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7125e24619
Summary: If user do not end the trace manually, the tracing will continue which can potential use up all the storage space and cause problem. In this PR, the max trace file size is added to the TraceOptions and user can set the value if they need or the default is 64GB. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4610 Differential Revision: D12893400 Pulled By: zhichao-cao fbshipit-source-id: acf4b5a6076bb691778bdfbac4864e1006758953
121 lines
3.6 KiB
C++
121 lines
3.6 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#include "utilities/trace/file_trace_reader_writer.h"
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#include "util/coding.h"
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#include "util/file_reader_writer.h"
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#include "util/trace_replay.h"
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namespace rocksdb {
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const unsigned int FileTraceReader::kBufferSize = 1024; // 1KB
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FileTraceReader::FileTraceReader(
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std::unique_ptr<RandomAccessFileReader>&& reader)
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: file_reader_(std::move(reader)),
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offset_(0),
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buffer_(new char[kBufferSize]) {}
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FileTraceReader::~FileTraceReader() {
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Close();
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delete[] buffer_;
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}
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Status FileTraceReader::Close() {
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file_reader_.reset();
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return Status::OK();
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}
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Status FileTraceReader::Read(std::string* data) {
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assert(file_reader_ != nullptr);
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Status s = file_reader_->Read(offset_, kTraceMetadataSize, &result_, buffer_);
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if (!s.ok()) {
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return s;
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}
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if (result_.size() == 0) {
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// No more data to read
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// Todo: Come up with a better way to indicate end of data. May be this
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// could be avoided once footer is introduced.
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return Status::Incomplete();
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}
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if (result_.size() < kTraceMetadataSize) {
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return Status::Corruption("Corrupted trace file.");
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}
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*data = result_.ToString();
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offset_ += kTraceMetadataSize;
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uint32_t payload_len =
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DecodeFixed32(&buffer_[kTraceTimestampSize + kTraceTypeSize]);
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// Read Payload
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unsigned int bytes_to_read = payload_len;
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unsigned int to_read =
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bytes_to_read > kBufferSize ? kBufferSize : bytes_to_read;
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while (to_read > 0) {
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s = file_reader_->Read(offset_, to_read, &result_, buffer_);
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if (!s.ok()) {
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return s;
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}
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if (result_.size() < to_read) {
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return Status::Corruption("Corrupted trace file.");
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}
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data->append(result_.data(), result_.size());
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offset_ += to_read;
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bytes_to_read -= to_read;
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to_read = bytes_to_read > kBufferSize ? kBufferSize : bytes_to_read;
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}
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return s;
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}
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FileTraceWriter::~FileTraceWriter() { Close(); }
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Status FileTraceWriter::Close() {
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file_writer_.reset();
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return Status::OK();
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}
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Status FileTraceWriter::Write(const Slice& data) {
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return file_writer_->Append(data);
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}
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uint64_t FileTraceWriter::GetFileSize() { return file_writer_->GetFileSize(); }
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Status NewFileTraceReader(Env* env, const EnvOptions& env_options,
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const std::string& trace_filename,
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std::unique_ptr<TraceReader>* trace_reader) {
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std::unique_ptr<RandomAccessFile> trace_file;
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Status s = env->NewRandomAccessFile(trace_filename, &trace_file, env_options);
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if (!s.ok()) {
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return s;
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}
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std::unique_ptr<RandomAccessFileReader> file_reader;
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file_reader.reset(
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new RandomAccessFileReader(std::move(trace_file), trace_filename));
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trace_reader->reset(new FileTraceReader(std::move(file_reader)));
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return s;
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}
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Status NewFileTraceWriter(Env* env, const EnvOptions& env_options,
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const std::string& trace_filename,
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std::unique_ptr<TraceWriter>* trace_writer) {
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std::unique_ptr<WritableFile> trace_file;
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Status s = env->NewWritableFile(trace_filename, &trace_file, env_options);
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if (!s.ok()) {
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return s;
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}
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std::unique_ptr<WritableFileWriter> file_writer;
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file_writer.reset(new WritableFileWriter(std::move(trace_file),
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trace_filename, env_options));
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trace_writer->reset(new FileTraceWriter(std::move(file_writer)));
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return s;
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}
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} // namespace rocksdb
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