elasticache_modify_replication_group_shard_configuration: Modifies a replication group's shards (node groups) by allowing you to add shards, remove shards, or rebalance the keyspaces among existing shards

Description

Modifies a replication group's shards (node groups) by allowing you to add shards, remove shards, or rebalance the keyspaces among existing shards.

See https://www.paws-r-sdk.com/docs/elasticache_modify_replication_group_shard_configuration/ for full documentation.

Usage

elasticache_modify_replication_group_shard_configuration(
  ReplicationGroupId,
  NodeGroupCount,
  ApplyImmediately,
  ReshardingConfiguration = NULL,
  NodeGroupsToRemove = NULL,
  NodeGroupsToRetain = NULL
)

Arguments

ReplicationGroupId

[required] The name of the Redis OSS (cluster mode enabled) cluster (replication group) on which the shards are to be configured.

NodeGroupCount

[required] The number of node groups (shards) that results from the modification of the shard configuration.

ApplyImmediately

[required] Indicates that the shard reconfiguration process begins immediately. At present, the only permitted value for this parameter is true.

Value: true

ReshardingConfiguration

Specifies the preferred availability zones for each node group in the cluster. If the value of NodeGroupCount is greater than the current number of node groups (shards), you can use this parameter to specify the preferred availability zones of the cluster's shards. If you omit this parameter ElastiCache selects availability zones for you.

You can specify this parameter only if the value of NodeGroupCount is greater than the current number of node groups (shards).

NodeGroupsToRemove

If the value of NodeGroupCount is less than the current number of node groups (shards), then either NodeGroupsToRemove or NodeGroupsToRetain is required. NodeGroupsToRemove is a list of NodeGroupIds to remove from the cluster.

ElastiCache (Redis OSS) will attempt to remove all node groups listed by NodeGroupsToRemove from the cluster.

NodeGroupsToRetain

If the value of NodeGroupCount is less than the current number of node groups (shards), then either NodeGroupsToRemove or NodeGroupsToRetain is required. NodeGroupsToRetain is a list of NodeGroupIds to retain in the cluster.

ElastiCache (Redis OSS) will attempt to remove all node groups except those listed by NodeGroupsToRetain from the cluster.