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1. 发明授权

US5845292A System and method for restoring a distributed checkpointed database 失效
标题翻译：用于恢复分布式检查点数据库的系统和方法
公开(公告)号：US5845292A
公开(公告)日：1998-12-01
申请号：US766096
申请日：1996-12-16
申请人： Philip L. Bohannon , James Allen Parker , Rajeev Rastogi , Abraham Silberschatz
发明人： Philip L. Bohannon , James Allen Parker , Rajeev Rastogi , Abraham Silberschatz
IPC分类号： G06F17/30
CPC分类号： G06F11/1471 , G06F11/1469 , G06F2201/80 , Y10S707/99938 , Y10S707/99952 , Y10S707/99953
摘要： For use with a central database associated with a server of a network, the central database having distributed counterparts stored in volatile memories of clients of the network to allow operations to be performed locally thereon, the central database further having multiple checkpoints and a stable log stored in the server for tracking operations on the central database to allow corresponding operations to be made to the multiple checkpoints, the stable log having tails stored in the volatile memories to track operations on corresponding ones of the distributed counterparts, the distributed counterparts to corruption, a system for, and method of, restoring a distributed counterpart stored in one of the volatile memories. The system includes: (1) a checkpoint determination controller that determines which of the multiple checkpoints is a most recently completed checkpoint and copies the most recently completed checkpoint to the one of the volatile memories to serve as an unrevised database for reconstructing the distributed counterpart and (2) an operation application controller that retrieves selected ones of the operations from the stable log and a tail corresponding to the distributed counterpart and applies the operations to the unrevised database thereby to restore the distributed counterpart.
摘要翻译：为了与与网络的服务器相关联的中央数据库使用，中央数据库具有存储在网络的客户端的易失性存储器中的分布的对等体，以允许在本地执行操作，中央数据库还具有多个检查点和稳定的日志存储在服务器中用于在中央数据库上跟踪操作以允许对多个检查点进行相应的操作，稳定日志具有存储在易失性存储器中的尾部，以跟踪对应的分布对等体的操作，分布的对等体到腐败，系统和恢复存储在一个易失性存储器中的分布式对方的方法。该系统包括：（1）检查点确定控制器，其确定多个检查点中的哪一个是最近完成的检查点，并将最近完成的检查点复制到易失性存储器中的一个，以用作用于重建分布式对等体的未修复数据库，（2）操作应用程序控制器，其从稳定日志中检索所选择的操作和对应于分发对方的尾部，并将操作应用于未修改的数据库，从而恢复分布的对等体。

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