If you're just trying to change an IP, you can just stop the node, change
the IP and restart the node and it'll be fine (change it everywhere).

Replacing a node is different: replacing is when a node dies, and you're
replacing it with a new node that doesnt have any data. The
-Dcassandra.replace_address option tells the starting instance it needs to
look for a dead host and get all of the data that host should have had.

On Tue, Mar 13, 2018 at 6:57 PM, Cyril Scetbon <cyril.scet...@free.fr>

> Hey,
> I always thought that changing the IP address of a node requires to use
> the same procedure as for a died node, which part of it consists in
> starting Cassandra the -Dcassandra.replace_address option as indicated at
> https://docs.datastax.com/en/cassandra/3.0/cassandra/
> operations/opsReplaceNode.html
> However, it’s said at https://docs.datastax.com/en/
> dse/5.1/dse-admin/datastax_enterprise/operations/opsChangeIp.html that we
> can simply start the new node after having done some changes in
> configuration files that could be impacted (seed list in cassandra.yaml,
> cassandra-topology.properties). Is it a feature of the DSE ? Is it
> something that works with the community version ? How does it work exactly
> ? Does the replacement happen because it has the same data as the replaced
> node and something like an id is found in the local files ? The token list ?
> Thank you
> —
> Cyril Scetbon

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