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Dynamically decreases the number of replicas in a Redis (cluster mode disabled) replication group or the number of replica nodes in one or more node groups (shards) of a Redis (cluster mode enabled) replication group. This operation is performed with no cluster down time.
This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginDecreaseReplicaCount and EndDecreaseReplicaCount.
Namespace: Amazon.ElastiCache
Assembly: AWSSDK.ElastiCache.dll
Version: 3.x.y.z
public abstract Task<DecreaseReplicaCountResponse> DecreaseReplicaCountAsync( DecreaseReplicaCountRequest request, CancellationToken cancellationToken )
Container for the necessary parameters to execute the DecreaseReplicaCount service method.
A cancellation token that can be used by other objects or threads to receive notice of cancellation.
| Exception | Condition |
|---|---|
| ClusterQuotaForCustomerExceededException | The request cannot be processed because it would exceed the allowed number of clusters per customer. |
| InsufficientCacheClusterCapacityException | The requested cache node type is not available in the specified Availability Zone. For more information, see InsufficientCacheClusterCapacity in the ElastiCache User Guide. |
| InvalidCacheClusterStateException | The requested cluster is not in the available state. |
| InvalidParameterCombinationException | Two or more incompatible parameters were specified. |
| InvalidParameterValueException | The value for a parameter is invalid. |
| InvalidReplicationGroupStateException | The requested replication group is not in the available state. |
| InvalidVPCNetworkStateException | The VPC network is in an invalid state. |
| NodeGroupsPerReplicationGroupQuotaExceededException | The request cannot be processed because it would exceed the maximum allowed number of node groups (shards) in a single replication group. The default maximum is 90 |
| NodeQuotaForCustomerExceededException | The request cannot be processed because it would exceed the allowed number of cache nodes per customer. |
| NoOperationException | The operation was not performed because no changes were required. |
| ReplicationGroupNotFoundException | The specified replication group does not exist. |
| ServiceLinkedRoleNotFoundException | The specified service linked role (SLR) was not found. |
.NET:
Supported in: 8.0 and newer, Core 3.1
.NET Standard:
Supported in: 2.0
.NET Framework:
Supported in: 4.5 and newer