70f0f50731
Summary: This allows ldb to control the write_buffer_size (which reflects to L0 file size) and file_size (which reflects to L1 file size). Since the target_file_size_ratio is 1 by default, all other levels will also have the same file size as L1. As part of the diff, I also cleaned up some unused code and help messages. Test Plan: ./ldb load --db=/data/users/zshao/test_leveldb --file_size=64000000 --write_buffer_size=32000000 --create_if_missing --input_hex --disable_wal Reviewers: dhruba, sheki, emayanke Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D7569
580 lines
17 KiB
C++
580 lines
17 KiB
C++
// Copyright (c) 2012 Facebook. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "leveldb/write_batch.h"
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#include "db/dbformat.h"
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#include "db/log_reader.h"
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#include "db/write_batch_internal.h"
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#include "util/ldb_cmd.h"
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namespace leveldb {
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const char* LDBCommand::BLOOM_ARG = "--bloom_bits=";
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const char* LDBCommand::COMPRESSION_TYPE_ARG = "--compression_type=";
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const char* LDBCommand::BLOCK_SIZE = "--block_size=";
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const char* LDBCommand::AUTO_COMPACTION = "--auto_compaction=";
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const char* LDBCommand::WRITE_BUFFER_SIZE_ARG = "--write_buffer_size=";
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const char* LDBCommand::FILE_SIZE_ARG = "--file_size=";
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void LDBCommand::parse_open_args(std::vector<std::string>& args) {
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std::vector<std::string> rest_of_args;
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for (unsigned int i = 0; i < args.size(); i++) {
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std::string& arg = args.at(i);
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if (arg.find(BLOOM_ARG) == 0
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|| arg.find(COMPRESSION_TYPE_ARG) == 0
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|| arg.find(BLOCK_SIZE) == 0
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|| arg.find(AUTO_COMPACTION) == 0
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|| arg.find(WRITE_BUFFER_SIZE_ARG) == 0
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|| arg.find(FILE_SIZE_ARG) == 0) {
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open_args_.push_back(arg);
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} else {
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rest_of_args.push_back(arg);
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}
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}
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swap(args, rest_of_args);
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}
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leveldb::Options LDBCommand::PrepareOptionsForOpenDB() {
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leveldb::Options opt;
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opt.create_if_missing = false;
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for (unsigned int i = 0; i < open_args_.size(); i++) {
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std::string& arg = open_args_.at(i);
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if (arg.find(BLOOM_ARG) == 0) {
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std::string bits_string = arg.substr(strlen(BLOOM_ARG));
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int bits = atoi(bits_string.c_str());
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if (bits == 0) {
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// Badly-formatted bits.
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exec_state_ = LDBCommandExecuteResult::FAILED(
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std::string("Badly-formatted bits: ") + bits_string);
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}
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opt.filter_policy = leveldb::NewBloomFilterPolicy(bits);
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} else if (arg.find(BLOCK_SIZE) == 0) {
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std::string block_size_string = arg.substr(strlen(BLOCK_SIZE));
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int block_size = atoi(block_size_string.c_str());
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if (block_size == 0) {
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// Badly-formatted bits.
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exec_state_ = LDBCommandExecuteResult::FAILED(
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std::string("Badly-formatted block size: ") + block_size_string);
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}
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opt.block_size = block_size;
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} else if (arg.find(AUTO_COMPACTION) == 0) {
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std::string value = arg.substr(strlen(AUTO_COMPACTION));
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if (value == "false") {
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opt.disable_auto_compactions = true;
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} else if (value == "true") {
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opt.disable_auto_compactions = false;
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} else {
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// Unknown compression.
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exec_state_ = LDBCommandExecuteResult::FAILED(
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"Unknown auto_compaction value: " + value);
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}
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} else if (arg.find(COMPRESSION_TYPE_ARG) == 0) {
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std::string comp = arg.substr(strlen(COMPRESSION_TYPE_ARG));
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if (comp == "no") {
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opt.compression = leveldb::kNoCompression;
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} else if (comp == "snappy") {
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opt.compression = leveldb::kSnappyCompression;
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} else if (comp == "zlib") {
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opt.compression = leveldb::kZlibCompression;
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} else if (comp == "bzip2") {
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opt.compression = leveldb::kBZip2Compression;
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} else {
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// Unknown compression.
