To remove one or more nodes from the cluster

The following decrease-replication-factor example decreases the number of nodes in the specified DAX cluster to one.

aws dax decrease-replication-factor \
    --cluster-name daxcluster \
    --new-replication-factor 1

Output:

{
    "Cluster": {
        "ClusterName": "daxcluster",
        "ClusterArn": "arn:aws:dax:us-west-2:123456789012:cache/daxcluster",
        "TotalNodes": 3,
        "ActiveNodes": 3,
        "NodeType": "dax.r4.large",
        "Status": "modifying",
        "ClusterDiscoveryEndpoint": {
            "Address": "daxcluster.ey3o9d.clustercfg.dax.usw2.cache.amazonaws.com",
            "Port": 8111
        },
        "Nodes": [
            {
                "NodeId": "daxcluster-a",
                "Endpoint": {
                    "Address": "daxcluster-a.ey3o9d.0001.dax.usw2.cache.amazonaws.com",
                    "Port": 8111
                },
                "NodeCreateTime": 1576625059.509,
                "AvailabilityZone": "us-west-2c",
                "NodeStatus": "available",
                "ParameterGroupStatus": "in-sync"
            },
            {
                "NodeId": "daxcluster-b",
                "Endpoint": {
                    "Address": "daxcluster-b.ey3o9d.0001.dax.usw2.cache.amazonaws.com",
                    "Port": 8111
                },
                "NodeCreateTime": 1576625059.509,
                "AvailabilityZone": "us-west-2a",
                "NodeStatus": "available",
                "ParameterGroupStatus": "in-sync"
            },
            {
                "NodeId": "daxcluster-c",
                "Endpoint": {
                    "Address": "daxcluster-c.ey3o9d.0001.dax.usw2.cache.amazonaws.com",
                    "Port": 8111
                },
                "NodeCreateTime": 1576625059.509,
                "AvailabilityZone": "us-west-2b",
                "NodeStatus": "available",
                "ParameterGroupStatus": "in-sync"
            }
        ],
        "PreferredMaintenanceWindow": "thu:13:00-thu:14:00",
        "SubnetGroup": "default",
        "SecurityGroups": [
            {
                "SecurityGroupIdentifier": "sg-1af6e36e",
                "Status": "active"
            }
        ],
        "IamRoleArn": "arn:aws:iam::123456789012:role/DAXServiceRoleForDynamoDBAccess",
        "ParameterGroup": {
            "ParameterGroupName": "default.dax1.0",
            "ParameterApplyStatus": "in-sync",
            "NodeIdsToReboot": []
        },
        "SSEDescription": {
            "Status": "ENABLED"
        }
    }
}

For more information, see Managing DAX Clusters in the Amazon DynamoDB Developer Guide.