On Tue, May 24, 2022 at 04:43:18PM +0000, Eric Robinson wrote: > If a cluster has 4 data nodes, and they are deployed in such a way > that Nodes 1 & 2 replicate only to each other, and Nodes 3 & 4 > replicate only to each other, is it okay to run Nodes 1 & 2 on a > different version of drbd and kmod-drbd than nodes 3 & 4?
Should be fine in general. I mean what if you upgrade nodes, and you upgrade 1 and then reconnect, then you also have 2 different versions. And that is a of course a supported upgrade scenario. And in your case they don't even talk to each other. Anyways, when a resource connects to a peer there is a handshake and there min and max protocol versions get exchanged and as long as they have some common ground the connection get's established, otherwise aborted. Fun fact: there is current work that latest DRBD9 can even talk to 8.4 again. Regards, rck _______________________________________________ Star us on GITHUB: https://github.com/LINBIT drbd-user mailing list drbd-user@lists.linbit.com https://lists.linbit.com/mailman/listinfo/drbd-user
