Smaws_Client_Neptune.FailoverDBClusterForces a failover for a DB cluster.
A failover for a DB cluster promotes one of the Read Replicas (read-only instances) in the DB cluster to be the primary instance (the cluster writer).
Amazon Neptune will automatically fail over to a Read Replica, if one exists, when the primary instance fails. You can force a failover when you want to simulate a failure of a primary instance for testing. Because each instance in a DB cluster has its own endpoint address, you will need to clean up and re-establish any existing connections that use those endpoint addresses when the failover is complete.
val error_to_string :
[ Smaws_Lib.Protocols.AwsQuery.error
| `DBClusterNotFoundFault of Types.db_cluster_not_found_fault
| `InvalidDBClusterStateFault of Types.invalid_db_cluster_state_fault
| `InvalidDBInstanceStateFault of Types.invalid_db_instance_state_fault ] ->
stringval request :
'http_type Smaws_Lib.Context.t ->
Types.failover_db_cluster_message ->
(Types.failover_db_cluster_result,
[> Smaws_Lib.Protocols.AwsQuery.error
| `DBClusterNotFoundFault of Types.db_cluster_not_found_fault
| `InvalidDBClusterStateFault of Types.invalid_db_cluster_state_fault
| `InvalidDBInstanceStateFault of Types.invalid_db_instance_state_fault ])
Stdlib.resultval request_with_metadata :
'http_type Smaws_Lib.Context.t ->
Types.failover_db_cluster_message ->
(Types.failover_db_cluster_result Smaws_Lib.Response.t,
[> Smaws_Lib.Protocols.AwsQuery.error
| `DBClusterNotFoundFault of Types.db_cluster_not_found_fault
| `InvalidDBClusterStateFault of Types.invalid_db_cluster_state_fault
| `InvalidDBInstanceStateFault of Types.invalid_db_instance_state_fault ]
* Smaws_Lib.Response.metadata)
Stdlib.result