- "documentation":"<p>The name of the DB parameter group to associate with this read replica DB instance.</p> <p>For the Db2 DB engine, if your source DB instance uses the Bring Your Own License model, then a custom parameter group must be associated with the replica. For a same Amazon Web Services Region replica, if you don't specify a custom parameter group, Amazon RDS associates the custom parameter group associated with the source DB instance. For a cross-Region replica, you must specify a custom parameter group. This custom parameter group must include your IBM Site ID and IBM Customer ID. For more information, see <a href=\"https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/db2-licensing.html#db2-prereqs-ibm-info\"> IBM IDs for Bring Your Own License for Db2</a>. </p> <p>For Single-AZ or Multi-AZ DB instance read replica instances, if you don't specify a value for <code>DBParameterGroupName</code>, then Amazon RDS uses the <code>DBParameterGroup</code> of the source DB instance for a same Region read replica, or the default <code>DBParameterGroup</code> for the specified DB engine for a cross-Region read replica.</p> <p>For Multi-AZ DB cluster same Region read replica instances, if you don't specify a value for <code>DBParameterGroupName</code>, then Amazon RDS uses the default <code>DBParameterGroup</code>.</p> <p>Specifying a parameter group for this operation is only supported for MySQL DB instances for cross-Region read replicas, for Multi-AZ DB cluster read replica instances, for Db2 DB instances, and for Oracle DB instances. It isn't supported for MySQL DB instances for same Region read replicas or for RDS Custom.</p> <p>Constraints:</p> <ul> <li> <p>Must be 1 to 255 letters, numbers, or hyphens.</p> </li> <li> <p>First character must be a letter.</p> </li> <li> <p>Can't end with a hyphen or contain two consecutive hyphens.</p> </li> </ul>"
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