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From Gary Dusbabek <>
Subject Re: Hardware change of a node in the cluster
Date Mon, 04 Oct 2010 12:38:52 GMT
It should work this way:

1. Move your data to the new node (scp, etc.)
2. Make sure the new node is configured to use the same token as the new node.
3. Stand up the new node.
4. Turn off the old node.

If your environment is volatile, it's probably best to run `nodetool
repair` on the new node.


On Mon, Oct 4, 2010 at 04:58, Utku Can Top├žu <> wrote:
> Hey All,
> Recently I've tried to upgrade (hw upgrade) one of the nodes in my cassandra
> cluster from ec2-small to ec2-large.
> However, there were problems and since the IP of the new instance was
> different from the previous instance. The other nodes didnot recognize it in
> the ring.
> So what should be the best practice for a complete hardware change of one
> node in the cluster while keeping the data that it has.
> Regards,
> Utku

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