Rebooting a cluster - Amazon ElastiCache
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Rebooting a cluster

Some changes require that the cluster be rebooted for the changes to be applied. For example, for some parameters, changing the parameter value in a parameter group is only applied after a reboot.

When you reboot a cluster, the cluster flushes all its data and restarts its engine. During this process you cannot access the cluster. Because the cluster flushed all its data, when the cluster is available again, you are starting with an empty cluster.

You are able to reboot a cluster using the ElastiCache console, the Amazon CLI, or the ElastiCache API. Whether you use the ElastiCache console, the Amazon CLI or the ElastiCache API, you can only initiate rebooting a single cluster. To reboot multiple clusters you must iterate on the process or operation.

You can reboot a cluster using the ElastiCache console.

To reboot a cluster (console)

  1. Sign in to the Amazon Web Services Management Console and open the ElastiCache console at https://console.amazonaws.cn/elasticache/.

  2. From the list in the upper-right corner, choose the Amazon Region you are interested in.

  3. In the navigation pane, choose the engine running on the cluster that you want to reboot.

    A list of clusters running the chosen engine appears.

  4. Choose the cluster to reboot by choosing the button to the left of the cluster's name.

    Choose Actions and then choose Reboot.

    If you choose more than one cluster, the Reboot button isn't active.

To reboot multiple clusters, repeat steps 2 through 5 for each cluster that you want to reboot. You do not need to wait for one cluster to finish rebooting to reboot another.

To reboot a specific node, select the node and then choose Reboot.

To reboot a cluster (Amazon CLI), use the reboot-cache-cluster CLI operation.

To reboot specific nodes in the cluster, use the --cache-node-ids-to-reboot to list the specific clusters to reboot. The following command reboots the nodes 0001, 0002, and 0004 of my-cluster.

For Linux, OS X, or Unix:

aws elasticache reboot-cache-cluster \
    --cache-cluster-id my-cluster \
    --cache-node-ids-to-reboot 0001 0002 0004

For Windows:

aws elasticache reboot-cache-cluster ^
    --cache-cluster-id my-cluster ^
    --cache-node-ids-to-reboot 0001 0002 0004

To reboot all the nodes in the cluster, use the --cache-node-ids-to-reboot parameter and list all the cluster's node ids. For more information, see reboot-cache-cluster.

To reboot a cluster using the ElastiCache API, use the RebootCacheCluster action.

To reboot specific nodes in the cluster, use the CacheNodeIdsToReboot to list the specific clusters to reboot. The following command reboots the nodes 0001, 0002, and 0004 of my-cluster.

https://elasticache.us-west-2.amazonaws.com/
   ?Action=RebootCacheCluster
   &CacheClusterId=my-cluster
   &CacheNodeIdsToReboot.member.1=0001
   &CacheNodeIdsToReboot.member.2=0002
   &CacheNodeIdsToReboot.member.3=0004
   &Version=2015-02-02
   &SignatureVersion=4
   &SignatureMethod=HmacSHA256
   &Timestamp=20150202T192317Z
   &X-Amz-Credential=<credential>

To reboot all the nodes in the cluster, use the CacheNodeIdsToReboot parameter and list all the cluster's node ids. For more information, see RebootCacheCluster.