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Update HISTORY.md with IO fencing error code (#7402)

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Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/7402

Reviewed By: pdillinger

Differential Revision: D23761689

Pulled By: anand1976

fbshipit-source-id: 59e10f0aaa80f6c0f5a46dc99467138c4cee0511
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anand76 4 years ago committed by Facebook GitHub Bot
parent 93719fc953
commit b9750c7c3c
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HISTORY.md
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@ -39,6 +39,7 @@
* Added file_checksum and file_checksum_func_name to TableFileCreationInfo, which can pass the table file checksum information through the OnTableFileCreated callback during flush and compaction. * Added file_checksum and file_checksum_func_name to TableFileCreationInfo, which can pass the table file checksum information through the OnTableFileCreated callback during flush and compaction.
* A warning is added to `DB::DeleteFile()` API describing its known problems and deprecation plan. * A warning is added to `DB::DeleteFile()` API describing its known problems and deprecation plan.
* Add a new stats level, i.e. StatsLevel::kExceptTickers (PR7329) to exclude tickers even if application passes a non-null Statistics object. * Add a new stats level, i.e. StatsLevel::kExceptTickers (PR7329) to exclude tickers even if application passes a non-null Statistics object.
* Added a new status code IOStatus::IOFenced() for the Env/FileSystem to indicate that writes from this instance are fenced off. Like any other background error, this error is returned to the user in Put/Merge/Delete/Flush calls and can be checked using Status::IsIOFenced().
### Behavior Changes ### Behavior Changes
* File abstraction `FSRandomAccessFile.Prefetch()` default return status is changed from `OK` to `NotSupported`. If the user inherited file doesn't implement prefetch, RocksDB will create internal prefetch buffer to improve read performance. * File abstraction `FSRandomAccessFile.Prefetch()` default return status is changed from `OK` to `NotSupported`. If the user inherited file doesn't implement prefetch, RocksDB will create internal prefetch buffer to improve read performance.

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