And you confirm that if we use snitches like EC2Snitch or GPFS we’ll only have to update the seed list in Cassandra.yaml if this node is a seed ?
— Cyril Scetbon > On Mar 13, 2018, at 10:08 PM, Jeff Jirsa <jji...@gmail.com> wrote: > > 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 > <mailto:cyril.scet...@free.fr>> wrote: > 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 > > <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 > > <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 > >
