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    • 10. 发明授权
    • Storage system, storage control method and storage control program
    • 存储系统,存储控制方法和存储控制程序
    • US08943270B2
    • 2015-01-27
    • US13639926
    • 2012-07-24
    • Hideki NagasakiHirokazu OgasawaraTaro Ishizaki
    • Hideki NagasakiHirokazu OgasawaraTaro Ishizaki
    • G06F12/00G06F13/16
    • G06F12/00G06F3/0605G06F3/0631G06F3/0647G06F3/0653G06F3/0685G06F13/16
    • In tiered storage subsystems in which pages are automatically allocated to appropriate storage media based on the access frequency in page units, since the number of storage media is not simply proportional to the performance, it was difficult to design in advance a tier configuration satisfying the required performance. According to the present invention, a cumulative curve of I/O distribution is created based on a result of measurement of I/O accesses performed to the storage subsystem, and RAID groups (RG) are allocated sequentially in order from RGs belonging to tiers having higher performances to the cumulative curve of I/O distribution. When either a performance limitation value or a capacity of the RG exceeds the cumulative curve of I/O distribution, a subsequent RG is allocated, and the process is repeated so as to compute the optimum tier configuration.
    • 在分层存储子系统中,基于页面单元的访问频率将页面自动分配到适当的存储介质中,由于存储介质的数量不是简单地与性能成正比,因此难以预先设计满足所需的层次配置 性能。 根据本发明,基于对存储子系统执行的I / O访问的测量结果创建I / O分布的累积曲线,并且从属于具有 更高的性能与I / O分布的累积曲线。 当性能限制值或RG的容量超过I / O分布的累积曲线时,分配随后的RG,并且重复该过程,以便计算最佳层配置。