针对现有的分布计算模型不能充分描述冗余服务的特点，文中基于分布对象的观点，提出一个面向冗余服务的计算模型ＨＯＲＩＳ．它利用类和实例的概念定义了冗余服务，并将状态服务和无状态服务区分开来，同时还刻画了分布计算环境中的请求和主机的概念．在ＨＯＲＩＳ的基础之上，文中创建了一个冗余服务的管理框架ＡＭＡ，并在ＣＯＲＢＡ 平台上进行了实现．与其它冗余服务的管理框架相比，它具有接口开放、适应性强、能管理异构服务以及可扩展性强等优点 In view of the existing distributed computing model can not fully describe the characteristics of redundant services, this paper proposes a computing model based on distributed objects HORIS. It uses the concepts of classes and instances to define redundant services and to distinguish between stateful services and stateless services. It also describes the concepts of requests and hosts in a distributed computing environment. Based on HORIS, a redundant service management framework AMA was created and implemented on the CORBA platform. Compared with the management framework of other redundant services, it has the advantages of open interfaces, adaptability, ability to manage heterogeneous services, and high scalability