Network.AWS.ElastiCache.ModifyCacheCluster

The ModifyCacheCluster operation modifies the settings for a cache cluster. You can use this operation to change one or more cluster configuration parameters by specifying the parameters and the new values.

http://docs.aws.amazon.com/AmazonElastiCache/latest/APIReference/API_ModifyCacheCluster.html

Request

data ModifyCacheCluster

Instances

Eq ModifyCacheCluster

Show ModifyCacheCluster

AWSRequest ModifyCacheCluster

ToQuery ModifyCacheCluster

ToHeaders ModifyCacheCluster

ToPath ModifyCacheCluster

type Rs ModifyCacheCluster = ModifyCacheClusterResponse

type Sv ModifyCacheCluster = ElastiCache

Request constructor

modifyCacheCluster

Arguments

:: Text

mccCacheClusterId

-> ModifyCacheCluster

ModifyCacheCluster constructor.

The fields accessible through corresponding lenses are:

• mccAZMode :: Maybe AZMode
• mccApplyImmediately :: Maybe Bool
• mccAutoMinorVersionUpgrade :: Maybe Bool
• mccCacheClusterId :: Text
• mccCacheNodeIdsToRemove :: [Text]
• mccCacheParameterGroupName :: Maybe Text
• mccCacheSecurityGroupNames :: [Text]
• mccEngineVersion :: Maybe Text
• mccNewAvailabilityZones :: [Text]
• mccNotificationTopicArn :: Maybe Text
• mccNotificationTopicStatus :: Maybe Text
• mccNumCacheNodes :: Maybe Int
• mccPreferredMaintenanceWindow :: Maybe Text
• mccSecurityGroupIds :: [Text]
• mccSnapshotRetentionLimit :: Maybe Int
• mccSnapshotWindow :: Maybe Text

Request lenses

mccAZMode :: Lens' ModifyCacheCluster (Maybe AZMode)

Specifies whether the new nodes in this Memcached cache cluster are all created in a single Availability Zone or created across multiple Availability Zones.

Valid values: 'single-az' | 'cross-az'.

This option is only supported for Memcached cache clusters.

mccApplyImmediately :: Lens' ModifyCacheCluster (Maybe Bool)

If true, this parameter causes the modifications in this request and any pending modifications to be applied, asynchronously and as soon as possible, regardless of the PreferredMaintenanceWindow setting for the cache cluster.

If false, then changes to the cache cluster are applied on the next maintenance reboot, or the next failure reboot, whichever occurs first.

If you perform a ModifyCacheCluster before a pending modification is applied, the pending modification is replaced by the newer modification. Valid values: true | false

Default: false

mccAutoMinorVersionUpgrade :: Lens' ModifyCacheCluster (Maybe Bool)

If true, then minor engine upgrades will be applied automatically to the cache cluster during the maintenance window.

Valid values: true | false

Default: true

mccCacheClusterId :: Lens' ModifyCacheCluster Text

The cache cluster identifier. This value is stored as a lowercase string.

mccCacheNodeIdsToRemove :: Lens' ModifyCacheCluster [Text]

A list of cache node IDs to be removed. A node ID is a numeric identifier (0001, 0002, etc.). This parameter is only valid when NumCacheNodes is less than the existing number of cache nodes. The number of cache node IDs supplied in this parameter must match the difference between the existing number of cache nodes in the cluster or pending cache nodes, whichever is greater, and the value of NumCacheNodes in the request.

For example: If you have 3 active cache nodes, 7 pending cache nodes, and the number of cache nodes in this ModifyCacheCluser call is 5, you must list 2 (7 - 5) cache node IDs to remove.

mccCacheParameterGroupName :: Lens' ModifyCacheCluster (Maybe Text)

The name of the cache parameter group to apply to this cache cluster. This change is asynchronously applied as soon as possible for parameters when the ApplyImmediately parameter is specified as true for this request.

mccCacheSecurityGroupNames :: Lens' ModifyCacheCluster [Text]

A list of cache security group names to authorize on this cache cluster. This change is asynchronously applied as soon as possible.

This parameter can be used only with clusters that are created outside of an Amazon Virtual Private Cloud (VPC).

Constraints: Must contain no more than 255 alphanumeric characters. Must not be Default.

mccEngineVersion :: Lens' ModifyCacheCluster (Maybe Text)

The upgraded version of the cache engine to be run on the cache nodes.

mccNewAvailabilityZones :: Lens' ModifyCacheCluster [Text]

The list of Availability Zones where the new Memcached cache nodes will be created.

This parameter is only valid when NumCacheNodes in the request is greater than the sum of the number of active cache nodes and the number of cache nodes pending creation (which may be zero). The number of Availability Zones supplied in this list must match the cache nodes being added in this request.

This option is only supported on Memcached clusters.

Scenarios: Scenario 1: You have 3 active nodes and wish to add 2 nodes.

Specify 'NumCacheNodes=5' (3 + 2) and optionally specify two Availability Zones for the two new nodes. Scenario 2: You have 3 active nodes and 2 nodes pending creation (from the scenario 1 call) and want to add 1 more node.

