提交 9afa20cf 编辑于 作者: Siying Dong's avatar Siying Dong 提交者: Facebook Github Bot
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Increase build version and HISTORY.md for releasing 5.2

Summary:
Also clean up HISTORY.md a little bit.
Closes https://github.com/facebook/rocksdb/pull/1854

Differential Revision: D4539556

Pulled By: siying

fbshipit-source-id: 567391e
上级 a5adda06
# Rocksdb Change Log
## Unreleased
## 5.2.0 (02/08/2017)
### Public API Change
* Support dynamically change `delete_obsolete_files_period_micros` option via SetDBOptions().
* Added EventListener::OnExternalFileIngested which will be called when IngestExternalFile() add a file successfully.
* BackupEngine::Open and BackupEngineReadOnly::Open now always return error statuses matching those of the backup Env.
* Added new overloaded function GetApproximateSizes that allows to specify if memtable stats should be computed only without computing SST files' stats approximations.
* NewLRUCache() will determine number of shard bits automatically based on capacity, if the user doesn't pass one. This also impacts the default block cache when the user doesn't explict provide one.
* Change the default of delayed slowdown value to 16MB/s and further increase the L0 stop condition to 36 files.
* Added new function GetApproximateMemTableStats that approximates both number of records and size of memtables.
* (Experimental) Two-level indexing that partition the index and creates a 2nd level index on the partitions. The feature can be enabled by setting kTwoLevelIndexSearch as IndexType and configuring index_per_partition.
### New Features
* Added new overloaded function GetApproximateSizes that allows to specify if memtable stats should be computed only without computing SST files' stats approximations.
* Added new function GetApproximateMemTableStats that approximates both number of records and size of memtables.
### Bug Fixes
* RangeSync() should work if ROCKSDB_FALLOCATE_PRESENT is not set
* Fix wrong results in a data race case in Get()
* Some fixes related to 2PC.
## 5.1.0 (01/13/2017)
* Support dynamically change `delete_obsolete_files_period_micros` option via SetDBOptions().
* Added EventListener::OnExternalFileIngested which will be called when IngestExternalFile() add a file successfully.
* BackupEngine::Open and BackupEngineReadOnly::Open now always return error statuses matching those of the backup Env.
### Bug Fixes
* Fix the bug that if 2PC is enabled, checkpoints may loss some recent transactions.
* When file copying is needed when creating checkpoints or bulk loading files, fsync the file after the file copying.
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......@@ -5,7 +5,7 @@
#pragma once
#define ROCKSDB_MAJOR 5
#define ROCKSDB_MINOR 0
#define ROCKSDB_MINOR 2
#define ROCKSDB_PATCH 0
// Do not use these. We made the mistake of declaring macros starting with
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