基于CORBA的应用级容错系统的设计与实现

CORBA是一种当前流行的基于对象技术的中间件平台，它对应用屏蔽了分布式系统的异构性。但是目前的CORBA产品大多缺乏客错机制，而客错机制是分布式应用的关键问题之一。针对已有研究的缺陷和不足，文章设计并实现了一种新颖的应用级容错CORBA系统，采用对象复制技术和热备份技术来对抗服务对象失效，并有效保证了CORBA良好的互操作性。

Design And Implementation of Application-Level Fault Tolerant System Using CORBA

Nowadays, the Common Object Request Broker Architecture (CORBA) is one of the most popular standard for middleware platforms based on object technology. CORBA shields distributed applications from the heterogeneity of the distributed system. But most of the current CORBA products lack of fault tolerance issue which is actually one of the critical problems of the distributed applications. As a result, in the recent years the research in fault tolerance in CORBA becomes a hot spot in the field of research in CORBA technology. In the last few years, many methods have appeared in this literature. The advantages and drawbacks of such methods have been analyzed, and a novel fault tolerance approach in application level has been proposed in this paper. The approach this paper presents makes use of the technology of server object replication to deal with the invalidation of server object. Because of retaining the merit of CORBA such as cross-operation, this approach is suitable for multi-ORB environment. In addition to the cross-operation merit, this approach enables the legacy application to improve fault-tolerant capacity easily.