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amazon-web-servicesredisamazon-elasticache

Will data loss in AWS Redis cluster, if I will change instance type?

I can't find information, on how to change my AWS Redis cluster instance type and won't lose my data in it?

Solution

  • Short Answer - No, Just don't reboot your master nodes.

    Long Answer - Elasticache implements somewhat of a replacement work-flow whenever you modify your clusters. New Nodes will be launched in the backend with that modification (in your case, a different node type) and then they sync with the data in your current nodes. Once the nodes are in sync, there will be change in the DNS records and modification will end.

    https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/CacheNodes.NodeReplacement.html

    PS - always a good idea to take back up if its the cluster has critical data.

    Cheers.