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rocksdb/db/db_filesnapshot.cc

114 lines
3.2 KiB

// Copyright (c) 2012 Facebook.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <algorithm>
#include <string>
#include <stdint.h>
#include "db/db_impl.h"
#include "db/filename.h"
#include "db/version_set.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "port/port.h"
#include "util/mutexlock.h"
namespace rocksdb {
Status DBImpl::DisableFileDeletions() {
MutexLock l(&mutex_);
disable_delete_obsolete_files_ = true;
Log(options_.info_log, "File Deletions Disabled");
return Status::OK();
}
Status DBImpl::EnableFileDeletions() {
MutexLock l(&mutex_);
disable_delete_obsolete_files_ = false;
Log(options_.info_log, "File Deletions Enabled");
return Status::OK();
}
Status DBImpl::GetLiveFiles(std::vector<std::string>& ret,
uint64_t* manifest_file_size,
bool flush_memtable) {
*manifest_file_size = 0;
if (flush_memtable) {
// flush all dirty data to disk.
Status status = Flush(FlushOptions());
if (!status.ok()) {
Log(options_.info_log, "Cannot Flush data %s\n",
status.ToString().c_str());
return status;
}
}
MutexLock l(&mutex_);
// Make a set of all of the live *.sst files
std::set<uint64_t> live;
versions_->AddLiveFilesCurrentVersion(&live);
ret.clear();
ret.reserve(live.size() + 2); //*.sst + CURRENT + MANIFEST
// 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(TableFileName("", live_file));
}
ret.push_back(CurrentFileName(""));
ret.push_back(DescriptorFileName("", versions_->ManifestFileNumber()));
// find length of manifest file while holding the mutex lock
*manifest_file_size = versions_->ManifestFileSize();
return Status::OK();
}
Status DBImpl::GetSortedWalFiles(VectorLogPtr& files) {
// First get sorted files in archive dir, then append sorted files from main
// dir to maintain sorted order
// list wal files in archive dir.
Status s;
std::string archivedir = ArchivalDirectory(dbname_);
if (env_->FileExists(archivedir)) {
s = AppendSortedWalsOfType(archivedir, files, kArchivedLogFile);
if (!s.ok()) {
return s;
}
}
// list wal files in main db dir.
return AppendSortedWalsOfType(dbname_, files, kAliveLogFile);
}
Status DBImpl::DeleteWalFiles(const VectorLogPtr& files) {
Status s;
std::string archivedir = ArchivalDirectory(dbname_);
std::string files_not_deleted;
for (const auto& wal : files) {
/* Try deleting in the dir that pathname points to for the logfile.
This may fail if we try to delete a log file which was live when captured
but is archived now. Try deleting it from archive also
*/
Status st = env_->DeleteFile(dbname_ + "/" + wal->PathName());
if (!st.ok()) {
if (wal->Type() == kAliveLogFile &&
env_->DeleteFile(LogFileName(archivedir, wal->LogNumber())).ok()) {
continue;
}
files_not_deleted.append(wal->PathName());
}
}
if (!files_not_deleted.empty()) {
return Status::IOError("Deleted all requested files except: " +
files_not_deleted);
}
return Status::OK();
}
}