mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-28 15:33:54 +00:00
ab13d43e1d
Summary: Calculate ```IOOptions::timeout``` using ```ReadOptions::deadline``` and pass it to ```FileSystem::Read/FileSystem::MultiRead```. This allows us to impose a tighter bound on the time taken by Get/MultiGet on FileSystem/Envs that support IO timeouts. Even on those that don't support, check in ```RandomAccessFileReader::Read``` and ```MultiRead``` and return ```Status::TimedOut()``` if the deadline is exceeded. For now, TableReader creation, which might do file opens and reads, are not covered. It will be implemented in another PR. Tests: Update existing unit tests to verify the correct timeout value is being passed Pull Request resolved: https://github.com/facebook/rocksdb/pull/6751 Reviewed By: riversand963 Differential Revision: D21285631 Pulled By: anand1976 fbshipit-source-id: d89af843e5a91ece866e87aa29438b52a65a8567
50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
// 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).
|
|
//
|
|
#pragma once
|
|
#include <string>
|
|
|
|
#include "file/filename.h"
|
|
#include "options/db_options.h"
|
|
#include "rocksdb/env.h"
|
|
#include "rocksdb/file_system.h"
|
|
#include "rocksdb/status.h"
|
|
#include "rocksdb/types.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
// use_fsync maps to options.use_fsync, which determines the way that
|
|
// the file is synced after copying.
|
|
extern Status CopyFile(FileSystem* fs, const std::string& source,
|
|
const std::string& destination, uint64_t size,
|
|
bool use_fsync);
|
|
|
|
extern Status CreateFile(FileSystem* fs, const std::string& destination,
|
|
const std::string& contents, bool use_fsync);
|
|
|
|
extern Status DeleteDBFile(const ImmutableDBOptions* db_options,
|
|
const std::string& fname,
|
|
const std::string& path_to_sync, const bool force_bg,
|
|
const bool force_fg);
|
|
|
|
extern bool IsWalDirSameAsDBPath(const ImmutableDBOptions* db_options);
|
|
|
|
inline IOStatus PrepareIOFromReadOptions(const ReadOptions& ro, Env* env,
|
|
IOOptions& opts) {
|
|
if (!env) {
|
|
env = Env::Default();
|
|
}
|
|
|
|
if (ro.deadline.count()) {
|
|
std::chrono::microseconds now = std::chrono::microseconds(env->NowMicros());
|
|
if (now > ro.deadline) {
|
|
return IOStatus::TimedOut("Deadline exceeded");
|
|
}
|
|
opts.timeout = ro.deadline - now;
|
|
}
|
|
return IOStatus::OK();
|
|
}
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|