一种统一存储网的Cache方案

A cache scheme of united storage network

统一存储网融合了NAS和SAN的优点,但对小写数据其I/O性能不高.在客户端采用NVRAM和日志磁盘构成一个两层的Cache,可以将小写数据积累成大写数据,达到提高性能的目的;采用基于租约的Cache一致性协议可以保证网络中断或客户出错时USN的可用性和数据的一致性;实验显示Cache方案可以使USN的性能最大提高50%.

United storage network integrates some advantages of NAS and SAN,but it also brings low performance to little data block. A hierarchical cache is made up of non -volatile RAM and log disk at client,that can make little I/O data blocks into large I/O data block and improve USN I/O performance. Using Cache coherence protocol based lease can provide USN availability and data coherence as a client is partitioned from server. Experiment proved that the cache scheme can improve USN performance to 50 %.