This topic describes how to create a database link from a PolarDB-O cluster to a PolarDB-O cluster.
For more information about how to create a database link from a PolarDB-O cluster to a user-created Oracle database hosted on an Elastic Compute Service (ECS) instance, see Create a database link from PolarDB-O to Oracle.
Prerequisites
- The source database and the destination database belong to the same Alibaba Cloud account.
- The source database and the destination database are in the same region.
- The kernel version of the PolarDB-O cluster is the latest kernel version. For information about how to upgrade the kernel version, see Upgrade the minor version.
Notes
You can create a maximum of 10 database links for each PolarDB-O cluster. Each database link consumes one database link quota of both the source cluster and the destination cluster.
Procedure
Related operations
API | Description |
---|---|
CreateDBLink | Creates a database link for a PolarDB-O cluster. |
DescribeDBLinks | Queries the database link information of a PolarDB-O cluster. |