> On 03 Sep 2015, at 16:49, Paul Evans <p...@daystrom.com> wrote: > > Echoing what Jan said, the 4U Fat Twin is the better choice of the two > options, as it is very difficult to get long-term reliable and efficient > operation of many OSDs when they are serviced by just one or two CPUs. > I don’t believe the FatTwin design has much of a backplane, primarily sharing > power and cooling. That said: the cost savings would need to be solid to > choose the FatTwin over 1U boxes, especially as (personally) I dislike lots > of front-side cabling in the rack.
I never used SuperMicro blades, but with Dell blades there's a single "backplane" board to which the blades plug-in for power and IO distribution. We had it go bad in a way where the blades would work until removed, and wouldn't power on once plugged-in again. Restart of the chassis didn't help and we had to change the backplane. I can't imagine SuperMicro would be much different, there are some components that just can't be changed while the chassis is in operation. > -- > Paul Evans > > >> On Sep 3, 2015, at 7:01 AM, Gurvinder Singh <gurvindersinghdah...@gmail.com >> <mailto:gurvindersinghdah...@gmail.com>> wrote: >> >> Hi, >> >> I am wondering if anybody in the community is running ceph cluster with >> high density machines e.g. Supermicro SYS-F618H-OSD288P (288 TB), >> Supermicro SSG-6048R-OSD432 (432 TB) or some other high density >> machines. I am assuming that the installation will be of petabyte scale >> as you would want to have at least 3 of these boxes. >> >> It would be good to hear their experiences in terms of reliability, >> performance (specially during node failures). As these machines have >> 40Gbit network connection it can be ok, but experience from real users >> would be great to hear. As these are mentioned in the reference >> architecture published by red hat and supermicro. >> >> Thanks for your time. >> _______________________________________________ >> ceph-users mailing list >> ceph-users@lists.ceph.com <mailto:ceph-users@lists.ceph.com> >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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