Mirror the OS disks, use 10 disks for 10 OSD's > On Aug 12, 2016, at 7:41 AM, Félix Barbeira <fbarbe...@gmail.com> wrote: > > Hi, > > I'm planning to make a ceph cluster but I have a serious doubt. At this > moment we have ~10 servers DELL R730xd with 12x4TB SATA disks. The official > ceph docs says: > > "We recommend using a dedicated drive for the operating system and software, > and one drive for each Ceph OSD Daemon you run on the host." > > I could use for example 1 disk for the OS and 11 for OSD data. In the > operating system I would run 11 daemons to control the OSDs. But...what > happen to the cluster if the disk with the OS fails?? maybe the cluster > thinks that 11 OSD failed and try to replicate all that data over the > cluster...that sounds no good. > > Should I use 2 disks for the OS making a RAID1? in this case I'm "wasting" > 8TB only for ~10GB that the OS needs. > > In all the docs that i've been reading says ceph has no unique single point > of failure, so I think that this scenario must have a optimal solution, maybe > somebody could help me. > > Thanks in advance. > > -- > Félix Barbeira. > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Rick Stehno
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