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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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Modifying the Properties of a Consistency Group

Modifying the Properties of a Consistency Group

By performing this operation, you can modify the name and description of a consistency group.

Precautions

The properties of pairs in a consistency group will not be changed after the properties of the consistency group are modified, but the working properties change to the properties of the consistency group.

Procedure

  1. Log in to DeviceManager.
  2. Choose Data Protection > Remote Replication > Remote Replication Consistency Group.
  3. Select the consistency group whose properties you want to modify and click Properties.

    The Properties of Consistency Group dialog box is displayed.

  4. Modify properties of the consistency group. Table 3-27 describes the related parameters.

    Table 3-27 Parameters of a consistency group

    Parameter

    Description

    Value

    Name

    Name of a consistency group.

    [Value range]

    • The name must be unique.
    • The name must start with a digit or letter and contain only letters, digits, periods (.), underscores (_), and hyphens (-).
    • The name contains 1 to 31 characters.

    [Example]

    ConsistentGroup001

    Description

    Description of a consistency group.

    [Example]

    None

    Synchronization Method

    Mode of data synchronization of the consistency group. The value can be:

    • Manual

      Synchronization is performed manually.

    • Timed wait after synchronization begins

      The system starts timing as soon as a synchronization begins. When the time specified in Interval has elapsed, the system automatically starts to synchronize data between the primary resource and secondary resource again.

    NOTE:

    If the latest synchronization is still being executed after the time specified in Interval has elapsed, the data synchronization will start after the latest synchronization finishes.

    • Timed wait after synchronization ends

      The system starts timing as soon as a synchronization ends. When the time specified in Interval has elapsed, the system starts to synchronize data again.

    NOTE:

    This parameter is available only when Replication Mode is set to Asynchronous.

    [Example]

    Manual

    Interval

    Waiting time for the two synchronization methods: Timed wait after synchronization begins and Timed wait after synchronization ends.

    NOTE:

    This parameter is available only when Synchronization Method is set to Timed wait after synchronization begins or Timed wait after synchronization ends.

    [Value range]

    • Integer from 1 to 1440 (minutes)
    • Integer from 10 to 59 (seconds)

    [Example]

    50 minutes

    Speed

    Rate of data synchronization of the consistency group. The value can be:

    • Low

      When the speed is set to low, remote replication will take a long time. This value is applicable to scenarios where the service load is heavy. The speed is normally from 0 to 5 MB/s.

    • Medium

      When the speed is set to medium, remote replication will take a relatively short period. This value is applicable to scenarios where the service load is relatively heavy. The speed is normally from 10 to 20 MB/s.

    • High

      When the speed is set to high, remote replication will take a short period. This value is applicable to scenarios where the service load is relatively light. The speed is normally from 50 to 70 MB/s.

    • Highest

      When the speed is set to highest, remote replication will be complete in the shortest period. This value is applicable to scenarios where the service load is light. The speed is normally above 100 MB/s.

    [Example]

    Medium

    Recovery Policy

    After an internal I/O error is rectified or the replication link is up, the consistency group automatically synchronizes data or not. The value can be:

    • Manual

      The consistency group enters the To be recovered state. You need to manually synchronize the data from the primary resource to the secondary resource.

    • Automatic

      The consistency group enters the Synchronizing state. The system will automatically synchronize the data from the primary resource to the secondary resource.

    [Example]

    Automatic

    Link Compression

    During data synchronization between the primary and secondary resources, data is compressed or not. If you select data compression, the bandwidth pressure of replication links is reduced and the replication performance is improved. The value can be:

    • Compression
    • No compression
    NOTE:

    This parameter is available only when Replication Mode is set to Asynchronous.

    [Example]

    No compression

    Set the I/O timeout threshold for the secondary LUN

    If data is written into the primary LUN but fails to be written into the secondary LUN when the timeout period you set has elapsed, the remote replication pair enters the Interrupted status.

    NOTE:

    This parameter is available only when Replication Mode is set to Synchronous.

    [Example]

    Enabled

    Timeout Threshold (second)

    Timeout for data written into the secondary LUN.

    NOTE:

    This parameter is available only when Replication Mode is set to Synchronous.

    [Example]

    30

  5. Confirm the operation of modifying properties of the consistency group.

    1. Click OK.

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

    2. Click Close.

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Updated: 2019-07-11

Document ID: EDOC1000181492

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