Log shipping data replication with parallel log writing and log shipping at the primary site
    1.
    发明授权
    Log shipping data replication with parallel log writing and log shipping at the primary site 失效
    在主站点上记录并行日志写入和日志传送的日志传送数据复制

    公开(公告)号:US07529783B2

    公开(公告)日:2009-05-05

    申请号:US11021002

    申请日:2004-12-22

    IPC分类号: G06F17/30

    摘要: A log-shipping data replication system employs a primary server coupled to a standby server. In operation, the primary server concurrently flushes log data at the primary server and transmits the same log data from the primary server to the standby server. The primary server further transmits at least one buffer flush boundary indication to the standby server indicating the flushing status of the log data at the primary server. The standby server processes the log data as a function of receiving the log data from the primary server, and/or receiving the at least one buffer flush boundary indication from the primary server.

    摘要翻译: 日志传送数据复制系统使用耦合到备用服务器的主服务器。 在运行时,主服务器同时刷新主服务器上的日志数据,并将相同的日志数据从主服务器发送到备用服务器。 主服务器还向备用服务器发送至少一个缓冲区清除边界指示,指示主服务器上日志数据的刷新状态。 备用服务器将日志数据作为从主服务器接收日志数据和/或从主服务器接收至少一个缓冲区清除边界指示的功能。

    Consistent reintegration of a failed primary instance
    2.
    发明授权
    Consistent reintegration of a failed primary instance 失效
    失败的主要实例的一致重新整合

    公开(公告)号:US07499954B2

    公开(公告)日:2009-03-03

    申请号:US10978548

    申请日:2004-11-01

    IPC分类号: G06F17/30

    摘要: A method and system are provided for providing a consistent reintegration of a failed primary instance as a new secondary instance with implementation of truncation of log records. Upon failure of a primary instance, a secondary instance may be reassigned as the new primary instance. Prior to reintegration, any portion of the database log of the failed primary that is after the log position of the new primary instance may be truncated, followed by a comparison of the log positions of both the new primary instance and the new secondary instance. In limited circumstances, the truncation of the log data generated by the failed primary instance after the point of failure is possible, and supports reintegration of the failed primary as a new secondary instance with limited overhead.

    摘要翻译: 提供了一种方法和系统,用于将失败的主实例作为新的辅助实例提供一致的重新集成,并实现截断日志记录。 在主实例失败时,可以将辅助实例重新分配为新的主实例。 在重新集成之前,可能会截断新主要实例的日志位置之后的失败主数据库的任何部分,然后比较新的主实例和新的辅助实例的日志位置。 在有限的情况下,在故障点之后由失败的主实例生成的日志数据的截断是可能的,并且支持将故障主要重新集成为具有有限开销的新辅助实例。

    Method and Apparatus for Providing Efficient Space Utilization of WORM Media While Maintaining Transactional Consistency
    3.
    发明申请
    Method and Apparatus for Providing Efficient Space Utilization of WORM Media While Maintaining Transactional Consistency 审中-公开
    在维护事务一致性的同时提供WORM媒体高效空间利用的方法和装置

    公开(公告)号:US20080040399A1

    公开(公告)日:2008-02-14

    申请号:US11461703

    申请日:2006-08-01

    IPC分类号: G06F17/30

    CPC分类号: G06F16/2219

    摘要: A method and apparatus for providing efficient space utilization of WORM media while maintaining transactional consistency are disclosed. In response to a transaction, a binary large object (BLOB) associated with the transaction is stored on a staging area of a non-volatile storage medium. A determination is then made as to whether or not a rollback operation needs to be performed on the transaction. If a rollback operation needs not to be performed on the transaction, the BLOB is migrated from the staging area of the non-volatile storage medium to a WORM medium after the transaction has been committed.

    摘要翻译: 公开了一种用于在保持事务一致性的同时提供WORM介质的有效空间利用的方法和装置。 响应于事务,与事务相关联的二进制大对象(BLOB)被存储在非易失性存储介质的暂存区域上。 然后确定是否需要对该交易执行回滚操作。 如果不需要对事务执行回滚操作,则在事务提交之后,BLOB将从非易失性存储介质的暂存区域迁移到WORM介质。