This is the reason behind this question: I am using a redis cluster on AWS elasticcache as a datastore. I do not enable eviction because I need to keep the data alive inside the redis cluster for as long as the users are actively using them.
It is a temporary solution. Eventually I will have a mysql db to persist the data.
At this stage I want to be able to monitor the disk usage of the redis cluster. It is because redis persists data to disk. I want to ensure any surge of usage does not use up free disk space and cause failure. When the disk usage is above a threadhold, I can scale out the redis cluster.
But based on what I can see in Cloudwatch -> Metrics, I do not find any disk usage related metrics.
Did I miss it? Is there any other way to obtain or infer the data?
