I recently upgraded the underlying machines of my Cassandra cluster (In AWS, from "old" to "current" generation hardware). I thought I'd be able to see if this had a performance impact in Opscenter.
What I didn't consider is that as I decommissioned each node, it was being removed from the performance graphs! This is a bummer. Is there any hidden option to show "all collected data", even from nodes not currently in the cluster? Is the tracking data even still there, or does it get immediately purged.
My workaround going forward will be writing down key metrics/taking screenshots otherwise.