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    • 9. 发明公开
    • Method and apparatus for I/O priority control in storage systems
    • Speichersystemen的Verfahren und Vorrichtungfürdie E / A-Prioritätssteuerung
    • EP2120138A2
    • 2009-11-18
    • EP08017996.3
    • 2008-10-14
    • Hitachi Ltd.
    • Hara, Junichi, c/o Hitachi, Ltd.
    • G06F3/06H04L29/08
    • G06F3/0659G06F3/0607G06F3/061G06F3/067H04L29/12028H04L29/12254H04L29/12886H04L61/103H04L61/2038H04L61/6045
    • In exemplary embodiments a storage control unit is able to provide and track priority control among virtual ports created for corresponding physical ports and/or volume groups made up of one or more volumes, and thereby ensure application of priority settings. According to exemplary embodiments, when a virtual port created for a physical port on a first storage control unit is transferred to another physical port, such as in the same storage control unit or on another storage control unit, priority settings on the first physical port and storage control unit are checked and transferred with the virtual port to the other physical port to prevent competition for priority by virtual ports at the destination physical port. Similarly, priority settings assigned to volume groups may also be transferred when a volume group is transferred to another physical port within a storage control unit or to a different storage control unit.
    • 在示例性实施例中,存储控制单元能够为由对应的物理端口和/或由一个或多个卷组成的卷组创建的虚拟端口之间提供和跟踪优先级控制,从而确保应用优先级设置。 根据示例性实施例,当为第一存储控制单元上的物理端口创建的虚拟端口被传送到诸如同一存储控制单元或另一存储控制单元的另一物理端口时,在第一物理端口上的优先级设置和 存储控制单元与虚拟端口检查并传输到另一物理端口,以防止目的物理端口上虚拟端口的优先级竞争。 类似地,当卷组被传送到存储控制单元中的另一物理端口或不同的存储控制单元时,分配给卷组的优先级设置也可以被传送。