面向网格的事务提交及恢复协议

A Transaction Committing Protocol and Malfunction Recovering Oriented Grid Environment

该文在基于Agent的网格事务模型的基础上,提出网格环境下事务的提交协议,对其进行了性能分析。通过理论分析表明,提出的ENP协议降低了提交协议的消息复杂度和日志复杂度,参与者站点拥有较高的自治性,能够满足网格环境中各参与者的自治性要求。然后给出网格环境中会出现的故障情况:提供服务的数据库取消所提供服务时出现的故障。提出网格环境下的故障恢复协议:超时协议和重启动协议;使得在等待超时或站点出现故障时能及时有效地恢复到一个正确状态。分析了网格环境下特有的故障形式,给出相应的处理方式。最后,对故障恢复协议进行了简要分析。

In this paper,base on the transaction model under grid environment,we put forward the grid transaction committing protocol,the analysis indicate that the ENP protocol lowered the message complexity and the log complexity of committing protocol,and the participant own the higher autonomy,which can satisfy participant the need of autonomy in grid environment.Then we analysis the case in grid environment:the database cancels the service it offered.That will result in the failure.The recovering mechanism:timeout protocol and restarted protocol is gived in the paper.They make the database can recover to a correct state in time and availably when it is timeout or breaks down.It analyzes the special failure form of grid environment,and gives the corresponding processing method.At last,analyzes the recovering protocol briefly.