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**To decrease replica count**
The following ``decrease-replica-count`` example dynamically decreases the number of replics 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 downtime. ::
aws elasticache decrease-replica-count \
--replication-group-id my-cluster \
--apply-immediately \
--new-replica-count 2
Output::
{
"ReplicationGroup": {
"ReplicationGroupId": "my-cluster",
"Description": " ",
"Status": "modifying",
"PendingModifiedValues": {},
"MemberClusters": [
"myrepliace",
"my-cluster-001",
"my-cluster-002",
"my-cluster-003"
],
"NodeGroups": [
{
"NodeGroupId": "0001",
"Status": "modifying",
"PrimaryEndpoint": {
"Address": "my-cluster.xxxxx.ng.0001.usw2.cache.amazonaws.com",
"Port": 6379
},
"ReaderEndpoint": {
"Address": "my-cluster-ro.xxxxx.ng.0001.usw2.cache.amazonaws.com",
"Port": 6379
},
"NodeGroupMembers": [
{
"CacheClusterId": "myrepliace",
"CacheNodeId": "0001",
"ReadEndpoint": {
"Address": "myrepliace.xxxxx.0001.usw2.cache.amazonaws.com",
"Port": 6379
},
"PreferredAvailabilityZone": "us-west-2a",
"CurrentRole": "replica"
},
{
"CacheClusterId": "my-cluster-001",
"CacheNodeId": "0001",
"ReadEndpoint": {
"Address": "my-cluster-001.xxxxx.0001.usw2.cache.amazonaws.com",
"Port": 6379
},
"PreferredAvailabilityZone": "us-west-2a",
"CurrentRole": "primary"
},
{
"CacheClusterId": "my-cluster-002",
"CacheNodeId": "0001",
"ReadEndpoint": {
"Address": "my-cluster-002.xxxxx.0001.usw2.cache.amazonaws.com",
"Port": 6379
},
"PreferredAvailabilityZone": "us-west-2a",
"CurrentRole": "replica"
},
{
"CacheClusterId": "my-cluster-003",
"CacheNodeId": "0001",
"ReadEndpoint": {
"Address": "my-cluster-003.xxxxx.0001.usw2.cache.amazonaws.com",
"Port": 6379
},
"PreferredAvailabilityZone": "us-west-2a",
"CurrentRole": "replica"
}
]
}
],
"AutomaticFailover": "disabled",
"SnapshotRetentionLimit": 0,
"SnapshotWindow": "07:30-08:30",
"ClusterEnabled": false,
"CacheNodeType": "cache.r5.xlarge",
"TransitEncryptionEnabled": false,
"AtRestEncryptionEnabled": false
}
}
For more information, see `Changing the Number of Replicas <https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/increase-decrease-replica-count.html>`__ in the *Elasticache User Guide*.
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