This topic describes how to use OceanBase Migration Service (OMS) Community Edition to migrate data from a Redis database to an OBKV Redis database.
Limitations
At present, OMS Community Edition supports only full data migration from a Redis database to an OBKV Redis database.
Redis V2.8.0 and later are supported.
Considerations
If the destination OBKV Redis database does not support the data types of source fields, OMS Community Edition uniformly converts the fields into strings.
If a full data migration task is interrupted, duplicate list data appears after you restart the task.
Procedure
Create a data migration task.
Log on to the console of OMS Community Edition.
In the left-side navigation pane, click Data Migration.
On the Data Migration page, click Create Migration Task in the upper-right corner.
On the Select Source and Destination page, configure the parameters.
Parameter Description Data Migration Task Name We recommend that you set it to a combination of digits and letters. It must not contain any spaces and cannot exceed 64 characters in length. Tag (Optional) Click the field and select a tag from the drop-down list. You can also click Manage Tags to create, modify, and delete tags. For more information, see Use tags to manage data migration tasks. Source If you have created a Redis data source, select it from the drop-down list. If not, click New Data Source in the drop-down list and create one in the dialog box that appears on the right. For more information about the parameters, see Create a Redis data source. Destination If you have created an OBKV Redis data source, select it from the drop-down list. If not, click New Data Source in the drop-down list and create one in the dialog box that appears on the right. Click Next. On the Select Migration Type page, select Full Data Migration.
After a full data migration task is started, OMS Community Edition migrates the existing data of tables in the source database to corresponding tables in the destination database.
Click Next. On the Select Migration Objects page, select the migration objects and migration scope.
You can select Specify Objects or Match Rules to specify the migration objects.
Select Specify Objects. Then select the objects to be migrated on the left and click > to add them to the list on the right.
Notice
The names of tables to be migrated, as well as the names of columns in the tables, must not contain Chinese characters.
If a database or table name contains double dollar signs ("$$"), you cannot create the migration task.
OMS Community Edition also allows you to rename objects, set row filters, view column information, and remove a single migration object or all migration objects.
Operation Description Rename objects OMS Community Edition allows you to rename migration objects. For more information, see Rename a database table.
Note that the new table name must also be in the format ofTableName$ColumnFamilyName.Configure settings OMS Community Edition allows you to filter rows by using WHEREconditions. For more information, see Use SQL conditions to filter data.
You can also view column information of the migration objects in the View Column section.Remove one or all objects OMS Community Edition allows you to remove a single object or all objects to be migrated to the destination database during data mapping. - To remove a single migration object:
In the list on the right of the Specify Migration Scope section, move the pointer over the target object and click Remove. - To remove all migration objects:
In the list on the right of the Specify Migration Scope section, click Remove All in the upper-right corner. In the dialog box that appears, click OK.
Select Match Rules. For more information, see Configure matching rules for migration objects.
Click Next. On the Migration Options page, configure the parameters for full migration.
Parameter Description Concurrency Speed Valid values: Stable, Normal, Fast, and Custom. The amount of resources to be consumed by a full data migration task varies based on the migration performance. If you select Custom, you can set Read Concurrency, Write Concurrency, and JVM Memory as needed. To view or modify parameters of the full migration component Checker-Full, click Configuration Details in the upper-right corner of the Full Migration section. For more information about the parameters, see Component parameters.
Click Precheck to start a precheck on the data migration task.
During the precheck, OMS Community Edition checks the read and write privileges of the database users and the network connectivity of the databases. A data migration task can be started only after it passes all check items. If an error is returned during the precheck, you can perform the following operations:
Identify and troubleshoot the problem and then perform the precheck again.
Click Skip in the Actions column of the failed precheck item. In the dialog box that prompts the consequences of the operation, click OK.
Click Start Task. If you do not need to start the task now, click Save to go to the details page of the data migration task. You can start the task later as needed.
OMS Community Edition allows you to modify the migration objects when the data migration task is running. For more information, see View and modify migration objects. After the data migration task is started, it is executed based on the selected migration types. For more information, see the View migration details section in the View details of a data migration task topic.