At the same time, it gains rapid response to the enormous accessing, and it brings replica server a temporary change to not build replicas so that the w/r efficiency is improved.

• PQ 算法通过在域内创建副本，从而减轻域内单个或若干个同一数据副本的访问压力，同时对剧烈增长的用户访问请求作出及时响应，并且允许文件及副本主机服务器性能暂时波动而不创建副本，极大提高了元数据读写效率。