Hi Alex, >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? -Simon From: Oleksandr Shulgin Date: 2019-02-26 18:36 To: User Subject: Re: Question on changing node IP address On Tue, Feb 26, 2019 at 9:39 AM wxn...@zjqunshuo.com <wxn...@zjqunshuo.com> wrote: I'm running 2.2.8 with vnodes and I'm planning to change node IP address. My procedure is: Turn down one node, setting auto_bootstrap to false in yaml file, then bring it up with -Dcassandra.replace_address. Repeat the procedure one by one for the other nodes. I care about streaming because the data is very large and if there is streaming, it will take a long time. When the node with new IP be brought up, will it take over the token range it has before? I expect no token range reassignment and no streaming. Am I right? Any thing I need care about when making IP address change? Changing the IP address of a node does not require special considerations. 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). At the same time, *do not* use the replace_address option: it assumes empty data directory and will try to stream data from other replicas into the node. -- Alex
