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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 Remote Replication Pair

Splitting a Remote Replication Pair

If you want a secondary resource to save data on a primary resource at a specific point in time, maintain a remote replication link, or expand network bandwidth, you must split the remote replication pair. After the remote replication pair is split, the data written into the primary resource by the application server will not be synchronized to the secondary resource. This may cause data inconsistency between the primary resource and secondary resource.

Prerequisites

  • The remote replication pair that you want to split is not added to a consistency group.
  • Based on Pair Running Status of the remote replication pair, determine whether the remote replication pair can be split, as shown in Table 3-21.
    Table 3-21 Status requirements for splitting a remote replication pair

    Running Status of a Remote Replication Pair

    Splitting a Synchronous Remote Replication Pair (Supported or Not)

    Splitting an Asynchronous Remote Replication Pair (Supported or Not)

    Normal

    Yes

    Yes

    Split

    No

    No

    Interrupted (link down)

    Yes (Can be performed on the primary storage system only.)

    Yes (Can be performed on the primary storage system only.)

    Interrupted (link up)

    Yes

    Yes

    To be recovered

    Yes

    Yes

    Synchronizing

    Yes

    Yes

    Invalid

    No

    No

Precautions

If the remote replication pair does not complete the initial synchronization, splitting the remote replication pair will cause data on the secondary resource unavailable. Perform this operation with caution.

Procedure

  1. Log in to DeviceManager.
  2. Choose Data Protection > Remote Replication > Remote Replication Pair.
  3. Right-click the remote replication pair you want to split and choose Split.

    The security alert dialog box is displayed.

  4. Confirm the remote replication pair splitting.

    1. Confirm the information in the dialog box. Select I have read and understand the consequences associated with performing this operation. Click OK.

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

    2. Click OK.
    NOTE:

    After a pair is split, change the secondary resource protection status to readable and writable. Secondary resource data will be rolled back to the status at the point in time when the last pair synchronization is complete.

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Updated: 2019-07-11

Document ID: EDOC1000181492

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