From my understanding of replica copies, cassandra picks which nodes to replicate the data based on replication strategy, and those same "replica partner" nodes are always used according to token ring distribution.
If you change the replication strategy, does cassandra pick new nodes to replicate to? (for example if you went from simple strategy to a networkTopology strategy where copies are to be sent to another datacenter) If so, do you now have unused replica data on the "old" replica nodes that you need to clean up manually?
