a084b26a5a
Summary: Closes https://github.com/facebook/rocksdb/pull/2025 Differential Revision: D4759957 Pulled By: siying fbshipit-source-id: 5b5b625
23 lines
1.3 KiB
Markdown
23 lines
1.3 KiB
Markdown
---
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title: RocksDB 5.2.1 Released!
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layout: post
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author: sdong
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category: blog
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---
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### Public API Change
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* 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.
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* Change the default of delayed slowdown value to 16MB/s and further increase the L0 stop condition to 36 files.
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### New Features
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* Added new overloaded function GetApproximateSizes that allows to specify if memtable stats should be computed only without computing SST files' stats approximations.
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* Added new function GetApproximateMemTableStats that approximates both number of records and size of memtables.
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* (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.
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### Bug Fixes
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* RangeSync() should work if ROCKSDB_FALLOCATE_PRESENT is not set
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* Fix wrong results in a data race case in Get()
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* Some fixes related to 2PC.
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* Fix several bugs in Direct I/O supports.
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* Fix a regression bug which can cause Seek() to miss some keys if the return key has been updated many times after the snapshot which is used by the iterator.
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