I think this is it: https://engage.redhat.com/inktank-ceph-reference-architecture-s-201409080939
You can also check out a presentation on Cern's Ceph cluster: http://www.slideshare.net/Inktank_Ceph/scaling-ceph-at-cern At large scale, the biggest problem will likely be network I/O on the inter-switch links. On Thu, Dec 18, 2014 at 3:29 PM, Robert LeBlanc <rob...@leblancnet.us> wrote: > > I'm interested to know if there is a reference to this reference > architecture. It would help alleviate some of the fears we have about > scaling this thing to a massive scale (10,000's OSDs). > > Thanks, > Robert LeBlanc > > On Thu, Dec 18, 2014 at 3:43 PM, Craig Lewis <cle...@centraldesktop.com> > wrote: > >> >> >> On Thu, Dec 18, 2014 at 5:16 AM, Patrick McGarry <patr...@inktank.com> >> wrote: >>> >>> >>> > 2. What should be the minimum hardware requirement of the server (CPU, >>> > Memory, NIC etc) >>> >>> There is no real "minimum" to run Ceph, it's all about what your >>> workload will look like and what kind of performance you need. We have >>> seen Ceph run on Raspberry Pis. >> >> >> Technically, the smallest cluster is a single node with a 10 GiB disk. >> Anything smaller won't work. >> >> That said, Ceph was envisioned to run on large clusters. IIRC, the >> reference architecture has 7 rows, each row having 10 racks, all full. >> >> Those of us running small clusters (less than 10 nodes) are noticing that >> it doesn't work quite as well. We have to significantly scale back the >> amount of backfilling and recovery that is allowed. I try to keep all >> backfill/recovery operations touching less than 20% of my OSDs. In the >> reference architecture, it could lose a whole row, and still keep under >> that limit. My 5 nodes cluster is noticeably better better than the 3 node >> cluster. It's faster, has lower latency, and latency doesn't increase as >> much during recovery operations. >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@lists.ceph.com >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >>
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