I'm using SimpleSnitch. I have only one DC. Is there any problem to follow the below procedure?
-Simon From: Alexander Dejanovski Date: 2019-02-27 16:07 To: user Subject: Re: Question on changing node IP address I confirm what Oleksandr said. Just stop Cassandra, change the IP, and restart Cassandra. If you're using the GossipingPropertyFileSnitch, the node will redeclare its new IP through Gossip and that's it. If you're using the PropertyFileSnitch, well... you shouldn't as it's a rather dangerous and tedious snitch to use. But if you are, it'll require to change the file containing all the IP addresses across the cluster. I've been changing IPs on a whole cluster back in 2.1 this way and it went through seamlessly. Cheers, On Wed, Feb 27, 2019 at 8:54 AM Oleksandr Shulgin <oleksandr.shul...@zalando.de> wrote: On Wed, Feb 27, 2019 at 4:15 AM wxn...@zjqunshuo.com <wxn...@zjqunshuo.com> wrote: >After restart with the new address the server will notice it and log a >warning, but it will keep token ownership as long as it keeps the old host id >(meaning it must use the same data directory as before restart). Based on my understanding, token range is binded to host id. As long as host id doesn't change, everything is ok. Besides data directory, any other thing can lead to host id change? And how host id is caculated? For example, if I upgrade Cassandra binary to a new version, after restart, will host id change? I believe host id is calculated once the new node is initialized and never changes afterwards, even through major upgrades. It is stored in system keyspace in data directory, and is stable across restarts. -- Alex -- ----------------- Alexander Dejanovski France @alexanderdeja Consultant Apache Cassandra Consulting http://www.thelastpickle.com
