Le jeudi 08 août 2013 à 18:04 -0700, Sage Weil a écrit : > On Fri, 9 Aug 2013, Olivier Bonvalet wrote: > > Le jeudi 08 ao?t 2013 ? 09:43 -0700, Sage Weil a ?crit : > > > On Thu, 8 Aug 2013, Olivier Bonvalet wrote: > > > > Hi, > > > > > > > > from now I have 5 monitors which share slow SSD with several OSD > > > > journal. As a result, each data migration operation (reweight, recovery, > > > > etc) is very slow and the cluster is near down. > > > > > > > > So I have to change that. I'm looking to replace this 5 monitors by 3 > > > > new monitors, which still share (very fast) SSD with several OSD. > > > > I suppose it's not a good idea, since monitors should have a dedicated > > > > storage. What do you think about that ? > > > > Is it a better practice to have dedicated storage, but share CPU with > > > > Xen VM ? > > > > > > I think it's okay, as long as you aren't wroried about the device filling > > > up and the monitors are on different hosts. > > > > Not sure to understand : by ?dedicated storage?, I was talking of the > > monitor. Can I put monitors on Xen ?host?, if they have dedicated > > storage ? > > Yeah, Xen would work fine here, although I'm not sure it is necessary. > Just putting /var/lib/mon on a different storage device will probably be > the most important piece. It sounds like it is storage contention, and > not CPU contention, that is the source of your problems. > > sage >
Yop, the transition worked fine, thanks ! Newer mon are really fasters, and now I can migrate data without downtime. Good job devs ! Thanks again. Olivier _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
