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    Snapshot creation
    1.
    发明授权
    Snapshot creation 有权

    公开(公告)号：US10268695B2

    公开(公告)日：2019-04-23

    申请号：US15521336

    申请日：2014-12-15

    Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

    Inventor： Girish Chandra Belmanu Sadananda ,  Santosh Bangalore Balaraj ,  Alastair Slater ,  Subramani Nallusamy

    IPC: G06K9/00 ,  G06F17/30 ,  G06F11/14

    Abstract: In one example an updated snapshot delta value is computed upon occurrence of a new transaction. The new transaction is a data modification operation performed on data blocks of the storage device. Further, the delta value indicates at least one of volume of data modified since creation of a reference snapshot and number of transactions performed since the creation. Subsequently, the updated snapshot delta value is compared with a corresponding threshold value. The threshold value is at least one of a predetermined volume of data modified and a predetermined number of transactions. A snapshot action is subsequently performed based on the comparison.

    SNAPSHOT STORAGE MANAGEMENT
    2.
    发明申请
    SNAPSHOT STORAGE MANAGEMENT 审中-公开

    公开(公告)号：US20180188967A1

    公开(公告)日：2018-07-05

    申请号：US15737592

    申请日：2015-09-23

    Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

    Inventor： Girish Chandra Belmanu Sadananda ,  Santosh Balaraj Bangalore ,  Alastair Slater

    IPC: G06F3/06

    CPC classification number: G06F3/065 ,  G06F3/0604 ,  G06F3/0619 ,  G06F3/0644 ,  G06F3/0673 ,  G06F3/0689 ,  G06F11/00 ,  G06F11/14

    Abstract: In one example, primary data storage volume to store primary data blocks, and snapshot data storage volume to store snapshot data with snapshot data blocks representing copy-on-write (COW) data blocks of the primary data blocks, and with snapshot pointers to reference the primary data blocks representing non-COW data blocks of the primary data blocks of the primary data storage volume. A mapping table with primary volume mapping pointers to reference the primary data blocks, and snapshot volume mapping pointers to reference the snapshot data blocks. In response to a restore operation, perform a swap function that includes: updating the mapping table to have the primary volume mapping pointers to reference corresponding COW data blocks of the snapshot data storage volume, updating the mapping table to have the snapshot volume mapping pointers to reference corresponding primary data blocks of the primary data storage volume.

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