>>> Strahil Nikolov via Users <[email protected]> schrieb am 28.03.2022 um 15:49 in Nachricht <[email protected]>: > One huge benefit of the new stack is that you can have 8 corosync rings, > which is really powerful.
Hm I wonder: If one ring is not good enough and two rings are not good enough, then per induction n+1 rings aren't good enough also, so 8 rings don't really help ;-) Sorry for the joke! Ulrich > Best Regards,Strahil Nikolov > > > On Mon, Mar 28, 2022 at 9:27, Christine caulfield<[email protected]> > wrote: On 28/03/2022 03:30, Somanath Jeeva via Users wrote: >> Hi , >> >> I am upgrading from corosync 2.x/pacemaker 1.x to corosync 3.x/pacemaker >> 2.1.x >> >> In our use case we are using a 2 node corosync/pacemaker cluster. >> >> In corosync 2.x version I was using udpu as transport method. In the >> corosync 3.x , as per man pages, the default transport mode is knet . >> And in knet it uses udp as knet method. >> >> I have the below doubts on the transport method. >> >> 1. Does knet require any special configuration on network level(like >> multicast enabling). > > > No. What knet calls UDP is similar (from the user POV) to corosync's > UDPU, it's a unicast transport and doesn't need any multicast > configuration. > > Sorry that's confusing, but it's more technically 'correct'. The main > reason UDPU was called that was because it was new to corosync when the > old (multicast) UDP protocol caused trouble for some people without good > multicast networks. > > >> 2. In corosync 2.x udp was used for multicast, in knet transport does >> udp mean multicast. > > No, see above. There is no multicast transport in knet. > >> 3. Will udpu be deprecated in future. >> > > Yes. We strongly recommend people use knet as the corosync transport as > that is the one getting most development. The old UDP/UDPU protocols > will only get bugfixes. Knet provides muti-homing up to 8 links, and > link priorities and much more. > > I wrote a paper on this when we first introduced knet into corosync > which might help: > > https://people.redhat.com/ccaulfie/docs/KnetCorosync.pdf > > > Chrissie > > >> Kindly help me with these doubts. >> >> With Regards >> >> Somanath Thilak J >> >> >> _______________________________________________ >> Manage your subscription: >> https://lists.clusterlabs.org/mailman/listinfo/users >> >> ClusterLabs home: https://www.clusterlabs.org/ > > _______________________________________________ > Manage your subscription: > https://lists.clusterlabs.org/mailman/listinfo/users > > ClusterLabs home: https://www.clusterlabs.org/ > _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/
