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Add release notes for PinnableSlice

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Summary: Closes https://github.com/facebook/rocksdb/pull/2037

Differential Revision: D4822085

Pulled By: maysamyabandeh

fbshipit-source-id: 9d5a986
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Maysam Yabandeh 2017-04-03 14:58:10 -07:00 committed by Facebook Github Bot
parent 0537f515c2
commit a1c469d719
1 changed files with 3 additions and 0 deletions
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HISTORY.md
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@ -3,6 +3,9 @@
### Public API Change ### Public API Change
* Support dynamically change `stats_dump_period_sec` option via SetDBOptions(). * Support dynamically change `stats_dump_period_sec` option via SetDBOptions().
* Added ReadOptions::max_skippable_internal_keys to set a threshold to fail a request as incomplete when too many keys are being skipped when using iterators. * Added ReadOptions::max_skippable_internal_keys to set a threshold to fail a request as incomplete when too many keys are being skipped when using iterators.
* DB::Get in place of std::string accepts PinnableSlice, which avoids the extra memcpy of value to std::string in most of cases.
* PinnableSlice releases the pinned resources that contain the value when it is destructed or when ::Reset() is called on it.
* The old API that accepts std::string, although discouraged, is still supported.
### New Features ### New Features
* Memtable flush can be avoided during checkpoint creation if total log file size is smaller than a threshold specified by the user. * Memtable flush can be avoided during checkpoint creation if total log file size is smaller than a threshold specified by the user.