【摘要】 <正> 一、引言目前,以CORBA为代表的分布对象计算技术已日趋成熟,越来越多的分布式应用系统利用CORBA提供的标准服务和协议来实现。基于CORBA的新一代的分布式系统,如分布式实时控制系统、在线支付系统和股票交易系统,需要可靠性保证。容错技术是分布式系统运行过程中可靠性保证的重要手段,可以在分布式系统的每一个层次实现,利用底层的CORBA基础设施提供容错机制具有显著的优势,既能够避免系统层为支持容错而做的巨大改变,又能够简化应用软件的设计。因此,容错CORBA已经成为国外CORBA研究的重更多还原

【Abstract】 Presently, distributed object technology such as CORBA has increasingly become mature. More and more distributed application systems are implemented using the standard services and protocols provided by CORBA. The new-generation distributed systems such as real time systems, online paying systems and stock exchange systems demand assurance of dependability. Fault tolerance is a main way of assurance of system reliability. Thereby, it requires low-level CORBA infrastructure to provide fault-tolerance mechanism to ensure dependability and availability. This paper firstly discusses implementation strategy and system model of fault-tolerance CORBA object systems. Secondly, it describes main challenges and solutions during the design of fault-tolerance CORBA systems. Thirdly it introduces fault-tolerance CORBA prototype system-TBAFTS on top of a CORBA-compliant object middleware, Tong-Broker developed by us independently. Finally we give our conclusion.更多还原