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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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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Verifying the Configuration

Verifying the Configuration

After a remote replication pair or consistency group is configured, you can view the status of the data on the primary and secondary storage systems to check whether data replication between the primary and secondary LUNs is successful.

Remote Replication Pair

  • The primary and secondary storage systems are correctly connected to the application server.
  • Initial synchronization of the remote replication task has been completed.
  1. Map the primary and secondary LUNs to hosts.

    1. Log in to DeviceManager. Choose Provisioning > LUN > LUN Group. Click Create to create LUN groups and add the primary and secondary LUNs of the remote replication pair to corresponding LUN groups.
    2. Choose Provisioning > Mapping View. Select the mapping view of the host group to which the host belongs. Then add the newly created LUN group to this mapping view.
    NOTE:

    To check on a standby server whether data replication succeeds, you need to mount the secondary LUN to the standby server. Before mounting the secondary LUN, split the remote replication pair in which the secondary LUN resides and set Status of Secondary Resource Protection to Read/Write.

  2. Check whether data replication succeeded.

    1. Log in to the application server at the primary site and create file X.txt in the primary LUN. When Pair Running Status is Normal, go to the next step.
    2. Log in to DeviceManager at the primary site. Choose Data Protection > Remote Replication > Remote Replication Pair. Click the remote replication pair to be synchronized. Choose More > Synchronize to manually perform data synchronization.
    3. Log in to the standby server at the secondary site to check whether data file X.txt exists in the secondary LUN.
      • If yes, data replication succeeded.
      • If no, log in to DeviceManager at the primary site. Choose Data Protection > Remote Replication > Remote Replication Pair. Click the remote replication pair to be synchronized. Choose More > Synchronize to perform the synchronization manually.

  3. Check whether a primary/secondary switchover can be performed at the secondary site.

    1. Log in to DeviceManager at the secondary site. Choose Data Protection > Remote Replication > Remote Replication Pair and perform the following operations.
      1. Select the remote replication pair to be split and choose More > Split.
      2. Click Properties. Change Status of secondary resource protection to Read/Write to set the secondary LUN to readable and writable.
      3. Choose More > Primary/Secondary Switchover to switch the secondary LUN to the primary LUN.
    2. Log in to the standby server at the secondary site and create file Y.txt in the new primary LUN. Check whether the primary LUN is readable and writable.
      • If yes, a primary/secondary switchover can be performed at the secondary site.
      • If no, a primary/secondary switchover cannot be performed at the secondary site. Check whether an alarm about remote replication exists in DeviceManager at the primary and secondary sites.
        • If yes, solve the fault based on the alarm information and repeat the previous operations.
        • If no, contact Huawei technical support.

  4. Check whether data can be recovered.

    1. Log in to DeviceManager at the secondary site, choose Data Protection > Remote Replication > Remote Replication Pair, and perform the following operations.
      1. Select the remote replication pair for which you want to enable secondary resource protection and click Properties. Change Status of secondary resource protection to Read-only to set the secondary LUN to read-only.
      2. Choose More > Synchronize to perform the synchronization manually.
    2. After the synchronization is complete, log in to the application server at the primary site to check whether file Y.txt exists in the secondary LUN (after the primary/secondary switchover).
      • If yes, data can be recovered.
      • If no, data cannot be recovered. Check whether an alarm about remote replication exists in DeviceManager at the primary and secondary sites.
        • If yes, solve the fault based on the alarm information and repeat the previous operations.
        • If no, contact Huawei technical support.
    3. Switch services back to the primary site after the verification. Log in to DeviceManager at the primary site, choose Data Protection > Remote Replication > Remote Replication Pair, and perform the following operations.
      1. Select the remote replication pair to be split and choose More > Split.
      2. Click Properties. Change Status of secondary resource protection to Read/Write to set the secondary LUN to readable and writable.
      3. Choose More > Primary/Secondary Switchover.
      4. Click Properties. Change Status of secondary resource protection to Read-only to set the secondary LUN to read-only.
      5. Choose More > Synchronize to perform the synchronization manually.

Remote Replication Consistency Group

  • The primary and secondary storage systems are correctly connected to the application server.
  • Initial synchronization for the consistency group is complete.
  • Remote replication pairs have been created and added to the consistency group.
NOTE:

After remote replication pairs are added to a consistency group, you can only perform operations on the consistency group and cannot perform operations on the pairs in the consistency group.

