基于半被动复制技术的业务连续性模型

个基于制节点能成为组通信中的主动复制技术和被动复制技术在实现能容错和容灾的分布式系统时，都具有很大的局限性。本文提出了一半被动复制技术的业务连续性模型，半被动复制技术吸取了上面两种复制技术各自的优点，在被动复制的基础上，每个复都可以作为主节点向外提供服务，这种实现不仅保证了各个复制节点上数据的一致性，也避免了被动复制技术中主节点可瓶颈的问题。此外，两阶段提交代理的引入使该模型具有更高的通用性。

BUSINESS CONTINUITY MODEL BASED ON SEMI-PASSIVE REPLICATION

Both active replication and passive replication in group communication system are limited in implementing the false-tolerance and disaster-tolerance distributed system. In this paper, we have presented a business continuity model based on semi-passive replication, which takes in the advantage of two former replication techniques. Based on passive replication, the semi-passive replication make every node be able to play the role of primary node, and this implement not only assures the consistency of the data on different nodes, but also solves the problem that the primary node may become the bottleneck in the passive replication. The presented two phase commit agent makes our model more universal.