分布式系统高可用度方案的选择

The Selection of High Availability Scheme for Distributed System

首先给出分布式系统的任务可用度与分布式互备份系统的定义。然后从任务可用度的角度出发 ,分别建立分布式互备份系统与分布式容错系统的任务可用度模型。最后 ,对分布式互备份系统和分布式容错系统的任务可用度进行比较和分析 ,得出许多有益的结论 ,它可以为分布式系统的可靠性设计与备份方案的选取提供理论依据。

In this paper, the definitions of distributed system mission availability (MA) and distributed inter-backup system (DIBS) are presented firstly. Then, the mission availability models of DIBS and distributed fault-tolerant system (DFTS) are set up separately. At last, by compared and analyzed mission availability of the two systems, some useful conclusions are drawn, which can be used as a theoretic evidence in distributed system reliability design and high availability scheme selection.\;