Thanks a lot Greg, nice to hear! 2017-08-15 21:17 GMT+02:00 Gregory Farnum <[email protected]>:
> 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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