mirror of
https://github.com/facebook/rocksdb.git
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5665e5e285
Summary: As a preparation to support updating some options dynamically, I'd like to first introduce ImmutableOptions, which is a subset of Options that cannot be changed during the course of a DB lifetime without restart. ColumnFamily will keep both Options and ImmutableOptions. Any component below ColumnFamily should only take ImmutableOptions in their constructor. Other options should be taken from APIs, which will be allowed to adjust dynamically. I am yet to make changes to memtable and other related classes to take ImmutableOptions in their ctor. That can be done in a seprate diff as this one is already pretty big. Test Plan: make all check Reviewers: yhchiang, igor, sdong Reviewed By: sdong Subscribers: leveldb, dhruba Differential Revision: https://reviews.facebook.net/D22545
119 lines
4.6 KiB
C++
119 lines
4.6 KiB
C++
// Copyright (c) 2011 The LevelDB Authors. 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. See the AUTHORS file for names of contributors.
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#ifndef ROCKSDB_LITE
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#include "table/adaptive_table_factory.h"
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#include "table/format.h"
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namespace rocksdb {
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AdaptiveTableFactory::AdaptiveTableFactory(
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std::shared_ptr<TableFactory> table_factory_to_write,
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std::shared_ptr<TableFactory> block_based_table_factory,
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std::shared_ptr<TableFactory> plain_table_factory,
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std::shared_ptr<TableFactory> cuckoo_table_factory)
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: table_factory_to_write_(table_factory_to_write),
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block_based_table_factory_(block_based_table_factory),
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plain_table_factory_(plain_table_factory),
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cuckoo_table_factory_(cuckoo_table_factory) {
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if (!table_factory_to_write_) {
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table_factory_to_write_ = block_based_table_factory_;
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}
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if (!plain_table_factory_) {
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plain_table_factory_.reset(NewPlainTableFactory());
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}
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if (!block_based_table_factory_) {
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block_based_table_factory_.reset(NewBlockBasedTableFactory());
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}
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if (!cuckoo_table_factory_) {
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cuckoo_table_factory_.reset(NewCuckooTableFactory());
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}
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}
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extern const uint64_t kPlainTableMagicNumber;
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extern const uint64_t kLegacyPlainTableMagicNumber;
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extern const uint64_t kBlockBasedTableMagicNumber;
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extern const uint64_t kLegacyBlockBasedTableMagicNumber;
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extern const uint64_t kCuckooTableMagicNumber;
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Status AdaptiveTableFactory::NewTableReader(
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const ImmutableCFOptions& ioptions, const EnvOptions& env_options,
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const InternalKeyComparator& icomp, unique_ptr<RandomAccessFile>&& file,
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uint64_t file_size, unique_ptr<TableReader>* table) const {
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Footer footer;
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auto s = ReadFooterFromFile(file.get(), file_size, &footer);
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if (!s.ok()) {
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return s;
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}
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if (footer.table_magic_number() == kPlainTableMagicNumber ||
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footer.table_magic_number() == kLegacyPlainTableMagicNumber) {
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return plain_table_factory_->NewTableReader(
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ioptions, env_options, icomp, std::move(file), file_size, table);
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} else if (footer.table_magic_number() == kBlockBasedTableMagicNumber ||
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footer.table_magic_number() == kLegacyBlockBasedTableMagicNumber) {
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return block_based_table_factory_->NewTableReader(
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ioptions, env_options, icomp, std::move(file), file_size, table);
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} else if (footer.table_magic_number() == kCuckooTableMagicNumber) {
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return cuckoo_table_factory_->NewTableReader(
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ioptions, env_options, icomp, std::move(file), file_size, table);
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} else {
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return Status::NotSupported("Unidentified table format");
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}
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}
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TableBuilder* AdaptiveTableFactory::NewTableBuilder(
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const ImmutableCFOptions& ioptions,
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const InternalKeyComparator& internal_comparator,
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WritableFile* file, const CompressionType compression_type,
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const CompressionOptions& compression_opts) const {
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return table_factory_to_write_->NewTableBuilder(
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ioptions, internal_comparator, file, compression_type, compression_opts);
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}
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std::string AdaptiveTableFactory::GetPrintableTableOptions() const {
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std::string ret;
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ret.reserve(20000);
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const int kBufferSize = 200;
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char buffer[kBufferSize];
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if (!table_factory_to_write_) {
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snprintf(buffer, kBufferSize, " write factory (%s) options:\n%s\n",
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table_factory_to_write_->Name(),
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table_factory_to_write_->GetPrintableTableOptions().c_str());
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ret.append(buffer);
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}
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if (!plain_table_factory_) {
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snprintf(buffer, kBufferSize, " %s options:\n%s\n",
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plain_table_factory_->Name(),
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plain_table_factory_->GetPrintableTableOptions().c_str());
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ret.append(buffer);
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}
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if (!block_based_table_factory_) {
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snprintf(buffer, kBufferSize, " %s options:\n%s\n",
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block_based_table_factory_->Name(),
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block_based_table_factory_->GetPrintableTableOptions().c_str());
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ret.append(buffer);
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}
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if (!cuckoo_table_factory_) {
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snprintf(buffer, kBufferSize, " %s options:\n%s\n",
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cuckoo_table_factory_->Name(),
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cuckoo_table_factory_->GetPrintableTableOptions().c_str());
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ret.append(buffer);
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}
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return ret;
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}
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extern TableFactory* NewAdaptiveTableFactory(
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std::shared_ptr<TableFactory> table_factory_to_write,
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std::shared_ptr<TableFactory> block_based_table_factory,
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std::shared_ptr<TableFactory> plain_table_factory,
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std::shared_ptr<TableFactory> cuckoo_table_factory) {
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return new AdaptiveTableFactory(table_factory_to_write,
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block_based_table_factory, plain_table_factory, cuckoo_table_factory);
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}
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} // namespace rocksdb
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#endif // ROCKSDB_LITE
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