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Hitachi Vantara Knowledge

Migrating an EVS within a cluster

While migration of EVSs occurs automatically as part of the failover resiliency of a cluster, EVSs can be manually migrated to a different node in a cluster, or among servers or clusters within a server farm.

An individual EVS can be migrated to a different node within the same cluster, or all EVSs can be migrated to another server or another cluster. The current mapping of EVSs to cluster nodes can be preserved, and the saved map is called a preferred mapping.

Procedure

  1. Navigate to Home Server Settings EVS Migration to display the EVS Migration page.

    If the currently managed server is in a cluster and the NAS Manager is also managing at least one standalone server, the following page displays (if the NAS Manager is not managing a cluster and one or more standalone servers, this page does not display):
  2. Select Migrate an EVS from one node to another within the cluster to display the main EVS Migration page.

  3. Perform a migration of the type required.

    • To migrate all EVSs between cluster nodes:
      1. Select Migrate all EVS from cluster node ___ to cluster node ___.
      2. From the first list, select the cluster node from which to migrate all EVS.
      3. From the second list, select the cluster node to which to migrate all EVS.
      4. Click Migrate.
    • To migrate an EVS to a cluster node:
      1. Select Migrate EVS ___ to cluster node ___.
      2. From the first list, select the cluster node to migrate.
      3. From the second list, select the cluster node to which the EVS will be migrated.
      4. Click Migrate.
    • To save a preferred EVS to cluster node mapping:
      NoteSaving the current EVS-to-cluster configuration as the preferred mapping helps when restoring EVSs to cluster nodes. For example, if a failed cluster node is being restored, the preferred mapping can be used to easily restore the original cluster configuration.
      1. Migrate the EVS between the cluster nodes until the preferred mapping has been defined. The current mapping will be displayed in the Current EVS list box.
      2. To save current EVS-to-cluster node mapping, click Save in Save current EVS mapping as the preferred mapping. The preferred mapping will then be displayed in the Current EVS column.
    • To migrate all EVSs to a preferred mapping, click Migrate in Migrate all EVS to their preferred mapping.