If your crushmap is set to replicate by host you would only ever have one copy on a single host, no matter how many OSD’s you placed on a single NVME/disk.
But yes you would not want to mix OSD based rules and multiple OSD per a physical disk. On Tue, 5 Mar 2019 at 7:54 PM, Marc Roos <m.r...@f1-outsourcing.eu> wrote: > > I see indeed lately people writing about putting 2 osd on a nvme, but > does this not undermine the idea of having 3 copies on different > osds/drives? In theory you could loose 2 copies when one disk fails??? > > > > > -----Original Message----- > From: Darius Kasparaviius [mailto:daz...@gmail.com] > Sent: 05 March 2019 10:50 > To: ceph-users > Subject: [ceph-users] Ceph cluster on AMD based system. > > Hello, > > > I was thinking of using AMD based system for my new nvme based cluster. > In particular I'm looking at > https://www.supermicro.com/Aplus/system/1U/1113/AS-1113S-WN10RT.cfm > and https://www.amd.com/en/products/cpu/amd-epyc-7451 CPU's. Have anyone > tried running it on this particular hardware? > > General idea is 6 nodes with 10 nvme drives and 2 osds per nvme drive. > _______________________________________________ > ceph-users mailing list > 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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