fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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294 lines
8.2 KiB
294 lines
8.2 KiB
// 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 "util/ldb_cmd.h"
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namespace leveldb {
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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 (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* 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), null_from_(true), null_to_(true), hex_(false),
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count_only_(false), print_stats_(false), max_keys_(-1),
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hex_output_(false) {
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for (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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// 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 (int i = 0; i < str.length(); ++i) {
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fprintf(stdout, "%X", str[i]);
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}
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fprintf(stdout, " ==> ");
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str = iter->value().ToString();
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for (int i = 0; i < str.length(); ++i) {
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fprintf(stdout, "%X", 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\n", iter->key().ToString().c_str(),
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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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new_levels_(-1),
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print_old_levels_(false) {
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for (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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}
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leveldb::Options ReduceDBLevels::PrepareOptionsForOpenDB() {
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leveldb::Options opt = LDBCommand::PrepareOptionsForOpenDB();
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// Set to a big value to make sure we can open the db
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opt.num_levels = 1 << 16;
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return opt;
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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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if (print_old_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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st = versions->Recover();
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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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fprintf(stdout, "The old number of levels in use is %d\n", max + 1);
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delete versions;
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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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}
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// Compact the whole DB to put all files to the highest level.
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db_->CompactRange(NULL, NULL);
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CloseDB();
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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 (like LogAndApply)
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// to the manifest file.
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st = versions->Recover();
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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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port::Mutex mu;
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mu.Lock();
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st = versions->ReduceNumberOfLevels(new_levels_, &mu);
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mu.Unlock();
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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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}
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}
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