immutable_db_options_.wal_size_limit_mb > 0)) {
|
|
wal_manager_.ArchiveWALFile(fname, number);
|
|
continue;
|
|
}
|
|
#endif // !ROCKSDB_LITE
|
|
|
|
Status file_deletion_status;
|
|
if (schedule_only) {
|
|
InstrumentedMutexLock guard_lock(&mutex_);
|
|
SchedulePendingPurge(fname, type, number, path_id, state.job_id);
|
|
} else {
|
|
DeleteObsoleteFileImpl(file_deletion_status, state.job_id, fname, type,
|
|
number, path_id);
|
|
}
|
|
}
|
|
|
|
// Delete old info log files.
|
|
size_t old_info_log_file_count = old_info_log_files.size();
|
|
if (old_info_log_file_count != 0 &&
|
|
old_info_log_file_count >= immutable_db_options_.keep_log_file_num) {
|
|
std::sort(old_info_log_files.begin(), old_info_log_files.end());
|
|
size_t end =
|
|
old_info_log_file_count - immutable_db_options_.keep_log_file_num;
|
|
for (unsigned int i = 0; i <= end; i++) {
|
|
std::string& to_delete = old_info_log_files.at(i);
|
|
std::string full_path_to_delete =
|
|
(immutable_db_options_.db_log_dir.empty()
|
|
? dbname_
|
|
: immutable_db_options_.db_log_dir) +
|
|
"/" + to_delete;
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"[JOB %d] Delete info log file %s\n", state.job_id,
|
|
full_path_to_delete.c_str());
|
|
Status s = env_->DeleteFile(full_path_to_delete);
|
|
if (!s.ok()) {
|
|
if (env_->FileExists(full_path_to_delete).IsNotFound()) {
|
|
ROCKS_LOG_INFO(
|
|
immutable_db_options_.info_log,
|
|
"[JOB %d] Tried to delete non-existing info log file %s FAILED "
|
|
"-- %s\n",
|
|
state.job_id, to_delete.c_str(), s.ToString().c_str());
|
|
} else {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"[JOB %d] Delete info log file %s FAILED -- %s\n",
|
|
state.job_id, to_delete.c_str(),
|
|
s.ToString().c_str());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#ifndef ROCKSDB_LITE
|
|
wal_manager_.PurgeObsoleteWALFiles();
|
|
#endif // ROCKSDB_LITE
|
|
LogFlush(immutable_db_options_.info_log);
|
|
}
|
|
|
|
void DBImpl::DeleteObsoleteFiles() {
|
|
mutex_.AssertHeld();
|
|
JobContext job_context(next_job_id_.fetch_add(1));
|
|
FindObsoleteFiles(&job_context, true);
|
|
|
|
mutex_.Unlock();
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
PurgeObsoleteFiles(job_context);
|
|
}
|
|
job_context.Clean();
|
|
mutex_.Lock();
|
|
}
|
|
} // namespace rocksdb
|
|
|