**To describe orderable replication instances** The following ``describe-orderable-replication-instances`` example lists replication instance types that you can order. :: aws dms describe-orderable-replication-instances Output:: { "OrderableReplicationInstances": [ { "EngineVersion": "3.3.2", "ReplicationInstanceClass": "dms.c4.2xlarge", "StorageType": "gp2", "MinAllocatedStorage": 5, "MaxAllocatedStorage": 6144, "DefaultAllocatedStorage": 100, "IncludedAllocatedStorage": 100, "AvailabilityZones": [ "us-east-1a", "us-east-1b", "us-east-1c", "us-east-1d", "us-east-1e", "us-east-1f" ] }, { "EngineVersion": "3.3.2", "ReplicationInstanceClass": "dms.c4.4xlarge", "StorageType": "gp2", "MinAllocatedStorage": 5, "MaxAllocatedStorage": 6144, "DefaultAllocatedStorage": 100, "IncludedAllocatedStorage": 100, "AvailabilityZones": [ "us-east-1a", "us-east-1b", "us-east-1c", "us-east-1d", "us-east-1e", "us-east-1f" ] }, ...remaining output omitted... } For more information, see `Working with an AWS DMS Replication Instance <https://docs.aws.amazon.com/dms/latest/userguide/CHAP_ReplicationInstance.html>`__ in the *AWS Database Migration Service User Guide*.