On Mon, Apr 28, 2014 at 10:52 PM, nash <nas...@gmail.com> wrote: > I have a new set of nodes and I'd like to migrate my entire cluster onto > them without any downtime. I believe that I can launch the new cluster and > have them join the ring and then use nodetool to decommission the old nodes > one at a time. But, I'm wondering what is the safest way to update the > seeds in the cassandra.yaml files? AFAICT, there is nothing particularly > special about the choices of seeds? So, prior to starting decom, I was > figuring I could update all the seeds to some subset of the new cluster. Is > that reliable? >
The fastest way to vertically scale a node is : https://engineering.eventbrite.com/changing-the-ip-address-of-a-cassandra-node-with-auto_bootstrapfalse/ As a minor note, you do lose any hints destined for that node while you are doing the copy, so use pre-copy techniques (rsync, then re-rsync with --delete) and then immediately repair to shorten the window of inconsistency if you read at CL.ONE. =Rob
