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RocksDB 4.0 发布,key-value 存储系统

[日期:2015-10-22] 来源:Linux社区  作者:Linux [字体: ]

RocksDB 4.0 发布下载,更新内容如下:

新特性

  • 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.

公共 API 变化

  • 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  • Previous 'experimental' OptimisticTransaction class has been replaced by Transaction class.

下载页面:RocksDB 4.0

RocksDB 是一个来自 facebook 的可嵌入式的支持持久化的 key-value 存储系统,也可作为 C/S 模式下的存储数据库,但主要目的还是嵌入式。RocksDB 基于 LevelDB 构建。关于 RocksDB 的性能说明

RocksDB

RocksDB 的详细介绍请点这里 
RocksDB 的下载地址请点这里

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