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exec_state_ = LDBCommandExecuteResult::FAILED(
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"Unknown compression level: " + comp);
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}
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} else if (arg.find(WRITE_BUFFER_SIZE_ARG) == 0) {
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std::string write_buffer_str = arg.substr(strlen(WRITE_BUFFER_SIZE_ARG));
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int write_buffer_size = atoi(write_buffer_str.c_str());
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if (write_buffer_size == 0) {
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exec_state_ = LDBCommandExecuteResult::FAILED(
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std::string("Badly-formatted buffer size: ") + write_buffer_str);
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}
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opt.write_buffer_size = write_buffer_size;
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} else if (arg.find(FILE_SIZE_ARG) == 0) {
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std::string file_size_str = arg.substr(strlen(FILE_SIZE_ARG));
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int file_size = atoi(file_size_str.c_str());
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if (file_size == 0) {
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exec_state_ = LDBCommandExecuteResult::FAILED(
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std::string("Badly-formatted file size: ") + file_size_str);
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}
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opt.target_file_size_base = file_size;
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} else {
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exec_state_ = LDBCommandExecuteResult::FAILED(
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"Unknown option: " + arg);
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}
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}
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return opt;
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}
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const char* LDBCommand::FROM_ARG = "--from=";
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const char* LDBCommand::END_ARG = "--to=";
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const char* LDBCommand::HEX_ARG = "--hex";
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Compactor::Compactor(std::string& db_name, std::vector<std::string>& args) :
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LDBCommand(db_name, args), null_from_(true), null_to_(true), hex_(false) {
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for (unsigned int i = 0; i < args.size(); i++) {
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std::string& arg = args.at(i);
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if (arg.find(FROM_ARG) == 0) {
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null_from_ = false;
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from_ = arg.substr(strlen(FROM_ARG));
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} else if (arg.find(END_ARG) == 0) {
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null_to_ = false;
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to_ = arg.substr(strlen(END_ARG));
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} else if (arg.find(HEX_ARG) == 0) {
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hex_ = true;
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} else {
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exec_state_ = LDBCommandExecuteResult::FAILED("Unknown argument." + arg);
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}
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}
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if (hex_) {
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if (!null_from_) {
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from_ = HexToString(from_);
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}
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if (!null_to_) {
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to_ = HexToString(to_);
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}
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}
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}
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void Compactor::Help(std::string& ret) {
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LDBCommand::Help(ret);
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ret.append("[--from=START KEY] ");
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ret.append("[--to=START KEY] ");
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ret.append("[--hex] ");
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}
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void Compactor::DoCommand() {
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leveldb::Slice* begin = NULL;
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leveldb::Slice* end = NULL;
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if (!null_from_) {
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begin = new leveldb::Slice(from_);
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}
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if (!null_to_) {
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end = new leveldb::Slice(to_);
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}
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db_->CompactRange(begin, end);
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exec_state_ = LDBCommandExecuteResult::SUCCEED("");
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delete begin;
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delete end;
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}
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const char* DBLoader::HEX_INPUT_ARG = "--input_hex";
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const char* DBLoader::CREATE_IF_MISSING_ARG = "--create_if_missing";
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const char* DBLoader::DISABLE_WAL_ARG = "--disable_wal";
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static const char* delim = " ==> ";
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DBLoader::DBLoader(std::string& db_name, std::vector<std::string>& args) :
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LDBCommand(db_name, args),
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hex_input_(false),
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create_if_missing_(false) {
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for (unsigned int i = 0; i < args.size(); i++) {
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std::string& arg = args.at(i);
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if (arg.find(HEX_INPUT_ARG) == 0) {
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hex_input_ = true;
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} else if (arg.find(CREATE_IF_MISSING_ARG) == 0) {
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create_if_missing_ = true;
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} else if (arg.find(DISABLE_WAL_ARG) == 0) {
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disable_wal_ = true;
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} else {
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exec_state_ = LDBCommandExecuteResult::FAILED("Unknown argument:" + arg);
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}
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}
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}
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void DBLoader::Help(std::string& ret) {
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LDBCommand::Help(ret);
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ret.append("[");
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ret.append(HEX_INPUT_ARG);
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ret.append("] [");
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ret.append(CREATE_IF_MISSING_ARG);
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ret.append("] [");
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ret.append(DISABLE_WAL_ARG);
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ret.append("]");
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}
