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Wang , Deng Ke 5523220f09 DRS UMN 20221102 version 
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Wang , Deng Ke <wangdengke2@huawei.com>
Co-committed-by: Wang , Deng Ke <wangdengke2@huawei.com>
2022-12-08 10:16:13 +00:00

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Can Online DDL Tools Be Used for Real-time Synchronization?

During table-level incremental synchronization from MySQL to MySQL, you can use Online DDL tools to add or delete columns. Pay attention to the following when using Online DDL:

  • The DRS synchronization mechanism conflicts with the tool. Do not select Incremental DDLs when selecting synchronization objects on the Set Synchronization Task page.
  • Before using Online DDL tools to add columns, perform the corresponding operations in the destination database and then in the source database.
  • When using Online DDL tools to delete columns, perform the corresponding operation in the source database and then in the destination database.

Common online DDL tools:

  • pt-online-schema-change
  • gh-ost