Specify 'NumCacheNodes=6' ((3 + 2) + 1) and optionally specify an Availability Zone for the new node. Scenario 3: You want to cancel all pending actions.

Specify 'NumCacheNodes=3' to cancel all pending actions.

The Availability Zone placement of nodes pending creation cannot be modified. If you wish to cancel any nodes pending creation, add 0 nodes by setting NumCacheNodes to the number of current nodes.

If 'cross-az' is specified, existing Memcached nodes remain in their current Availability Zone. Only newly created nodes can be located in different Availability Zones. For guidance on how to move existing Memcached nodes to different Availability Zones, see the Availability Zone Considerations section of Cache Node Considerations for Memcached.

Impact of new add/remove requests upon pending requests

Scenarios Pending Operation New Request Results Scenario-1 Delete Delete The new delete, pending or immediate, replaces the pending delete. Scenario-2 Delete Create The new create, pending or immediate, replaces the pending delete. Scenario-3 Create Delete The new delete, pending or immediate, replaces the pending create. Scenario-4 Create Create The new create is added to the pending create. Important: If the new create request is Apply Immediately - Yes, all creates are performed immediately. If the new create request is Apply Immediately - No, all creates are pending. Example: 'NewAvailabilityZones.member.1=us-east-1a&NewAvailabilityZones.member.2=us-east-1b&NewAvailabilityZones.member.3=us-east-1d'

mccNotificationTopicArn :: Lens' ModifyCacheCluster (Maybe Text)

The Amazon Resource Name (ARN) of the Amazon SNS topic to which notifications will be sent.

mccNotificationTopicStatus :: Lens' ModifyCacheCluster (Maybe Text)

The status of the Amazon SNS notification topic. Notifications are sent only if the status is active.

Valid values: active | inactive

mccNumCacheNodes :: Lens' ModifyCacheCluster (Maybe Int)

The number of cache nodes that the cache cluster should have. If the value for NumCacheNodes is greater than the sum of the number of current cache nodes and the number of cache nodes pending creation (which may be zero), then more nodes will be added. If the value is less than the number of existing cache nodes, then nodes will be removed. If the value is equal to the number of current cache nodes, then any pending add or remove requests are canceled.

If you are removing cache nodes, you must use the CacheNodeIdsToRemove parameter to provide the IDs of the specific cache nodes to remove.

For cache clusters running Redis, the value of NumCacheNodesmust be 1.

Note: Adding or removing Memcached cache nodes can be applied immediately or as a pending action. See ApplyImmediately. A pending action to modify the number of cache nodes in a cluster during its maintenance window, whether by adding or removing nodes in accordance with the scale out architecture, is not queued. The customer's latest request to add or remove nodes to the cluster overrides any previous pending actions to modify the number of cache nodes in the cluster. For example, a request to remove 2 nodes would override a previous pending action to remove 3 nodes. Similarly, a request to add 2 nodes would override a previous pending action to remove 3 nodes and vice versa. As Memcached cache nodes may now be provisioned in different Availability Zones with flexible cache node placement, a request to add nodes does not automatically override a previous pending action to add nodes. The customer can modify the previous pending action to add more nodes or explicitly cancel the pending request and retry the new request. To cancel pending actions to modify the number of cache nodes in a cluster, use the ModifyCacheCluster request and set NumCacheNodes equal to the number of cache nodes currently in the cache cluster.

mccPreferredMaintenanceWindow :: Lens' ModifyCacheCluster (Maybe Text)

The weekly time range (in UTC) during which system maintenance can occur. Note that system maintenance may result in an outage. This change is made immediately. If you are moving this window to the current time, there must be at least 120 minutes between the current time and end of the window to ensure that pending changes are applied.

mccSecurityGroupIds :: Lens' ModifyCacheCluster [Text]

Specifies the VPC Security Groups associated with the cache cluster.

This parameter can be used only with clusters that are created in an Amazon Virtual Private Cloud (VPC).

mccSnapshotRetentionLimit :: Lens' ModifyCacheCluster (Maybe Int)

The number of days for which ElastiCache will retain automatic cache cluster snapshots before deleting them. For example, if you set SnapshotRetentionLimit to 5, then a snapshot that was taken today will be retained for 5 days before being deleted.

Important If the value of SnapshotRetentionLimit is set to zero (0), backups are turned off.

mccSnapshotWindow :: Lens' ModifyCacheCluster (Maybe Text)

The daily time range (in UTC) during which ElastiCache will begin taking a daily snapshot of your cache cluster.

Response

data ModifyCacheClusterResponse

Instances

Eq ModifyCacheClusterResponse

Show ModifyCacheClusterResponse

FromXML ModifyCacheClusterResponse

Response constructor

modifyCacheClusterResponse :: ModifyCacheClusterResponse

ModifyCacheClusterResponse constructor.

The fields accessible through corresponding lenses are:

• mccrCacheCluster :: Maybe CacheCluster

Response lenses

mccrCacheCluster :: Lens' ModifyCacheClusterResponse (Maybe CacheCluster)