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leveldb::Options DBLoader::PrepareOptionsForOpenDB() {
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leveldb::Options opt = LDBCommand::PrepareOptionsForOpenDB();
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opt.create_if_missing = create_if_missing_;
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return opt;
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}
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void DBLoader::DoCommand() {
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if (!db_) {
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return;
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}
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WriteOptions write_options;
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if (disable_wal_) {
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write_options.disableWAL = true;
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}
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int bad_lines = 0;
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std::string line;
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while (std::getline(std::cin, line, '\n')) {
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size_t pos = line.find(delim);
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if (pos != std::string::npos) {
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std::string key = line.substr(0, pos);
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std::string value = line.substr(pos + strlen(delim));
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if (hex_input_) {
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key = HexToString(key);
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value = HexToString(value);
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}
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db_->Put(write_options, Slice(key), Slice(value));
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} else if (0 == line.find("Keys in range:")) {
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// ignore this line
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} else if (0 == line.find("Created bg thread 0x")) {
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// ignore this line
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} else {
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bad_lines ++;
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}
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}
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if (bad_lines > 0) {
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std::cout << "Warning: " << bad_lines << " bad lines ignored." << std::endl;
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}
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}
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const char* DBDumper::MAX_KEYS_ARG = "--max_keys=";
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const char* DBDumper::COUNT_ONLY_ARG = "--count_only";
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const char* DBDumper::STATS_ARG = "--stats";
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const char* DBDumper::HEX_OUTPUT_ARG = "--output_hex";
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DBDumper::DBDumper(std::string& db_name, std::vector<std::string>& args) :
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LDBCommand(db_name, args),
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null_from_(true),
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null_to_(true),
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max_keys_(-1),
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count_only_(false),
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print_stats_(false),
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hex_(false),
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hex_output_(false) {
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for (unsigned int i = 0; i < args.size(); i++) {
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std::string& arg = args.at(i);
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if (arg.find(FROM_ARG) == 0) {
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null_from_ = false;
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from_ = arg.substr(strlen(FROM_ARG));
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} else if (arg.find(END_ARG) == 0) {
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null_to_ = false;
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to_ = arg.substr(strlen(END_ARG));
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} else if (arg.find(HEX_ARG) == 0) {
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hex_ = true;
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} else if (arg.find(MAX_KEYS_ARG) == 0) {
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max_keys_ = atoi(arg.substr(strlen(MAX_KEYS_ARG)).c_str());
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} else if (arg.find(STATS_ARG) == 0) {
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print_stats_ = true;
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} else if (arg.find(COUNT_ONLY_ARG) == 0) {
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count_only_ = true;
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} else if (arg.find(HEX_OUTPUT_ARG) == 0) {
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hex_output_ = true;
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} else {
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exec_state_ = LDBCommandExecuteResult::FAILED("Unknown argument:" + arg);
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}
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}
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if (hex_) {
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if (!null_from_) {
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from_ = HexToString(from_);
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}
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if (!null_to_) {
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to_ = HexToString(to_);
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}
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}
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}
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void DBDumper::Help(std::string& ret) {
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LDBCommand::Help(ret);
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ret.append("[--from=START KEY] ");
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ret.append("[--to=END Key] ");
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ret.append("[--hex] ");
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ret.append("[--output_hex] ");
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ret.append("[--max_keys=NUM] ");
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ret.append("[--count_only] ");
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ret.append("[--stats] ");
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}
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void DBDumper::DoCommand() {
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if (!db_) {
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return;
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}
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// Parse command line args
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uint64_t count = 0;
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if (print_stats_) {
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std::string stats;
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if (db_->GetProperty("leveldb.stats", &stats)) {
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fprintf(stdout, "%s\n", stats.c_str());
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}
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}
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// Setup key iterator
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leveldb::Iterator* iter = db_->NewIterator(leveldb::ReadOptions());
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leveldb::Status st = iter->status();
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if (!st.ok()) {
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exec_state_ = LDBCommandExecuteResult::FAILED("Iterator error."
