The engine of TDSQL-C for MySQL allows deploying a cluster across AZs. A multi-AZ cluster has superior disaster recovery capabilities than a single-AZ cluster and can protect your database against database instance failures, AZ outages, and even IDC-level failures.
The multi-AZ deployment scheme of TDSQL-C for MySQL guarantees the high availability and failover capability of database instances by combining multiple AZs into a single "multi-AZ".
|Supported Region||Supported AZ|
|North China (Beijing)||Beijing Zone 5|
|Beijing Zone 7|
|South China (Guangzhou)||Guangzhou Zone 4|
|Guangzhou Zone 6|
|East China (Shanghai)||Shanghai Zone 2|
|Shanghai Zone 4|
You can create a cluster in multi-AZ deployment mode in the TDSQL-C for MySQL console. Your existing single-AZ clusters will also be upgraded to the multi-AZ mode. The upgrade will be automatically completed through online data migration without affecting your business. For more information, see Setting Multi-AZ Deployment.
There are no additional fees for the multi-AZ feature for the time being.
Currently, single-AZ clusters can also be upgraded to multi-AZ clusters for free.