31ee4bf240
Summary: When there are many range deletions in a range, we want to trigger manual compaction on this range to reclaim disk space as soon as possible and speed up read. After this change, we can collect informations of range deletions and store them into user properties which can guide our manual compaction. Closes https://github.com/facebook/rocksdb/pull/3695 Differential Revision: D7570322 Pulled By: ajkr fbshipit-source-id: c358fa43b0aac6cc954d2eadc7d3bd8015373369
57 lines
1.4 KiB
C++
57 lines
1.4 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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#ifndef STORAGE_ROCKSDB_INCLUDE_TYPES_H_
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#define STORAGE_ROCKSDB_INCLUDE_TYPES_H_
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#include <stdint.h>
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#include "rocksdb/slice.h"
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namespace rocksdb {
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// Define all public custom types here.
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// Represents a sequence number in a WAL file.
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typedef uint64_t SequenceNumber;
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// User-oriented representation of internal key types.
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enum EntryType {
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kEntryPut,
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kEntryDelete,
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kEntrySingleDelete,
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kEntryMerge,
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kEntryRangeDeletion,
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kEntryOther,
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};
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// <user key, sequence number, and entry type> tuple.
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struct FullKey {
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Slice user_key;
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SequenceNumber sequence;
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EntryType type;
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FullKey()
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: sequence(0)
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{} // Intentionally left uninitialized (for speed)
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FullKey(const Slice& u, const SequenceNumber& seq, EntryType t)
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: user_key(u), sequence(seq), type(t) { }
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std::string DebugString(bool hex = false) const;
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void clear() {
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user_key.clear();
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sequence = 0;
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type = EntryType::kEntryPut;
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}
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};
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// Parse slice representing internal key to FullKey
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// Parsed FullKey is valid for as long as the memory pointed to by
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// internal_key is alive.
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bool ParseFullKey(const Slice& internal_key, FullKey* result);
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} // namespace rocksdb
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#endif // STORAGE_ROCKSDB_INCLUDE_TYPES_H_
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