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+ st.ToString());
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}
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if (!null_from_) {
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iter->Seek(from_);
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} else {
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iter->SeekToFirst();
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}
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int max_keys = max_keys_;
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for (; iter->Valid(); iter->Next()) {
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// If end marker was specified, we stop before it
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if (!null_to_ && (iter->key().ToString() >= to_))
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break;
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// Terminate if maximum number of keys have been dumped
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if (max_keys == 0)
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break;
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if (max_keys > 0) {
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--max_keys;
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}
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++count;
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if (!count_only_) {
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if (hex_output_) {
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std::string str = iter->key().ToString();
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for (unsigned int i = 0; i < str.length(); ++i) {
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fprintf(stdout, "%02X", (unsigned char)str[i]);
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}
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fprintf(stdout, delim);
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str = iter->value().ToString();
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for (unsigned int i = 0; i < str.length(); ++i) {
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fprintf(stdout, "%02X", (unsigned char)str[i]);
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}
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fprintf(stdout, "\n");
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} else {
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fprintf(stdout, "%s%s%s\n", iter->key().ToString().c_str(),
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delim,
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iter->value().ToString().c_str());
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}
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}
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}
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fprintf(stdout, "Keys in range: %lld\n", (long long) count);
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// Clean up
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delete iter;
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}
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const char* ReduceDBLevels::NEW_LEVLES_ARG = "--new_levels=";
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const char* ReduceDBLevels::PRINT_OLD_LEVELS_ARG = "--print_old_levels";
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ReduceDBLevels::ReduceDBLevels(std::string& db_name,
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std::vector<std::string>& args)
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: LDBCommand(db_name, args),
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old_levels_(1 << 16),
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new_levels_(-1),
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print_old_levels_(false) {
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for (unsigned int i = 0; i < args.size(); i++) {
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std::string& arg = args.at(i);
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if (arg.find(NEW_LEVLES_ARG) == 0) {
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new_levels_ = atoi(arg.substr(strlen(NEW_LEVLES_ARG)).c_str());
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} else if (arg.find(PRINT_OLD_LEVELS_ARG) == 0) {
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print_old_levels_ = true;
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} else {
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exec_state_ = LDBCommandExecuteResult::FAILED(
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"Unknown argument." + arg);
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}
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}
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if(new_levels_ <= 0) {
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exec_state_ = LDBCommandExecuteResult::FAILED(
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" Use --new_levels to specify a new level number\n");
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}
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}
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std::vector<std::string> ReduceDBLevels::PrepareArgs(int new_levels,
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bool print_old_level) {
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std::vector<std::string> ret;
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char arg[100];
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sprintf(arg, "%s%d", NEW_LEVLES_ARG, new_levels);
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ret.push_back(arg);
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if(print_old_level) {
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sprintf(arg, "%s", PRINT_OLD_LEVELS_ARG);
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ret.push_back(arg);
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}
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return ret;
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}
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void ReduceDBLevels::Help(std::string& msg) {
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LDBCommand::Help(msg);
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msg.append("[--new_levels=New number of levels] ");
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msg.append("[--print_old_levels] ");
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msg.append("[--compression=none|snappy|zlib|bzip2] ");
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msg.append("[--file_size= per-file size] ");
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}
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leveldb::Options ReduceDBLevels::PrepareOptionsForOpenDB() {
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leveldb::Options opt = LDBCommand::PrepareOptionsForOpenDB();
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opt.num_levels = old_levels_;
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// Disable size compaction
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opt.max_bytes_for_level_base = 1UL << 50;
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opt.max_bytes_for_level_multiplier = 1;
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opt.max_mem_compaction_level = 0;
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return opt;
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}
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Status ReduceDBLevels::GetOldNumOfLevels(leveldb::Options& opt, int* levels) {
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TableCache* tc = new TableCache(db_path_, &opt, 10);
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const InternalKeyComparator* cmp = new InternalKeyComparator(
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opt.comparator);
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VersionSet* versions = new VersionSet(db_path_, &opt,
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tc, cmp);
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// We rely the VersionSet::Recover to tell us the internal data structures
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// in the db. And the Recover() should never do any change
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// (like LogAndApply) to the manifest file.
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Status st = versions->Recover();
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if (!st.ok()) {
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return st;
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}
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int max = -1;
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for (int i = 0; i < versions->NumberLevels(); i++) {
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if (versions->NumLevelFiles(i)) {
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max = i;
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}
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}
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*levels = max + 1;
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delete versions;
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return st;
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}
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void ReduceDBLevels::DoCommand() {
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if (new_levels_ <= 1) {
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exec_state_ = LDBCommandExecuteResult::FAILED(
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"Invalid number of levels.\n");
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return;
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}
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leveldb::Status st;
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leveldb::Options opt = PrepareOptionsForOpenDB();
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int old_level_num = -1;
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st = GetOldNumOfLevels(opt, &old_level_num);
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if (!st.ok()) {
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exec_state_ = LDBCommandExecuteResult::FAILED(st.ToString());
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return;
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}
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if (print_old_levels_) {
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fprintf(stdout, "The old number of levels in use is %d\n", old_level_num);
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}
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|
if (old_level_num <= new_levels_) {
|
|
return;
|
|
}
|
|
|
|
old_levels_ = old_level_num;
|
|
|
|
OpenDB();
|
|
if (!db_) {
|
|
return;
|
|
}
|
|
// Compact the whole DB to put all files to the highest level.
