存储虚拟化是对存储资源的整合和再分配,可以将不同厂商的异构存储资源整合为统一的逻辑存储资源,从而简化异构存储的复杂性。根据IDC公司统计,2012年出货的外部磁盘存储系统容量超过20EB,比2011年增长27%,同时预测2013年到2017年间,年存储容量销量将会每年增加30%以上。企业对于存储的采购每年都有大幅的增加,但利用率往往不高。据调查显示,存储容量利用率仅为30%左右,70%的存储容量 Storage virtualization is the consolidation and redistribution of storage resources. It can consolidate heterogeneous storage resources from different vendors into a unified logical storage resource, thus simplifying the complexity of heterogeneous storage. According to IDC’s statistics, the external disk storage system shipped in 2012 exceeded 20EB, an increase of 27% over 2011. It is also predicted that annual storage sales will increase by more than 30% annually between 2013 and 2017. Business purchases have increased dramatically each year for storage, but utilization rates tend to be low. According to the survey, storage capacity utilization is only about 30%, 70% of storage capacity