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rocksdb/db/db_filesnapshot.cc

152 lines
4.3 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) 2012 Facebook.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ROCKSDB_LITE
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
#include <inttypes.h>
#include <stdint.h>
#include <algorithm>
#include <string>
#include "db/db_impl.h"
#include "db/job_context.h"
#include "db/version_set.h"
#include "port/port.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "util/file_util.h"
#include "util/filename.h"
#include "util/mutexlock.h"
#include "util/sync_point.h"
namespace rocksdb {
Status DBImpl::DisableFileDeletions() {
InstrumentedMutexLock l(&mutex_);
++disable_delete_obsolete_files_;
if (disable_delete_obsolete_files_ == 1) {
ROCKS_LOG_INFO(immutable_db_options_.info_log, "File Deletions Disabled");
} else {
ROCKS_LOG_WARN(immutable_db_options_.info_log,
"File Deletions Disabled, but already disabled. Counter: %d",
disable_delete_obsolete_files_);
}
return Status::OK();
}
Status DBImpl::EnableFileDeletions(bool force) {
// Job id == 0 means that this is not our background process, but rather
// user thread
JobContext job_context(0);
bool should_purge_files = false;
{
InstrumentedMutexLock l(&mutex_);
if (force) {
// if force, we need to enable file deletions right away
disable_delete_obsolete_files_ = 0;
} else if (disable_delete_obsolete_files_ > 0) {
--disable_delete_obsolete_files_;
}
if (disable_delete_obsolete_files_ == 0) {
ROCKS_LOG_INFO(immutable_db_options_.info_log, "File Deletions Enabled");
should_purge_files = true;
FindObsoleteFiles(&job_context, true);
} else {
ROCKS_LOG_WARN(
immutable_db_options_.info_log,
"File Deletions Enable, but not really enabled. Counter: %d",
disable_delete_obsolete_files_);
}
}
if (should_purge_files) {
PurgeObsoleteFiles(job_context);
}
job_context.Clean();
LogFlush(immutable_db_options_.info_log);
return Status::OK();
}
int DBImpl::IsFileDeletionsEnabled() const {
return disable_delete_obsolete_files_;
}
Status DBImpl::GetLiveFiles(std::vector<std::string>& ret,
uint64_t* manifest_file_size,
bool flush_memtable) {
*manifest_file_size = 0;
mutex_.Lock();
if (flush_memtable) {
// flush all dirty data to disk.
Status status;
for (auto cfd : *versions_->GetColumnFamilySet()) {
if (cfd->IsDropped()) {
continue;
}
cfd->Ref();
mutex_.Unlock();
status = FlushMemTable(cfd, FlushOptions());
TEST_SYNC_POINT("DBImpl::GetLiveFiles:1");
TEST_SYNC_POINT("DBImpl::GetLiveFiles:2");
mutex_.Lock();
cfd->Unref();
if (!status.ok()) {
break;
}
}
versions_->GetColumnFamilySet()->FreeDeadColumnFamilies();
if (!status.ok()) {
mutex_.Unlock();
ROCKS_LOG_ERROR(immutable_db_options_.info_log, "Cannot Flush data %s\n",
status.ToString().c_str());
return status;
}
}
// Make a set of all of the live *.sst files
std::vector<FileDescriptor> live;
for (auto cfd : *versions_->GetColumnFamilySet()) {
if (cfd->IsDropped()) {
continue;
}
cfd->current()->AddLiveFiles(&live);
}
ret.clear();
ret.reserve(live.size() + 3); // *.sst + CURRENT + MANIFEST + OPTIONS
// create names of the live files. The names are not absolute
// paths, instead they are relative to dbname_;
for (auto live_file : live) {
ret.push_back(MakeTableFileName("", live_file.GetNumber()));
}
ret.push_back(CurrentFileName(""));
ret.push_back(DescriptorFileName("", versions_->manifest_file_number()));
ret.push_back(OptionsFileName("", versions_->options_file_number()));
// find length of manifest file while holding the mutex lock
*manifest_file_size = versions_->manifest_file_size();
mutex_.Unlock();
return Status::OK();
}
Status DBImpl::GetSortedWalFiles(VectorLogPtr& files) {
return wal_manager_.GetSortedWalFiles(files);
}
}
#endif // ROCKSDB_LITE