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Update HISTORY.md #239

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Nov 13, 2022
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Update HISTORY.md #239

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25 changes: 25 additions & 0 deletions HISTORY.md
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# Speedb Change Log

## Blueberry 2.1.0 (10/26/2022)
## New Features
* Added new Paired bloom filter that reduces false positive rate with the same performance and memory. In some configurations, the memory consumption is even reduced by up to 30%.
Note: Paired bloom filter is recommended to use when the number of bits per key is larger than 10. (#54)
* Added Plugin Tests to builds (#143)

## Enhancements
* The default value for the number of compaction threads has changed to 8 (#194)
* An infrastructure addition for a future feature: added API to retrieve the amount of immutable memory that can be freed. (#113)
* cmake: allow running the tests in parallel like in the Makefile (#103)
* build: fix the java test target dependencies (#129)
* flush_job: do not roll back memtable flush on CF drop and DB shutdown (#127)
* When background purges are used, set their priority to low instead of high, (#151)
* Added db_bench option to change the parameter: avoid_unnecessary_blocking_io (#184)
* Allow construction of Filter Policy from uri to the tools (#83)

## Miscellaneous
* Remove the GPL as an alternative license (#119)
* Fix shell tab-completions in makefile (#148)
* Added Speedb change-log to the HISTORY.md file (#189)
* makefile: rework the dependency graph for faster test runs startup (#175)
* Change the name of the output artifacts to Speedb (#66)


## Apricot 2.0.0 (08/04/2022)
## New Features
* Added a new hash based memtable that supports concurrent reads and writes
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