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    • 3. 发明授权
    • Virtual logical volume for overflow storage of special data sets
    • 用于特殊数据集溢出存储的虚拟逻辑卷
    • US08909891B2
    • 2014-12-09
    • US13188142
    • 2011-07-21
    • David Charles ReedMax Douglas SmithKyle Barret DudgeonEsteban Rios
    • David Charles ReedMax Douglas SmithKyle Barret DudgeonEsteban Rios
    • G06F12/08G06F12/02G06F12/10G06F12/00
    • G06F12/08G06F3/0614G06F3/0665G06F3/0689G06F12/00G06F12/02G06F12/023G06F17/30312
    • Method embodiments for facilitating overflow storage of special data sets that reside on a single logical volume are provided. A virtual logical volume is created from unallocated memory units across a plurality of logical volumes in a volume group. The virtual logical volume appears the same as any one of the logical volumes in the volume group to an external client. Upon receipt of a special data set that must reside in a single logical volume, an attempt is first made to allocate the special data set to one of the logical volumes in the volume group. If that allocation attempt fails, the special data set is allocated to the virtual logical volume. The virtual logical volume may be created only upon the failure to allocate the special data set to one of the logical volumes, and may be destroyed if sufficient space in one of the logical volumes is freed up to transfer the special data set. Creation of the virtual logical volume may be reserved for only critical special data sets whose failure would result in a storage system outage.
    • 提供了用于促进驻留在单个逻辑卷上的特殊数据集的溢出存储的方法实施例。 虚拟逻辑卷是通过卷组中多个逻辑卷的未分配内存单元创建的。 虚拟逻辑卷与卷组中的任何一个逻辑卷显示为外部客户端相同。 在收到必须驻留在单个逻辑卷中的特殊数据集之后,首先尝试将特殊数据集分配给卷组中的一个逻辑卷。 如果分配尝试失败,则将特殊数据集分配给虚拟逻辑卷。 只有在将特殊数据集分配给其中一个逻辑卷时,才能创建虚拟逻辑卷,并且如果其中一个逻辑卷中的足够空间被释放以传输特殊数据集,则可能会被破坏。 虚拟逻辑卷的创建可能仅为关键的特殊数据集保留,这些特殊数据集的故障将导致存储系统中断。