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HyperReplication Feature Guide for Block

OceanStor V5 Series V500R007

This document is applicable to OceanStor 5110 V5, 5110F V5, 5300 V5, 5300F V5, 5500 V5, 5500F V5, 5600 V5, 5600F V5, 5800 V5, 5800F V5, 6800 V5, 6800F V5, 18500 V5, 18500F V5, 18800 V5, and 18800F V5. It describes the working principle and application scenarios of the HyperReplication feature (for block). Also, it explains how to configure and manage the feature.
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Splitting a Consistency Group

Splitting a Consistency Group

By performing this operation, you can split all remote replication pairs in a consistency group simultaneously so that a full data copy is generated for each secondary LUN in each pair, facilitating report generation, test, data mining, decision making, and data recovery.

Precautions

  • Based on Running Status of a consistency group, determine whether the consistency group can be split, as shown in Table 4-23.
    Table 4-23 Status requirements for splitting a consistency group

    Running Status of a Consistency Group

    Splitting Remote Replication Pairs in a Consistency Group (Supported or Not)

    Normal

    Yes

    Split

    No

    Interrupted (link down)

    Yes (Can be performed only on the primary device of a consistency group.)

    Interrupted (link up)

    Yes

    To be recovered

    Yes

    Invalid

    No

    Synchronizing

    Yes

  • When a synchronous consistency group is splitting, if the storage system has a controller reset, some remote replication pairs in the consistency group may fail to be split. As a result, the consistency groups cannot guarantee data consistency between the primary and secondary LUNs.

Procedure

  1. Log in to DeviceManager.
  2. Go to the remote replication consistency group page.

    The operation path varies with user types:

    • System user: Click vStore, select the desired vStore, and click Details to go to the vStore view. Choose Data Protection > Remote Replication > Remote Replication Consistency Group.
    • vStore user: In the vStore view, choose Data Protection > Remote Replication > Remote Replication Consistency Group.

  3. Right-click the desired consistency group and choose Split.

    The security alert dialog box is displayed.

  4. Confirm the operation of splitting remote replication pairs in the consistency group.

    1. Carefully read the contents of the dialog box. Select I have read and understand the consequences associated with performing this operation. Click OK to confirm the information.
    2. Click OK.

      The Success dialog box is displayed, indicating that the operation succeeded.

    3. Click OK.

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Updated: 2019-07-11

Document ID: EDOC1000181492

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