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Rehost a volume in a SnapMirror relationship

Contributors netapp-aaron-holt netapp-lenida dmp-netapp netapp-dbagwell netapp-ahibbard netapp-aherbin
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You can rehost a volume defined as part of a SnapMirror relationship. There are several issues you need to consider before rehosting the relationship.

About this task

  • Rehosting is a disruptive operation.

  • If the rehosting operation fails, you might need to reconfigure the volume policies and the associated rules on the source volume.

  • After the rehost operation, the following volume policies, policy rules, and configurations are lost from the source volume and must be manually reconfigured on the rehosted volume:

    • Volume and qtree export policies

    • Antivirus policies

    • Volume efficiency policy

    • Quality of service (QoS) policies

    • Snapshot policies

    • Quota rules

    • ns-switch and name services configuration export policy and rules

    • User and group IDs

Before you begin

  • The volume must be online.

  • Volume management operations, such as volume moves or LUN moves, must not be running.

  • Data access to the volume that is being rehosted must be stopped.

  • The ns-switch and name services configuration of the target SVM must be configured to support data access of the rehosting volume.

  • The user ID and group ID of the volume must be either available in the target SVM or changed on the hosting volume.

Steps

  1. Record the SnapMirror relationship type:

    snapmirror show

    This is a precautionary step to avoid losing information about the SnapMirror relationship type in case the volume rehost fails.

  2. From the destination cluster, delete the SnapMirror relationship:

    snapmirror delete

    Do not break the SnapMirror relationship; otherwise, the data protection capability of the destination volume is lost and the relationship cannot be reestablished after the rehosting operation.

  3. From the source cluster, remove the SnapMirror relationship information:

    snapmirror release -relationship-info-only true

    Setting the -relationship-info-only parameter to true removes the source relationship information without deleting the snapshots.

  4. If the volume is mounted, unmount it:

    volume unmount -vserver <source_svm> -volume <vol_name>

  5. Switch to the advanced privilege level:

    set -privilege advanced

  6. Rehost the volume on the destination SVM:

    volume rehost -vserver <source_svm> -volume <vol_name> -destination-vserver <destination_svm>

  7. If the SVM peering relation is not present, create the SVM peer relationship between the source SVM and destination SVM:

    vserver peer create

  8. Create the SnapMirror relationship between the source volume and destination volume:

    snapmirror create

    You must run the snapmirror create command from the SVM that is hosting the DP volume. The rehosted volume can be the source or destination of the SnapMirror relationship.

  9. Resynchronize the SnapMirror relationship.

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