Workflow for operating Thin Image pairs

REST API Reference Guide for Virtual Storage Platform 5000, Virtual Storage Platform E Series, and Virtual Storage Platform G/F Series

Part Number
The following shows the Thin Image functions that can be run by the REST API:
  • Getting information about snapshot groups

    Obtains a list of snapshot groups registered in the target storage system.

  • Getting pair status and configuration information

    Obtains a Thin Image pair status and configuration information. You can check if a pair operation is complete. You can also obtain pair information in units of snapshot groups.

  • Creating a pair

    Creates a new Thin Image pair in a snapshot group of the target storage system. If the snapshot group is not created, the snapshot group is automatically created. You will be able to perform operations in units of snapshot groups by creating Thin Image pairs in a snapshot group.

    To create a pair in a new snapshot group:

    To create a pair in an existing snapshot group:

    When creating a pair, you can specify whether the clone attribute can be set and whether a cascade configuration is possible.

  • Storing snapshot data

    Splits a Thin Image pair, and then stores snapshot data, after the primary volume is updated.

  • Resynchronizing a pair

    Deletes old snapshot data by resynchronizing a pair. You can perform pair resynchronization if the pair status is PSUS. When pair resynchronization is complete, new snapshot data can be automatically stored again.

  • Recovering a pair by a restore

    If you restore a split Thin Image pair, data of the primary volume is restored to the data from when the snapshot data was stored. You can also perform a restore in units of snapshot groups. You can perform a restore if the pair status is PSUS.

  • Assigning a secondary volume to snapshot data

    Assigns a secondary volume to the snapshot data of the specified Thin Image pair. Create in advance a virtual volume for Thin Image to be used as the secondary volume. If you assign a secondary volume, you can view the snapshots.

  • Unallocating the secondary volume for snapshot data

    Unallocates the secondary volume of the specified Thin Image pair.

  • Deleting a pair

    Deletes a Thin Image pair that is unnecessary. If you delete a pair, the snapshot data is deleted from the Thin Image pool or the HDP pool. In addition, if the specified Thin Image pair is the last one in a snapshot group, the snapshot group is also deleted. You can also delete pairs in units of snapshot groups or snapshot trees.

    You can delete a pair at any time regardless of the pair status. However, if you delete a pair while the pair status is being changed, the pair might be deleted before its status is changed, and the request to change the pair status might time out.

  • Cloning

    After all the data of the primary volume of a Thin Image pair that has the clone attribute is copied to the secondary volume, the pair is deleted.