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ETERNUS SF Storage Cruiser V16.5 Operation Guide for Optimization Function
FUJITSU Storage

3.4.2 Change of Tiering Policy

To change the operation of the registered Tiering policy, change the definition of the Tiering policy.
Refer to "Change Tiering Policy" in the ETERNUS SF Web Console Guide for information on how to change a Tiering policy.

Point

  • It is not possible to change the definition of multiple Tiering policies at once. When changing the definition of multiple Tiering policies, make changes to the each Tiering policy at a time.

  • Configure Evaluation Excluded Day previous from the 32nd is automatically deleted on the day when the Tiering policy was changed when the Configure Evaluation Excluded Day is set to the Tiering policy of the operational object regardless of whether Configure Evaluation Excluded Day of the Tiering policy is enabled or disabled. The 32nd is days in which a day was added the 31st that is the maximum Evaluation Period in consideration of summer time.

  • When the Tiering policy allocated in the Tier pool where the Automated Storage Tiering begins is changed, the collected access status data might be deleted according to the value of the Execution Mode of the Tiering policy.

    Table 3.1 Value of Execution Mode

    Before Change

    After Change

    Auto

    Semi-Auto

    Manual

    Auto

    Case2

    Case2

    Case1

    Semi-Auto

    Case2

    Case2

    Case1

    Manual

    Case1

    Case1

    Case2

    Case1

    Regardless of change of other items of the Tiering policy, the access status data collected for Tier pools which are using the Tiering policy is deleted and the collection of new access status data is begun. In this case, the evaluation period is a period from the change of the Tiering policy.

    Case2

    If any of the following items of the Tiering policy is changed, the access status data collected for Tier pools which are using the Tiering policy is deleted and the collection of new access status data is begun. In this case, the evaluation period is a period from the change of the Tiering policy.

    • Evaluation Period

    • Evaluation Standard

    • Automated Storage Tiering Execution Time

    • Time of the Day subject to Evaluation

    • Evaluation Day (*1)

    *1: If only the value of Evaluated from initial specified day (Evaluated despite insufficient evaluation period) is changed, this is not applied.