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HyperClone 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. This document describes the implementation principles and application scenarios of the clone feature. Also, it explains how to configure and manage clones.
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Creating a LUN Clone

Creating a LUN Clone

After creating a LUN clone, you can use it to generate multiple physical copies of a source LUN at different splitting points in time. These data copies can be used independently without affecting the source LUN data.

Prerequisites

  • The HyperClone license is valid.
  • In a clone, each secondary LUN has the same size as the primary LUN.
  • In a clone, the owning controller of the primary LUN and that of the secondary LUNs are the same.

Context

Only administrators and super administrators are allowed to create a LUN clone.

Procedure

  1. Log in to DeviceManager.
  2. Click vStore, select the desired vStore, and click Details to go to the vStore view. Choose Data Protection > Clone > LUN.

    The page for operating clone LUNs in the vStore is displayed.

  3. Click Create.

    The Create Clone Wizard dialog box is displayed.

  4. Set Name and Description of the clone, and click Next.

    Table 3-2 describes the parameters of a clone.

    Table 3-2 Clone parameters

    Parameter

    Description

    Value

    Name

    Name of a clone.

    NOTE:

    Name a clone in accordance with the associated value range so that the LUN is available to host applications.

    [Value range]

    • The name must be unique.
    • The name can contain only letters, digits, periods (.), underscores (_), and hyphens (-).
    • The name contains 1 to 31 characters.

    [Example]

    Clone001

    Description

    Description of a clone.

    [Example]

    -

  5. Select a primary LUN for the clone.

    1. Select the desired primary LUN.
    2. Click Next.

  6. Select secondary LUNs for the clone.

    1. In the Available Secondary LUNs area, select the desired secondary LUNs.
      NOTE:

      If no secondary LUN is available, click Create Secondary LUN and create a secondary LUN.

    2. Click .

      The secondary LUNs are moved to the Selected Secondary LUNs area.

    3. Click Next.

  7. Set properties for the clone.

    1. Set pair properties for the clone. Table 3-3 describes the parameters of a clone pair.
      Table 3-3 Clone pair parameters

      Parameter

      Description

      Value

      Copy Speed

      Speed of data synchronization between the primary and secondary LUNs. Possible values are as follows:

      • Low: When the speed is set to low, the data synchronization 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, the data synchronization 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, the data synchronization 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, the data synchronization will take 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

      In the event of a system problem such as a disk array fault or a LUN failure, all the pairs in a clone are interrupted. For synchronization or reverse synchronization tasks that are ongoing when a system problem occurs:

      • If Recovery Policy is Automatic, suspended tasks automatically resume once the problem is resolved.
      • If Recovery Policy is Manual, the value of Pair Running Status changes to To be recovered once the system problem is resolved. In this case, you can check the system before deciding whether to manually resume the suspended tasks.

      [Example]

      Automatic

      Enable initial synchronization

      Indicates whether to implement an initial synchronization of data from the primary LUN to the secondary LUN.

      NOTE:

      Initial synchronization ensures data consistency between the primary and secondary LUNs. You are advised to enable initial synchronization.

      [Example]

      Enable

    2. Click Next.

  8. Confirm that information about the clone is complete.

    1. Check the clone's parameters.
    2. Click Finish.

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

    3. Click Close.

      You have finished creating the clone.

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Updated: 2019-07-11

Document ID: EDOC1000181501

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