For our ~400 TB Ceph deployment, we bought: (2) R720s w/ dual X5660s and 96 GB of RAM (1) 10Gb NIC (2 interfaces per card) (4) MD1200s per machine ...and a boat load of 4TB disks! In retrospect, I would almost certainly would have gotten more servers. During heavy writes we see the load spiking up to ~50 on Emperor and warnings about slow OSDs, but we clearly seem to be on the extreme with something like 60 OSDs per box :) Cheers, Lincoln On Jan 16, 2014, at 4:09 AM, Cedric Lemarchand wrote: > > Le 16/01/2014 10:16, NEVEU Stephane a écrit : >> Thank you all for comments, >> >> So to sum up a bit, it's a reasonable compromise to buy : >> 2 x R720 with 2x Intel E5-2660v2, 2.2GHz, 25M Cache, 48Gb RAM, 2 x 146GB, SAS 6Gbps, 2.5-in, 15K RPM Hard Drive (Hot-plug) Flex Bay for OS and 24 x 1.2TB, SAS 6Gbps, 2.5in, 10K RPM Hard Drive for OSDs (journal located on each osd) and PERC H710p Integrated RAID Controller, 1GB NV Cache >> ? >> Or is it a better idea to buy 4 servers less powerful instead of 2 ? > I think you are facing the well known trade off between price/performances/usable storage size. > > More servers less powerfull will give you better power computation and better iops by usable To, but will be more expensive. An extrapolation of that that would be to use a blade for each To => very powerful/very expensive. > > > The choice really depend of the work load you need to handle, witch is not an easy thing to estimate. > > Cheers > > -- > Cédric > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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