Alex Leake <A.M.D.Leake@...> writes: > > Hello Michael, > > I maintain a small Ceph cluster at the University of Bath, our cluster consists of: > > Monitors: > 3 x Dell PowerEdge R630 > > - 2x Intel(R) Xeon(R) CPU E5-2609 v3 > - 64GB RAM > - 4x 300GB SAS (RAID 10) > > OSD Nodes: > 6 x Dell PowerEdge R730XD & MD1400 Shelves > > - 2x Intel(R) Xeon(R) CPU E5-2650 > - 128GB RAM > - 2x 600GB SAS (OS - RAID1) > - 2x 200GB SSD (PERC H730) > - 14x 6TB NL-SAS (PERC H730) > - 12x 4TB NL-SAS (PERC H830 - MD1400) > > Please let me know if you want any more info. > > In my experience thus far, I've found this ratio is not useful for cache tiering etc - the SSDs are in a > separate pool. > > If I could start over, I'd go for fewer OSDs / host - and no SSDs (or a much better ratio - like 4:1). > > Kind Regards, > Alex. > _______________________________________________ > ceph-users mailing list > ceph-users <at> lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > I'm really glad you noted this, I was just following Redhat/SuperMicro deployment reference architecture (https://www.redhat.com/en/files/resources/en-rhst-cephstorage-supermicro- INC0270868_v2_0715.pdf) page 11 noted 12 disks per 7xx intel ssd. So I was debating if it might have been suitable. I try and have only 4 spinning disks per SSD cache. If I get 4TB NL-SAS drives, how big would the SSD need to be? _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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