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.
elasticache_modify_replication_group_shard_configuration(
ReplicationGroupId,
NodeGroupCount,
ApplyImmediately,
ReshardingConfiguration = NULL,
NodeGroupsToRemove = NULL,
NodeGroupsToRetain = NULL
)[required] The name of the Valkey or Redis OSS (cluster mode enabled) cluster (replication group) on which the shards are to be configured.
[required] The number of node groups (shards) that results from the modification of the shard configuration.
[required] Indicates that the shard reconfiguration process begins immediately. At
present, the only permitted value for this parameter is true.
Value: true
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).
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 will attempt to remove all node groups listed by
NodeGroupsToRemove from the cluster.
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 will attempt to remove all node groups except those listed
by NodeGroupsToRetain from the cluster.