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1. 发明授权

US5745674A Management of units of work on a computer system log 失效
标题翻译：管理计算机系统日志上的工作单位
公开(公告)号：US5745674A
公开(公告)日：1998-04-28
申请号：US657507
申请日：1996-06-04
申请人： Peter James Lupton , Robert Frank Buxton , Ian Hunter , Handel Glasnant Price , Adam Richards , John Simon Tilling , Dennis Jack Zimmer
发明人： Peter James Lupton , Robert Frank Buxton , Ian Hunter , Handel Glasnant Price , Adam Richards , John Simon Tilling , Dennis Jack Zimmer
IPC分类号： G06F11/14
CPC分类号： G06F11/1471
摘要： A method of moving records, stored on a recovery log, which are associated with units of work which have waited for a long time is described. Units of work which have waited for a long time, such as those which are in-doubt have their records copied from a recovery log to a secondary log. When the earliest-written record for this in-doubt unit of work has been copied, a new record called a fork record is written on to the recovery log which has two effects: to subtract the log records currently on the recovery log for this unit of work from the recovery log and to refer to the copied records written on the secondary log. The new record achieves this using two pointers, a pointer to point to the most-recently written record on the recovery log for this unit of work and a pointer to point to the most-recently written record on the secondary log for this unit of work.
摘要翻译：描述了存储在恢复日志上的与已经等待很长时间的工作单元相关联的记录的方法。已经等待很长时间的工作单位，例如无疑是将其记录从恢复日志复制到辅助日志。当这个不确定的工作单位的最早的书面记录被复制时，一个名为fork记录的新记录被写入恢复日志，这有两个作用：减去当前在该单元的恢复日志上的日志记录的恢复日志中的工作，并参考在辅助日志中写入的复制记录。新记录使用两个指针来实现这一点，指针指向该单元工作的恢复日志上最近写入的记录，并指向指向该单元工作的次日志上最近写入的记录的指针。

2. 发明授权

US06247038B1 Optimized synchronization procedure 失效
标题翻译：优化同步程序
公开(公告)号：US06247038B1
公开(公告)日：2001-06-12
申请号：US08682830
申请日：1996-07-12
申请人： Timothy William Banks , Ian Hunter , Glyn Normington , Dennis Jack Zimmer , Peter James Lupton
发明人： Timothy William Banks , Ian Hunter , Glyn Normington , Dennis Jack Zimmer , Peter James Lupton
IPC分类号： G06F900
CPC分类号： G06F9/466
摘要： Disclosed is a method for providing synchronization of a transaction in a data processing system where the transaction involves a plurality of agents participating in the transaction and one coordinator for coordinating the transaction. The agents include at least a middleman which coordinates a set of at least one of the agents. A vote is sent indicating the availability or non-availability to commit from each of the agents to the coordinator. The coordinator determines a commit or backout decision when all the votes are received. A Not Known decision message is sent from the middleman to each of the agents in the set available to commit if the decision is not available at the middleman because of a failure. The Not Known decision message stops resynchronization of each of the available agents. If the middleman has responsibility for resynchronization then, on availability of the decision at the middleman, a resynchronization message is sent to each of the available agents. If the middleman does not have responsibility for resynchronization, then a Known decision message is sent to each of the available agents from the middleman. Receipt of the Known decision message starts resynchronization of each of the available agents.
摘要翻译：公开了一种用于在数据处理系统中提供交易的同步的方法，其中交易涉及参与交易的多个代理以及用于协调交易的一个协调器。这些代理包括至少一个协调一组至少一个代理的中间人。发送表决，指示从每个代理提交到协调员的可用性或不可用性。当收到所有投票时，协调员确定提交或退出决定。 A如果由于失败导致中间人无法获得该决定，则可以从中间人向可用集合中的每个代理发送未知的决定消息。未知的决策消息停止每个可用代理的重新同步。如果中间人有重新同步的责任，那么在中间人的决定的可用性上，会向每个可用代理发送一个重新同步消息。如果中间人没有重新同步的责任，那么从中间人就可以向每个可用的代理发送已知的决定信息。已知决策消息的接收开始每个可用代理程序的重新同步。

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