View and modify migration objects

This topic describes how to view and modify the objects of a configured data synchronization task by using OceanBase Migration Service (OMS) Community Edition.

Background information

If the limitations are met, you can add or remove migration objects of a data migration task during migration. The changes made during the running of the task will be recorded. After an object addition task is completed, it will be integrated with the original task that is associated. After the task is integrated with the original task, the original task runs normally and the object addition task is automatically released.

Limitations

• For a data migration task whose migration objects are selected only by using the Specify Objects option, you can modify its migration objects.

• For a data migration task in the Not Started , Running , or Stopped state, you can add or remove its migration objects.

• For a data migration task in the Failed state, you can only remove its migration objects.

• For a data migration task in the Modifying or Integrating state, you cannot modify its migration objects again. |

• If a data migration task is in the Stopped or Failed state in the Full Migration or Incremental Synchronization step, you can only remove migration objects.

• In the Reverse Incremental Migration step of a data migration task, you can only remove its migration objects.

• For a data migration task in the active-active disaster recovery scenario, you cannot add or remove migration objects.

View migration objects

1. Log on to the console of OMS Community Edition.

2. In the left-side navigation pane, click Data Migration .

3. On the Data Migration page, click the name of the target task to go to its details page.

4. Click View Objects in the upper-right corner and view information on the Migration Objects and Object Modifications tabs.

   • The Migration Objects tab displays the migration objects of the current task. You can click Modify Object and then select Add Object or Remove Objects .

   • The Object Modifications tab displays the IDs, types, status, and occurrence time of all object modifications.

Add migration tasks

1. On the details page of the target task, click View Objects in the upper-right corner.

2. In the View Objects dialog box, choose Modify Objects > Add Objects .

3. In the Source Objects section on the left of the Add Objects dialog box, select the objects to be migrated and click > to add them to the list on the right. You can select tables and views of one or more databases as the migration objects.

   After you select the migration objects to add, you can perform operations such as renaming objects, setting row-based filtering, and viewing column information.

   Notice

   • By default, the added objects will inherit all configurations of the data migration task. If you abort the object addition operation, you must manually delete the objects that have been added to the destination database.

   • If you specified the schema name or DB name for the source data source, you can add only the migration objects under the specified schema name or database name.

4. Then, click Next .

5. The system automatically performs a precheck on the added migration objects. After the added migration objects pass all check items, click Save .

6. Confirm the information and click OK in the dialog box that appears.

   • For a paused or failed data migration task, you can cancel the operation and modify the migration objects again. The added migration objects will be migrated to the destination database only after the data migration task returns to normal.

   • If you add migration objects for a running data migration task, after you click Save, the added migration objects will be immediately migrated to the destination database.

   After the object addition operation begins, records will be generated on the page that appears after you choose View Objects > Object Modifications . You can view details of the records on this page. The status of object addition records can be Pending , Canceled , Modifying , Running , Aborted , Integrating , Succeeded , or Failed . The operations that you can perform on an object addition record and the status of the original task vary with the status of the object addition record.

   Note

   If the original data synchronization task is in the Not Started state, a modification record in the Successful state will be generated for an object addition operation. If the original data synchronization task is in the Paused state, a modification record in the Pending state will be generated for an object addition operation.

   The status of an object addition record changes only when the original data synchronization task is in the Running state, and the status of the original task changes along with the status of the object addition record. The following table describes more information.

   Status of an object addition record	Supported operations	Status of the original task
   Pending	View details and cancel.	Running
   Canceled	N/A	Running
   Modifying	N/A	Modifying
   Running	View details and abort.	Modifying
   Aborted	View details.	Running
   Integrating	View details.	Integrating
   Succeeded	View details.	Running
   Failed	View details and retry. You can also click View Cause to go to the details page of the task and view the cause of the failure.	Modifying/Integrating

Remove migration objects

1. On the details page of the target task, click View Objects in the upper-right corner.

2. In the View Objects dialog box, choose Modify Objects > Remove Objects .

3. In the Remove Objects dialog box, move the pointer over a migration object that you want to remove in the Target Object section on the right and click Remove .

4. In the Remove Objects dialog box, click Remove .

5. In the confirmation dialog box that appears, confirm the migration object to remove and click OK .

   If the task is in the paused, failed, or running state, after you click OK, the migration object is immediately removed from the destination database.

   Notice

   • A removed migration object cannot be recovered, so proceed with caution.

   • The final result of the object removal operation is either succeeded or failed for all migration objects.

   After the object removal operation begins, records will be generated on the page displayed after you choose View Objects > Object Modifications . You can view the details of the records on this page. The status of object removal records can be Pending , Canceled , Modifying, Succeeded , or Failed . The operations that you can perform on an object removal record and the status of the original task vary with the status of the object removal record.

   Status of an object removal record	Supported operations	Status of the original task
   Pending	View details and cancel.	Running
   Canceled	N/A	Running
   Modifying	N/A	Modifying
   Succeeded	View details.	Running
   Failed	View details and retry. You can also click View Causes to go to the details page of the task and view the cause of the failure.	Modifying