We're currently running a small 5 node 2.0.5 cluster in a single datacenter using the SimpleStrategy replication strategy with replication factor of 3. We want to migrate our data from our current datacenter to a new datacenter, without incurring any downtime or data loss. There is no plan to maintain or keep the old (current) datacenter after the migration is complete. I'm wondering how best to go about this migration.Shoud We:
- add a 2nd datacenter as described here - "Adding a datacenter to cluster", then decommission the 1st datacenter. Can we even do this given we're currently setup with SimpleStrategy replication?
- or should we just start adding new nodes from the new datacenter to our existing cluster as described here? Then once we've added all the new nodes, start decommissioning all the old nodes from the old/current datacenter as described here.Thanks for your help and time!