【摘要】 随着分布式应用技术的发展,构件的静态性限制了分布式系统在运行期间适应其可用资源变化的要求。为了动态适应系统可用资源,提高系统性能,支持构件可迁移的分布式应用研究受到广泛关注。针对提高构件可迁移分布式应用的可靠性,提出一种分布式系统容错算法。在准同步检查点算法的基础上,通过引入shadow-chain和通讯录机制,实现了构件间通信的可靠性和构件重定位的透明性,从而使得系统能够在较低代价下设置检查点,并能将出错后的系统回卷到一致性状态。更多还原

【Abstract】 With the development of distributed application technology,the static distributed component limits available resources to meet changing requirements.In order to enhance the system performance,distributed systems supporting component migrating has been wide concerned.To improve the dependability of distributed systems supporting component migrating,a distributed checkpoints algorithm is proposed.On the basis of index-based quasi-synchronous checkpoint algorithm,the reliability of communication between components and transparency of relocation of component is achieved by means of shadow-chain and address book mechanisms,this algorithm can take checkpoints at the lower price,and roll back the latest state of consistency.更多还原