On Tue, Aug 15, 2017 at 10:28 AM David Turner <[email protected]> wrote:
> There is nothing that will stop you from having an even number of mons > (including 2). You just run the chance of getting into a split brain > scenario. > Just a note: even numbers of monitors mean that it's easier to lose quorums, but they cannot create a classic split brain (in which two sets of monitors both think they are in charge). We work very hard to avoid that situation ever arising in RADOS. :) -Greg As long as you aren't planning to stay in that scenario, I don't see a > problem with it. I have 3 mons in my home cluster and I've had to remove > one before leaving me with 2 for a few hours while I re-provisioned the > third and nothing funky happened. > > Most ways to deploy a cluster allow you to create the cluster with 3+ mons > at the same time (inital_mons). What are you doing that only allows you to > add one at a time? > > On Tue, Aug 15, 2017 at 12:22 PM Oscar Segarra <[email protected]> > wrote: > >> Hi, >> >> I'd like to test and script the adding monitors process adding one by one >> monitors to the ceph infrastructure. >> >> Is it possible to have two mon's running on two servers (one mon each) >> --> I can assume that mon quorum won't be reached until both servers are up. >> >> Is this right? >> >> I have not been able to find any documentation about the behaviour of the >> sistem with just two monitors (or an even number of them). >> >> thanks a lot. >> _______________________________________________ >> ceph-users mailing list >> [email protected] >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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