Creating a SmartMigration Task

Prerequisites

• The storage system has available source LUNs and target LUNs, and those LUNs are normal.
• The target LUN capacity is not smaller than the source LUN capacity, and the target LUN has not been mapped.
• No value-added services are running on the source LUNs or target LUNs.

Precautions

• LUNs that have been mapped to the application server cannot be configured as target LUNs in any SmartMigration task.
• LUNs that are being migrated cannot be configured as source LUNs or target LUNs in another SmartMigration task.

Procedure

1. Choose Services > Resource Tuning > SmartMigration.
2. Click Create.

   The Create SmartMigration Task dialog box is displayed.

3. Specify source LUNs for data migration.
   1. In Available LUNs, select one or more LUNs. Then click to add them to Selected LUNs.
   2. Click Next.

4. Configure the SmartMigration pair. Establish a pair relationship between the source LUN and target LUN.
   1. You can create the target LUN in either Manual or Automatic mode.
      • Automatic: The system automatically creates a target LUN that matches the source LUN.
        1. In the Pair Creation area, select the Automatic mode.
        2. Set the properties of the target LUN. Table 3-3 lists related parameters.
           Table 3-3 Parameters of the target LUN

           Parameter	Description
           Target Storage Pool	Storage pool to which the target LUN belongs.
           Name Prefix	Prefix of the target LUN name.
           Application Type	Click Advanced and set the application type of the target LUN. The following preset application types are provided for typical applications: Default, Oracle_OLAP, Oracle_OLTP, Oracle_OLAP&OLTP, SQL_Server_OLAP, SQL_Server_OLTP, SQL_Server_OLAP&OLTP, SAP_HANA, Vmware_VDI, Hyper-V_VDI, and FusionAccess_VDI NOTE: For these preset application types, Application Request Size have been configured. Application Request Size is 32 KB for Oracle_OLAP and SQL_Server_OLAP, and 8 KB for the other preset application types. After you have set an application type for a LUN, you are unable to change it in follow-up operations. If the application type configured for a LUN does not match the actual I/O model, the LUN performance may deteriorate.

      • Manual: You must manually select a target LUN that matches the source LUN.
        1. In the Pair Creation area, select the Manual mode.
        2. Click Configure.

           The Configure Pair page is displayed.

        3. Select the source and target LUNs and click Add to Pair.

           The pair relationship between the source and target LUNs is created and displayed in the SmartMigration Pairs area.

           You can click Remove to remove a pair from the pair list.

        4. Click OK.
   2. Set SmartMigration properties. Table 3-4 lists related parameters.
      Table 3-4 SmartMigration parameters

      Parameter	Description
      Splitting Mode	Splitting mode of SmartMigration pairs. Possible values are Automatic and Manual. Automatic After data synchronization is complete, the system automatically splits the pair. After the splitting is complete, the migration is complete. Manual After data synchronization is complete, you need to manually split the pair. After the splitting is complete, the migration is complete.
      Default Migration Rate	Data migration rate of SmartMigration. Possible values are Low, Medium, High, Highest, and Custom. Low When the migration rate is set to low, the migration will take a long time duration. This value is recommended when the service load is heavy. The migration rate ranges from 0 MB/s to 5 MB/s. Medium When the migration rate is set to medium, the migration will take a relatively short time duration. This value is recommended when the service load is relatively heavy. The migration rate ranges from 10 MB/s to 20 MB/s. High When the migration rate is set to high, the migration will take a short time duration. This value is recommended when the service load is relatively light. The migration rate ranges from 20 MB/s to 70 MB/s. Highest When the migration rate is set to highest, the migration will take the shortest time duration. This value is recommended when the service load is light. The migration rate is normally above 100 MB/s. Custom You can set the migration rate as required. The value ranges from 1 MB/s to 1024 MB/s. NOTE: The migration rate is affected by the LUN read and write performance and the link bandwidth. Higher migration rates impose greater impact on host service performance. If you choose Highest, the SmartMigration pair may be interrupted due to heavy service load. You are advised to use the highest rate when the host service is not running.

   3. (Optional) Enable Specify Time to specify the migration rate for specified time.
      • The migration rate for specified time applies to only the specified period. The migration rate of other periods remains the default. This parameter takes effect only when data is being migrated during the period.

        Suppose that, from 2020-03-08 to 2020-04-24, you want to migrate data at a high rate for one hour starting from 23:00 and at the default rate in other periods every day. The parameter settings are as follows:

        • Date: 2020-03-08 to 2020-04-24
        • Start Time: 23:00
        • Duration: 1 hours 0 minutes
        • Migration Rate for Specified Time: High
      • For details about Migration Rate for Specified Time, see the Default Migration Rate parameter.
   4. Click Next.

5. Click OK.

   Confirm your operation as prompted.