SmartMigration achieves full replication of source LUN data to the target LUN. After the replication is complete, the target LUN takes over all services from the source LUN.
Prerequisites
- The storage system has available source and target LUNs, and those LUNs are normal.
- The target LUN's capacity is not smaller than the source LUN's capacity, and the target LUN has not been mapped.
- No value-added services are running on the source LUN or target LUN.
Precautions
- LUNs that have been mapped to an application server cannot be configured as target LUNs in any SmartMigration task.
- LUNs that are being migrated in a SmartMigration task cannot be configured as source LUNs or target LUNs in another SmartMigration task.
Procedure
- Choose Services > Resource Tuning > SmartMigration.
- Click Create.
The Create SmartMigration Task page is displayed.
- Specify source LUNs for data migration.
- In Available LUNs, select one or more desired LUNs, and they are added to Selected LUNs automatically.
- Click Next.
- Establish pair relationships between the source LUNs and target LUNs and configure the SmartMigration pairs.
- You can create target LUNs in either Manual or Automatic mode.
- Automatic: The system automatically creates target LUNs that match the source LUNs.
- In the Pair Creation area, select the Automatic mode.
- Set the properties of the target LUNs. Table 1 describes the parameters.
Table 1 Target LUN parameters Parameter
Description
Target Storage Pool
Storage pool to which the target LUNs belong.
Name Prefix
Prefix of the target LUN names.
Application Type
Application type of the target LUNs. The options are Same as source LUN and Custom.
If you select Same as source LUN, the system will create target LUNs with the same application types as those of the source LUNs. If you select Custom, you need to manually select an application type for the target LUNs, and the application type of all target LUNs created will be set to this value.
Under Custom, the storage system provides the following preset application types for typical application scenarios: 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_VDINOTE:- 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.
- Application Type is hidden. To display hidden parameters, select Advanced.
- Manual: You must manually select a target LUN that matches a source LUN.
- In the Pair Creation area, select the Manual mode.
- Click Configure.
The Configure Pair page is displayed.
- Select the desired 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.
- Click OK.
- Automatic: The system automatically creates target LUNs that match the source LUNs.
- Set SmartMigration task properties. Table 2 describes the parameters.
Table 2 SmartMigration task 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 pairs in the SmartMigration task. After the splitting is complete, the migration is complete.
- Manual
After data synchronization is complete, you need to manually split the pairs in the SmartMigration task. After the splitting is complete, the migration is complete.
Default Migration Rate
Data migration rate of the SmartMigration task. Possible values are Low, Medium, High, Highest, and Custom.
- Low
Migration takes a relatively long period of time. This value is used when the service load is heavy.
The rate is normally from 0 MB/s to 5 MB/s.
- Medium
Migration takes a relatively short period of time. This value is used when the service load is relatively heavy.
The rate is normally from 10 MB/s to 20 MB/s.
- High
Migration takes a short period of time. This value is used when the service load is relatively light.
The rate is normally from 20 MB/s to 70 MB/s.
- Highest
Migration takes the shortest period of time. This value is used when the service load is light.
The 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 task may be interrupted due to heavy service load. You are advised to use the highest rate when the host service is not running.
- Automatic
- (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.
- 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.
- Click Next.
- You can create target LUNs in either Manual or Automatic mode.
- Click OK.
Confirm your operation as prompted.