e1c468d16f
Summary: Right now VerifyChecksum() doesn't do read-ahead. In some use cases, users won't be able to achieve good performance. With this change, by default, RocksDB will do a default readahead, and users will be able to overwrite the readahead size by passing in a ReadOptions. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5713 Test Plan: Add a new unit test. Differential Revision: D16860874 fbshipit-source-id: 0cff0fe79ac855d3d068e6ccd770770854a68413
48 lines
1.3 KiB
C++
48 lines
1.3 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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#pragma once
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#ifndef ROCKSDB_LITE
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#include "rocksdb/iterator.h"
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#include "rocksdb/options.h"
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#include "rocksdb/slice.h"
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#include "rocksdb/table_properties.h"
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namespace rocksdb {
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// SstFileReader is used to read sst files that are generated by DB or
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// SstFileWriter.
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class SstFileReader {
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public:
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SstFileReader(const Options& options);
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~SstFileReader();
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// Prepares to read from the file located at "file_path".
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Status Open(const std::string& file_path);
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// Returns a new iterator over the table contents.
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// Most read options provide the same control as we read from DB.
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// If "snapshot" is nullptr, the iterator returns only the latest keys.
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Iterator* NewIterator(const ReadOptions& options);
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std::shared_ptr<const TableProperties> GetTableProperties() const;
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// Verifies whether there is corruption in this table.
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Status VerifyChecksum(const ReadOptions& /*read_options*/);
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Status VerifyChecksum() { return VerifyChecksum(ReadOptions()); }
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private:
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struct Rep;
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std::unique_ptr<Rep> rep_;
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};
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} // namespace rocksdb
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#endif // !ROCKSDB_LITE
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