-
公开(公告)号:US07243088B2
公开(公告)日:2007-07-10
申请号:US10636361
申请日:2003-08-06
CPC分类号: G06F17/30312 , G06F9/466 , G06F17/30356 , G06F17/30377 , Y10S707/99931
摘要: A two copy versioning scheme is proposed. The scheme provides efficient implementation for a high read load database and eliminates read dependencies. The versioning scheme provides efficient implementation for transactions executing under ANSI READ COMMITTED isolation, and is extensible to serializable isolation. The two-copy versioning scheme is garbage free meaning that all versions of data records are used during execution and is adapted to index scanning operations. A “deferred delete” scheme allows read transactions to complete data deallocation operations. Statements that require “snapshots” are efficiently supported.
摘要翻译: 提出了一种双重版本控制方案。 该方案为高读取数据库提供了有效的实现,并消除了读取依赖关系。 版本控制方案为在ANSI READ COMMITTED隔离下执行的事务提供了有效的实现,并且可扩展到可序列化隔离。 双副本版本控制方案是无意义的,意味着在执行期间使用所有版本的数据记录,并适应于索引扫描操作。 “延迟删除”方案允许读取事务完成数据解除分配操作。 有效地支持需要“快照”的语句。
-
公开(公告)号:US08010497B2
公开(公告)日:2011-08-30
申请号:US11757224
申请日:2007-06-01
IPC分类号: G06F7/00
CPC分类号: G06F17/30312 , G06F9/466 , G06F17/30356 , G06F17/30377 , Y10S707/99931
摘要: A two copy versioning scheme is proposed. The scheme provides efficient implementation for a high read load database and eliminates read dependencies. The versioning scheme provides efficient implementation for transactions executing under ANSI READ COMMITTED isolation, and is extensible to serializable isolation. The two-copy versioning scheme is garbage free meaning that all versions of data records are used during execution and is adapted to index scanning operations. A “deferred delete” scheme allows read transactions to complete data deallocation operations. Statements that require “snapshots” are efficiently supported.
摘要翻译: 提出了一种双重版本控制方案。 该方案为高读取数据库提供了有效的实现,并消除了读取依赖关系。 版本控制方案为在ANSI READ COMMITTED隔离下执行的事务提供了有效的实现,并且可扩展到可序列化隔离。 双副本版本控制方案是无意义的,意味着在执行期间使用所有版本的数据记录,并适应于索引扫描操作。 “延迟删除”方案允许读取事务完成数据解除分配操作。 有效地支持需要“快照”的语句。
-