提出了一种基于文件分块访问的动态副本管理的容错控制机制,它根据邮箱服务器的可靠性指标决定文件的分块数目和选择合适的邮箱存储分块文件,并动态地调整邮箱服务器可靠性指标.
A kind of fault tolerance control mechanism based on file division access and dynamic replications management is put forward. It determines the number of file division and appropriate mail server to save this division by the credibility of mail server, and changes the credibility dynamically by recording each mail server' s access activity.