|
|
fprintf(stdout, "Compacting the db...\n");
|
|
db_->CompactRange(NULL, NULL);
|
|
CloseDB();
|
|
|
|
TableCache* tc = new TableCache(db_path_, &opt, 10);
|
|
const InternalKeyComparator* cmp = new InternalKeyComparator(
|
|
opt.comparator);
|
|
VersionSet* versions = new VersionSet(db_path_, &opt,
|
|
tc, cmp);
|
|
// We rely the VersionSet::Recover to tell us the internal data structures
|
|
// in the db. And the Recover() should never do any change (like LogAndApply)
|
|
// to the manifest file.
|
|
st = versions->Recover();
|
|
if (!st.ok()) {
|
|
exec_state_ = LDBCommandExecuteResult::FAILED(st.ToString());
|
|
return;
|
|
}
|
|
|
|
port::Mutex mu;
|
|
mu.Lock();
|
|
st = versions->ReduceNumberOfLevels(new_levels_, &mu);
|
|
mu.Unlock();
|
|
|
|
if (!st.ok()) {
|
|
exec_state_ = LDBCommandExecuteResult::FAILED(st.ToString());
|
|
return;
|
|
}
|
|
}
|
|
|
|
const char* WALDumper::WAL_FILE_ARG = "--walfile=";
|
|
WALDumper::WALDumper(std::vector<std::string>& args) :
|
|
LDBCommand(args), print_header_(false) {
|
|
wal_file_.clear();
|
|
for (unsigned int i = 0; i < args.size(); i++) {
|
|
std::string& arg = args.at(i);
|
|
if (arg.find("--header") == 0) {
|
|
print_header_ = true;
|
|
} else if (arg.find(WAL_FILE_ARG) == 0) {
|
|
wal_file_ = arg.substr(strlen(WAL_FILE_ARG));
|
|
} else {
|
|
exec_state_ = LDBCommandExecuteResult::FAILED("Unknown argument " + arg);
|
|
}
|
|
}
|
|
if (wal_file_.empty()) {
|
|
exec_state_ = LDBCommandExecuteResult::FAILED("Argument --walfile reqd.");
|
|
}
|
|
}
|
|
|
|
void WALDumper::Help(std::string& ret) {
|
|
ret.append("--walfile write_ahead_log ");
|
|
ret.append("[--header print's a header] ");
|
|
}
|
|
|
|
void WALDumper::DoCommand() {
|
|
struct StdErrReporter : public log::Reader::Reporter {
|
|
virtual void Corruption(size_t bytes, const Status& s) {
|
|
std::cerr<<"Corruption detected in log file "<<s.ToString()<<"\n";
|
|
}
|
|
};
|
|
|
|
SequentialFile* file;
|
|
Env* env_ = Env::Default();
|
|
Status status = env_->NewSequentialFile(wal_file_, &file);
|
|
if (!status.ok()) {
|
|
exec_state_ = LDBCommandExecuteResult::FAILED("Failed to open WAL file " +
|
|
status.ToString());
|
|
} else {
|
|
StdErrReporter reporter;
|
|
log::Reader reader(file, &reporter, true, 0);
|
|
std::string scratch;
|
|
WriteBatch batch;
|
|
Slice record;
|
|
std::stringstream row;
|
|
if (print_header_) {
|
|
std::cout<<"Sequence,Count,ByteSize,Physical Offset\n";
|
|
}
|
|
while(reader.ReadRecord(&record, &scratch)) {
|
|
row.str("");
|
|
if (record.size() < 12) {
|
|
reporter.Corruption(
|
|
record.size(), Status::Corruption("log record too small"));
|
|
} else {
|
|
WriteBatchInternal::SetContents(&batch, record);
|
|
row<<WriteBatchInternal::Sequence(&batch)<<",";
|
|
row<<WriteBatchInternal::Count(&batch)<<",";
|
|
row<<WriteBatchInternal::ByteSize(&batch)<<",";
|
|
row<<reader.LastRecordOffset()<<"\n";
|
|
}
|
|
std::cout<<row.str();
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|