On Fri, Feb 23, 2018 at 5:05 AM Dennis Benndorf < dennis.bennd...@googlemail.com> wrote:
> Hi, > > at the moment we use ceph with one big rbd pool and size=4 and use a > rule to ensure that 2 copies are in each of our two rooms. This works > great for VMs. But there is some big data which should be stored online > but a bit cheaper. We think about using cephfs for it with erasure > coding and k=4 and m=4. How would the placement of the chunks work, I > mean is the above possible for erasure coding also? > Yes. It's mostly the same procedure as I imagine you used on your replicated pool. Except you'd use "indep" instead of "rep" and you'd be choosing 4 leafs out of each DC instead of 2. -Greg > > In addition, is there anybody out there using cephfs with erasure coding > in big scale (hundreds of TB) and who can tell me something about > his/her experience on stability? > > Thanks in advance, > Dennis > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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