The biggest downside that I've found is the log volume that mons create eats a lot of io. I was running mons on my OSDs previously, but in my current dpeloyment I've moved them to other hardware and noticed a perceptible load reduction on those nodes that were formerly running mons.
QH On Thu, Jun 25, 2015 at 10:21 AM, Lazuardi Nasution <mrxlazuar...@gmail.com> wrote: > Hi, > > I'm looking for pros and cons of combining MON and OSD functionality on > the same nodes. Mostly recommended configuration is to have dedicated, odd > number MON nodes. What I'm thinking is more like single node deployment but > consist more than one node, if we have 3 nodes we have 3 MONs with 3 OSDs. > Since MON will only consume small resources, I think MON load will not > degrade OSD performance significantly. If we have odd number of nodes, we > can still maintain the quorum of MON with this way. Any idea? > > Best regards, > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >
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