View and modify the parameter configurations of a data synchronization task

This topic describes how to view and modify the parameter configurations of a data synchronization task in OceanBase Migration Service (OMS).

View parameter configurations

You can view the parameter configurations of a data synchronization task in the Running, Modifying, Integrating, Completed, Ending, or Ended state.

1. Log in to the OMS console.

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

3. On the Synchronization Tasks page, choose ... > Settings next to the target task.

   

   You can also click the name of the target task to go to its details page and then choose ... > Settings in the upper-right corner.

   

4. On the Settings page, view the parameter configurations of the current task.

Modify parameter configurations

You can modify the parameter configurations of a data synchronization task in the Not Started, Stopped, or Failed state.

1. Log in to the OMS console.

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

3. On the Synchronization Tasks page, choose ... > Modify Parameters next to the target task.

   

   You can also click the name of the target task to go to its details page and then choose ... > Modify Parameters in the upper-right corner.

   

4. In the Modify Parameters panel, modify the parameter configurations as needed.

   • Full synchronization

     The following parameters are displayed only if you have selected Full Synchronization in the Select Synchronization Type step.

     

     Parameter	Description
     Full Synchronization Rate Limit	You can choose whether to limit the full synchronization rate as needed. If you choose to limit it, you must specify the RPS and BPS. The RPS specifies the maximum rows of data synchronized to the target database per second during full synchronization, and the BPS specifies the maximum amount of data in bytes synchronized to the target database per second during full synchronization. Note The RPS and BPS values specified here are only for throttling. The actual full synchronization performance is subject to factors such as the settings of the source and target databases and the instance specifications.
     Full Synchronization Resource Configuration	You can select Small, Medium, or Large to use the corresponding default values of Read Concurrency, Write Concurrency, and Memory. You can also customize the resource configurations for full synchronization. By setting the resource configuration for the Full-Import component, you can limit the resource consumption of a task in the full synchronization stage. Notice In the case of custom configurations, the minimum value is 1, and only integers are supported.

   • Incremental synchronization

     The following parameters are displayed only if you have selected Incremental Synchronization in the Select Synchronization Type step.

     

     Parameter	Description
     Incremental Synchronization Rate Limit	You can choose whether to limit the incremental synchronization rate as needed. If you choose to limit it, you must specify the RPS and BPS. The RPS specifies the maximum rows of data synchronized to the target database per second during incremental synchronization, and the BPS specifies the maximum amount of data in bytes synchronized to the target database per second during incremental synchronization. Note The RPS and BPS values specified here are only for throttling. The actual incremental synchronization performance is subject to factors such as the settings of the source and target databases and the instance specifications.
     Incremental Log Pull Resource Configuration	You can select Small, Medium, or Large to use the corresponding default value of Memory. You can also customize the resource configurations for incremental log pull. By setting the resource configuration for the Store component, you can limit the resource consumption of a task in log pull in the incremental synchronization stage. Notice In the case of custom configurations, the minimum value is 1, and only integers are supported.
     Incremental Data Write Resource Configuration	You can select Small, Medium, or Large to use the corresponding default values of Write Concurrency and Memory. You can also customize the resource configurations for incremental data writes. By setting the resource configuration for the Incr-Sync component, you can limit the resource consumption of a task in data writes in the incremental synchronization stage. Notice In the case of custom configurations, the minimum value is 1, and only integers are supported.
     Incremental Record Retention Duration	The duration that incremental parsed files are cached in OMS. A longer retention duration results in more disk space occupied by the Store component.
     Incremental Synchronization	Incremental Synchronization supports the DML Synchronization and DDL Synchronization options. The supported DML operations are INSERT, DELETE, and UPDATE. Select the options as needed. For more information, see Configure DDL/DML synchronization.
     Incremental Synchronization Start Timestamp	If you have selected Full Migration as the migration type, this parameter is not displayed. If you have selected Incremental Synchronization but not Full Migration, specify a point in time after which the data is to be synchronized. The default value is the current system time. For more information, see Set an incremental synchronization timestamp.

5. Click OK.