Amazon MemoryDB for Redis

In-memory metadata for MemoryDB clusters, users, ACLs, snapshots, subnet groups, and parameter groups. AWSim does not actually back the cluster with a Redis process — Status flips to available immediately after CreateCluster and the synthesized ClusterEndpoint resolves to a fake hostname.

Endpoint: http://localhost:4566Signing name: memorydbProtocol: AWS-JSON 1.1 (X-Amz-Target prefix: AmazonMemoryDB)

Operations

Group	Operations
Clusters	CreateCluster, DescribeClusters, UpdateCluster, DeleteCluster
Users	CreateUser, DescribeUsers, UpdateUser, DeleteUser
ACLs	CreateACL, DescribeACLs, DeleteACL
Subnet groups	CreateSubnetGroup, DescribeSubnetGroups
Parameter groups	CreateParameterGroup, DescribeParameterGroups
Snapshots	CreateSnapshot, DescribeSnapshots, DeleteSnapshot

Behavior notes

• Default engine version is 7.1; default port 6379. TLSEnabled defaults to true.
• Duplicate ClusterName / UserName / ACLName returns the AWS-style *AlreadyExistsFault error.
• The synthesized ClusterEndpoint.Address follows clustercfg.{ClusterName}.{region}.memorydb.amazonaws.com.
• Per-shard sharding is metadata-only — Shards: [] is returned.