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RocksDB 4.0
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@IslamAbdelRahman IslamAbdelRahman released this 21 Oct 04:13
· 14 commits to 4.0.fb since this release
v4.0
a9a6a2f

New Features

  • Added support for transactions. See include/rocksdb/utilities/transaction.h for more info.
  • DB::GetProperty() now accepts "rocksdb.aggregated-table-properties" and "rocksdb.aggregated-table-properties-at-levelN", in which case it returns aggregated table properties of the target column family, or the aggregated table properties of the specified level N if the "at-level" version is used.
  • Add compression option kZSTDNotFinalCompression for people to experiment ZSTD although its format is not finalized.
  • We removed the need for LATEST_BACKUP file in BackupEngine. We still keep writing it when we create new backups (because of backward compatibility), but we don't read it anymore.

Public API Changes

  • Removed class Env::RandomRWFile and Env::NewRandomRWFile().
  • Renamed DBOptions.num_subcompactions to DBOptions.max_subcompactions to make the name better match the actual functionality of the option.
  • Added Equal() method to the Comparator interface that can optionally be overwritten in cases where equality comparisons can be done more efficiently than three-way comparisons.
  • Previous 'experimental' OptimisticTransaction class has been replaced by Transaction class.
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