A while ago, I managed to have this working but this was really tricky. See my comment here: https://github.com/ceph/ceph-ansible/issues/9#issuecomment-37127128 One use case I had was a system with 2 SSD for the OS and a couple of OSDs. Both SSD were in RAID1 and the system was configured with lvm already. So we had to create LVs for each journals. > On 24 Feb 2015, at 14:41, Jörg Henne <hennejg@xxxxxxxxx> wrote: > > 2015-02-24 14:05 GMT+01:00 John Spray <john.spray@xxxxxxxxxx>: > > I imagine that without proper partition labels you'll also not get the benefit of e.g. the udev magic > that allows plugging OSDs in/out of different hosts. More generally you'll just be in a rather non standard configuration that will confuse anyone working on the host. > Ok, thanks for the heads up! > > Can I ask why you want to use LVM? It is not generally necessary or useful with Ceph: Ceph expects to be fed raw drives. > I am currently just experimenting with ceph. Although I have a reasonable number of "lab" nodes, those nodes are shared with other experimentation and thus it would be rather inconvenient to dedicate the raw disks exclusively to ceph. > > Joerg Henne > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com Cheers. –––– Sébastien Han Cloud Architect "Always give 100%. Unless you're giving blood." Phone: +33 (0)1 49 70 99 72 Mail: sebastien.han@xxxxxxxxxxxx Address : 11 bis, rue Roquépine - 75008 Paris Web : www.enovance.com - Twitter : @enovance _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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