release 4.9 update version and history
Summary: update version and history Test Plan: N/A Reviewers: yiwu, sdong, IslamAbdelRahman, andrewkr Reviewed By: andrewkr Subscribers: andrewkr, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D59421
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HISTORY.md
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HISTORY.md
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# Unreleased
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### Public API Change
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* Deprecate BlockBaseTableOptions.hash_index_allow_collision=false
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* Deprecate options builder (GetOptions()).
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# Rocksdb Change Log
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# Rocksdb Change Log
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## Unreleased
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## Unreleased
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## 4.9.0 (6/9/2016)
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### Public API changes
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### Public API changes
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* Add bottommost_compression option, This option can be used to set a specific compression algorithm for the bottommost level (Last level containing files in the DB).
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* Add bottommost_compression option, This option can be used to set a specific compression algorithm for the bottommost level (Last level containing files in the DB).
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* Introduce CompactionJobInfo::compression, This field state the compression algorithm used to generate the output files of the compaction.
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* Introduce CompactionJobInfo::compression, This field state the compression algorithm used to generate the output files of the compaction.
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* Deprecate BlockBaseTableOptions.hash_index_allow_collision=false
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* Deprecate BlockBaseTableOptions.hash_index_allow_collision=false
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* Deprecate options builder (GetOptions()).
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### New Features
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* Introduce NewSimCache() in rocksdb/utilities/sim_cache.h. This function creates a block cache that is able to give simulation results (mainly hit rate) of simulating block behavior with a configurable cache size.
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## 4.8.0 (5/2/2016)
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## 4.8.0 (5/2/2016)
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### Public API Change
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### Public API Change
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#pragma once
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#pragma once
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#define ROCKSDB_MAJOR 4
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#define ROCKSDB_MAJOR 4
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#define ROCKSDB_MINOR 8
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#define ROCKSDB_MINOR 9
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#define ROCKSDB_PATCH 0
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#define ROCKSDB_PATCH 0
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// Do not use these. We made the mistake of declaring macros starting with
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// Do not use these. We made the mistake of declaring macros starting with
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