基于CORBA的负载平衡中间件设计和实现

阐述了一个基于CORBA的负载平衡中间件的设计和实现.该负载平衡中间件引入GCS服务来增强系统容错能力;提供了适应性负载平衡策略;可以采集不同负载数据;支持服务器动态加入和退出.针对客户端请求中有状态相关请求的情况,该负载平衡中间件使用复制技术提供状态相关服务,并且与由PSS支持的状态相关服务进行了性能比较和分析.实验表明,2种方法会因为状态相关请求所占负载的多少和状态相关请求比率的不同表现出不同的性能.

Design and implementation of efficient adaptive CORBA-based load balancing framework

The design and implementation of a CORBA(common object request broker architecture)-based load balancing middleware are described.Key features of this middleware are its ability to tolerate faults by means of GCS(group communication service),make load balancing decisions based on various workload metrics,and support servers to join and leave dynamically.In order to support the processing of state-dependent client requests,the middleware provides state-dependent service by replication technique.Further,the state-dependent service based on replication is compared with the one based on CORBA PSS(persistent state service of CORBA) on the performance.Experimental results show that the performance of the two methods varies with state-dependent client requests load and state-dependent client requests ratio.