Adding a WFS/HNAS data migration policy

Data Migrator Administration Guide for Hitachi NAS Platform

Version
14.8.x
Audience
anonymous
Part Number
MK-92HNAS005-31

You can add a WFS/HNAS data migration policy in the NAS Manager.

  1. Navigate to and then click add under the Policies section to display the Add Data Migration Policy page.


    The following table describes the fields in this page:

    Item Description
    Policy Identification This section allows you to specify a name to identify the migration policy.
    Name Name for the new data migration policy.
    Migration Path This section allows you to specify the data migration path to be used by the migration (or reverse migration) policy.
    Migrate Data When creating a migration policy, this section displays the data migration source and target information:
    • Primary EVS/File System: Displays the name of the EVS and file system for primary storage (the migration source).
    • Virtual Volumes: If a virtual volume has been selected as primary storage, the virtual volume will be displayed.
    • Secondary Target Type: Displays WFS/HNAS to represent the migration type.
    • Secondary File System: Displays the name of the file system on secondary storage that will host the migrated data (the migration target).
    Reverse Migrate

    When creating a reverse migration policy, this section displays the destination for the reverse migration (the original data migration source and target information). Files that have been migrated from the original source to secondary storage will be returned to this EVS and File System when the reverse migration policy criteria are met.

    change... Opens the Select a Path page, which enables you to select a different path.
    Data Migration Paths Opens the Data Migration Paths page, which allows you to create data migration paths.
    Pre-Conditions

    This section allows you to specify the rules (the criteria) that the files must match/meet in order to be migrated (or reverse migrated) according to this policy.

    Available WFS/HNAS Rules Rules with specific threshold limits are displayed here. This list of rules define the set of conditions which trigger the migration/reverse migration. You can:
    • Add a Pre-condition to the Selected Rules list by selecting it and clicking the right arrow (>).
    • Remove a rule from the Selected Rules list by selecting it and clicking the left arrow (<).

    This policy will be run either by a defined schedule, or when started manually. Once the policy is run, the threshold specifies when the selected rules are applied. You can specify that the selected rules will be applied when either of the following conditions are met:

    • When the primary file system's free space falls below X% (set the percentage level for the condition).
    • When other conditions are not met. These conditions are defined in the selected rule(s).

    After selecting rules and the threshold, save the policy by clicking OK.

    Selected WFS/HNAS Rules

    Displays the rules containing the criteria/conditions to be used to determine if a file should be migrated. The criteria in the rules are applied when the threshold (the when condition specified in the Available Rules section) is met.

    Data Migration Rules Opens the Data Migration Rules page, which allows you to create rules.
  2. Add a descriptive name for the policy. The name should make it easy to recognize the purpose of the policy.
  3. Select a migration path. You can specify that the policy:
    • Migrate Data: To move the data from the primary file system to the secondary file system when the criteria defined in the Selected Rules are met.

    • Reverse Migrate: To move the data from the secondary file system back to the primary file system when the criteria defined in the Selected Rules are met.
  4. Select one of the migration paths you created on the Data Migration Paths page. The path specifies the source and the destination of the migration. For a:
    • Migration operation, the source is the primary file system and the destination is the secondary file system.

    • Reverse migration operation, the source is any secondary file system and the destination of the revers migration is the primary file system (the original source).

      When a file is migrated, a CVL (cross volume link) or an XVL (external volume link) is left in the primary file system to point to the file in the secondary file system.

    If the currently displayed path is not the one you want this policy to use, click change to display the Select a Path page:



    Select the path you want the policy to use, then click OK.

    Note: If you are adding a policy to perform a test migration, a valid migration path is required, but it may be a real path involving primary and secondary file systems, or a “test-only” path in which a secondary file system does not exist.
  5. Select the rules and specify when the rules will be applied. Using the Pre-conditions section, specify the rules that contain the criteria that must be met in order to migrate the file. Also, choose the threshold that triggers the migration of the file.
  6. Verify your settings, then click OK to save the policy as defined, or cancel to return to the Data Migration page.