  1. Map all the primary and secondary LUNs in the consistency group to the host.

    1. Log in to DeviceManager. Choose Provisioning > LUN > LUN Group. Click Create to create LUN groups and add the primary and secondary LUNs of the remote replication pair to corresponding LUN groups.
    2. Choose Provisioning > Mapping View. Select the mapping view of the host group to which the host belongs. Then add the newly created LUN group to this mapping view.
    NOTE:

    To check on a standby server whether data replication succeeds, you need to mount the secondary LUN to the standby server. Before mounting the secondary LUN, split the remote replication pair in which the secondary LUN resides and set Status of Secondary Resource Protection to Read/Write.

  2. Check whether data replication succeeded.

    1. Log in to the application server at the primary site and create file X1.txt on all primary LUNs of the consistency group. When Running Status of the consistency group is Normal, go to the next step.
    2. Log in to DeviceManager at the primary site. Choose Data Protection > Remote Replication > Remote Replication Consistency Group. Click the remote replication consistency group to be synchronized. Choose More > Synchronize to perform the synchronization manually.
    3. Log in to the standby server at the secondary site to check whether data file X1.txt exists in the secondary LUNs of the consistency group.
      • If yes, data replication succeeded.
      • If no, log in to DeviceManager at the primary site. Choose Data Protection > Remote Replication > Remote Replication Consistency Group. Click the consistency group to be synchronized. Choose More > Synchronize to perform the synchronization manually.

  3. Check whether a primary/secondary switchover can be performed at the secondary site.

    1. Log in to DeviceManager at the secondary site, choose Data Protection > Remote Replication > Remote Replication Consistency Group, and perform the following operations.
      1. Select the consistency group to be split and choose More > Split.
      2. Select the consistency group for which you want to disable secondary resource protection. Choose More > Disable Protection for Secondary Resource to set secondary LUNs of all remote replication pairs in the consistency group to readable and writable.
      3. Select the consistency group for which you want to perform a primary/secondary switchover. Choose More > Primary/Secondary Switchover to switch secondary LUNs of all remote replication pairs in the consistency group to primary LUNs.
    2. Log in to the standby server at the secondary site and create file Y1.txt in the new primary LUNs in the consistency group. Check whether the primary LUNs are readable and writable.
      • If yes, a primary/secondary switchover can be performed at the secondary site.
      • If no, a primary/secondary switchover cannot be performed at the secondary site. Check whether an alarm about remote replication exists in DeviceManager at the primary and secondary sites.
        • If yes, solve the fault based on the alarm information and repeat the previous operations.
        • If no, contact Huawei technical support.

  4. Check whether data can be recovered.

    1. Log in to DeviceManager at the secondary site. In the navigation tree, choose Data Protection > Remote Replication > Remote Replication Consistency Group and perform the following operations:
      1. Select the consistency group for which you want to enable secondary resource protection. Choose More > Enable Protection for Secondary Resource to set secondary LUNs of all remote replication pairs in the consistency group to read-only.
      2. Select the remote replication pair to be synchronized. Choose More > Synchronize to perform the synchronization manually.
    2. After the synchronization is complete, log in to the application server at the primary site to check whether file Y1.txt exists in the secondary LUNs (after the primary/secondary switchover).
      • If yes, data can be recovered.
      • If no, data cannot be recovered. Check whether an alarm about remote replication exists in DeviceManager at the primary and secondary sites.
        • If yes, solve the fault based on the alarm information and repeat the previous operations.
        • If no, contact Huawei technical support.
    3. Switch services back to the primary site after the verification. Log in to DeviceManager at the primary site, choose Data Protection > Remote Replication > Remote Replication Consistency Group, and perform the following operations.
      1. Select the consistency group to be split and choose More > Split.
      2. Choose More > Disable Protection for Secondary Resource to set secondary LUNs of all remote replication pairs in the consistency group to readable and writable.
      3. Choose More > Primary/Secondary Switchover to switch secondary LUNs of all remote replication pairs in the consistency group to primary LUNs.
      4. Choose More > Enable Protection for Secondary Resource to set secondary LUNs of all remote replication pairs in the consistency group to read-only.
      5. Select the consistency group to be synchronized. Choose More > Synchronize to perform the synchronization manually.

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Updated: 2019-07-11

Document ID: EDOC1000181492

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