DAX / Client / decrease_replication_factor

decrease_replication_factor#

DAX.Client.decrease_replication_factor(**kwargs)#

Removes one or more nodes from a DAX cluster.

Note

You cannot use DecreaseReplicationFactor to remove the last node in a DAX cluster. If you need to do this, use DeleteCluster instead.

Request Syntax

response = client.decrease_replication_factor(
    ClusterName='string',
    NewReplicationFactor=123,
    AvailabilityZones=[
        'string',
    ],
    NodeIdsToRemove=[
        'string',
    ]
)

Parameters:

ClusterName (string) –
[REQUIRED]

The name of the DAX cluster from which you want to remove nodes.
NewReplicationFactor (integer) –
[REQUIRED]

The new number of nodes for the DAX cluster.
AvailabilityZones (list) –
The Availability Zone(s) from which to remove nodes.
- (string) –
NodeIdsToRemove (list) –
The unique identifiers of the nodes to be removed from the cluster.
- (string) –

Return type:

dict

Returns:

Response Syntax

{
    'Cluster': {
        'ClusterName': 'string',
        'Description': 'string',
        'ClusterArn': 'string',
        'TotalNodes': 123,
        'ActiveNodes': 123,
        'NodeType': 'string',
        'Status': 'string',
        'ClusterDiscoveryEndpoint': {
            'Address': 'string',
            'Port': 123,
            'URL': 'string'
        },
        'NodeIdsToRemove': [
            'string',
        ],
        'Nodes': [
            {
                'NodeId': 'string',
                'Endpoint': {
                    'Address': 'string',
                    'Port': 123,
                    'URL': 'string'
                },
                'NodeCreateTime': datetime(2015, 1, 1),
                'AvailabilityZone': 'string',
                'NodeStatus': 'string',
                'ParameterGroupStatus': 'string'
            },
        ],
        'PreferredMaintenanceWindow': 'string',
        'NotificationConfiguration': {
            'TopicArn': 'string',
            'TopicStatus': 'string'
        },
        'SubnetGroup': 'string',
        'SecurityGroups': [
            {
                'SecurityGroupIdentifier': 'string',
                'Status': 'string'
            },
        ],
        'IamRoleArn': 'string',
        'ParameterGroup': {
            'ParameterGroupName': 'string',
            'ParameterApplyStatus': 'string',
            'NodeIdsToReboot': [
                'string',
            ]
        },
        'SSEDescription': {
            'Status': 'ENABLING'|'ENABLED'|'DISABLING'|'DISABLED'
        },
        'ClusterEndpointEncryptionType': 'NONE'|'TLS'
    }
}

Response Structure

(dict) –
- Cluster (dict) –
  
  A description of the DAX cluster, after you have decreased its replication factor.
  - ClusterName (string) –
    
    The name of the DAX cluster.
  - Description (string) –
    
    The description of the cluster.
  - ClusterArn (string) –
    
    The Amazon Resource Name (ARN) that uniquely identifies the cluster.
  - TotalNodes (integer) –
    
    The total number of nodes in the cluster.
  - ActiveNodes (integer) –
    
    The number of nodes in the cluster that are active (i.e., capable of serving requests).
  - NodeType (string) –
    
    The node type for the nodes in the cluster. (All nodes in a DAX cluster are of the same type.)
  - Status (string) –
    
    The current status of the cluster.
  - ClusterDiscoveryEndpoint (dict) –
    
    The endpoint for this DAX cluster, consisting of a DNS name, a port number, and a URL. Applications should use the URL to configure the DAX client to find their cluster.
    - Address (string) –
      
      The DNS hostname of the endpoint.
    - Port (integer) –
      
      The port number that applications should use to connect to the endpoint.
    - URL (string) –
      
      The URL that applications should use to connect to the endpoint. The default ports are 8111 for the “dax” protocol and 9111 for the “daxs” protocol.
  - NodeIdsToRemove (list) –
    
    A list of nodes to be removed from the cluster.
    - (string) –
  - Nodes (list) –
    
    A list of nodes that are currently in the cluster.
    - (dict) –
      
      Represents an individual node within a DAX cluster.
      - NodeId (string) –
        
        A system-generated identifier for the node.
      - Endpoint (dict) –
        
        The endpoint for the node, consisting of a DNS name and a port number. Client applications can connect directly to a node endpoint, if desired (as an alternative to allowing DAX client software to intelligently route requests and responses to nodes in the DAX cluster.
        
        Address (string) –
        
        The DNS hostname of the endpoint.
        
        Port (integer) –
        
        The port number that applications should use to connect to the endpoint.
        
        URL (string) –
        
        The URL that applications should use to connect to the endpoint. The default ports are 8111 for the “dax” protocol and 9111 for the “daxs” protocol.
      - NodeCreateTime (datetime) –
        
        The date and time (in UNIX epoch format) when the node was launched.
      - AvailabilityZone (string) –
        
        The Availability Zone (AZ) in which the node has been deployed.
      - NodeStatus (string) –
        
        The current status of the node. For example: available.
      - ParameterGroupStatus (string) –
        
        The status of the parameter group associated with this node. For example, in-sync.
  - PreferredMaintenanceWindow (string) –
    
    A range of time when maintenance of DAX cluster software will be performed. For example: sun:01:00-sun:09:00. Cluster maintenance normally takes less than 30 minutes, and is performed automatically within the maintenance window.
  - NotificationConfiguration (dict) –
    
    Describes a notification topic and its status. Notification topics are used for publishing DAX events to subscribers using Amazon Simple Notification Service (SNS).
    - TopicArn (string) –
      
      The Amazon Resource Name (ARN) that identifies the topic.
    - TopicStatus (string) –
      
      The current state of the topic. A value of “active” means that notifications will be sent to the topic. A value of “inactive” means that notifications will not be sent to the topic.
  - SubnetGroup (string) –
    
    The subnet group where the DAX cluster is running.
  - SecurityGroups (list) –
    
    A list of security groups, and the status of each, for the nodes in the cluster.
    - (dict) –
      
      An individual VPC security group and its status.
      - SecurityGroupIdentifier (string) –
        
        The unique ID for this security group.
      - Status (string) –
        
        The status of this security group.
  - IamRoleArn (string) –
    
    A valid Amazon Resource Name (ARN) that identifies an IAM role. At runtime, DAX will assume this role and use the role’s permissions to access DynamoDB on your behalf.
  - ParameterGroup (dict) –
    
    The parameter group being used by nodes in the cluster.
    - ParameterGroupName (string) –
      
      The name of the parameter group.
    - ParameterApplyStatus (string) –
      
      The status of parameter updates.
    - NodeIdsToReboot (list) –
      
      The node IDs of one or more nodes to be rebooted.
      - (string) –
  - SSEDescription (dict) –
    
    The description of the server-side encryption status on the specified DAX cluster.
    - Status (string) –
      
      The current state of server-side encryption:
      - ENABLING - Server-side encryption is being enabled.
      - ENABLED - Server-side encryption is enabled.
      - DISABLING - Server-side encryption is being disabled.
      - DISABLED - Server-side encryption is disabled.
  - ClusterEndpointEncryptionType (string) –
    
    The type of encryption supported by the cluster’s endpoint. Values are:
    - NONE for no encryption TLS for Transport Layer Security

decrease_replication_factor#

Note

Request Syntax

Response Syntax

Response Structure

Exceptions