Modifying SmartTier Information

Prerequisites

At least one LUN has been created.

Context

Super administrators, administrators, and SAN resource administrators can modify SmartTier information.

Procedure

1. Log in to DeviceManager.
2. Go to the LUN page.

   The operation path varies with user types:

   • System user: Click vStore, select the desired vStore, and click Details to go to the vStore view. Choose Provisioning > LUN.
   • vStore user: In the vStore view, choose Provisioning > LUN.

3. Select the LUN whose properties you want to modify and click Properties.

   The Properties of LUN dialog box is displayed.

4. Modify the SmartTier information.
   1. In the Properties of LUN dialog box, click the SmartTier tab.
   2. In SmartTier Policy, select a policy.

      The SmartTier policies include:

      • Automatic relocation

        SmartTier relocates data based on the ranking order of data blocks and activity levels of LUNs in a storage pool. Automatic relocation relies on the analysis result from the I/O monitoring. Thus I/O monitoring must be enabled and the service monitoring period must be set before automatic relocation.

      • Relocation to high-performance tier

        The relocation to high-performance tier policy is recommended for the applications (such as OLTP databases) sensitive to response time, IOPS, and bandwidth. This policy preferentially promotes data blocks to the high performance tier and the performance tier. If the capacity of the data blocks to be relocated is larger than the capacity of the high performance tier (or performance tier), only data blocks with the most activities are promoted to the high performance tier (or the performance tier).

      • Relocation to low-performance tier

        The relocation to low-performance tier policy is recommended for applications (such as file sharing) insensitive to performance requirements. This policy preferentially demotes data blocks to the performance tier and the capacity tier, regardless of the activity levels of these data blocks.

      • No relocation

        The no relocation policy does not relocate data blocks among storage tiers, and data can be relocated only when the data relocation policy is changed.

        You are advised to set or adjust the data relocation policy based on LUNs' performance requirements, and take the initial capacity allocation policy into consideration to set an optimal data relocation policy.

5. Click OK.

   The Execution Result dialog box is displayed, indicating that the operation succeeded.

6. Click Close to finish modifying.