This topic describes how to create a database link from a PolarDB for Oracle cluster to a PolarDB for Oracle cluster.
For more information about how to create a database link from a PolarDB for Oracle cluster to a user-created Oracle database hosted on an Elastic Compute Service (ECS) instance, see Create a database link from to PostgreSQL.
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 for Oracle 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 for Oracle 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 for Oracle cluster. |
DescribeDBLinks | Queries the database link information of a PolarDB for Oracle cluster. |