>> Just out of curiosity. Why you are using cephfs instead of rbd? [We're not using is *instead* of rbd, we're using it *in addition to* rbd. For example, our OpenStack (users') cinder volumes are stored in rbd.] To expand on what my colleague Jens-Christian wrote: > Two reasons: > - we are still on Folsom What we want to achieve is to have a shared "instance store" (i.e. "/var/lib/nova/instances") across all our nova-compute nodes, so that we can e.g. live-migrate instances between different hosts. And we want to use Ceph for that. In Folsom (but also in Grizzly, I think), this isn't straightforward to do with RBD. A feature[1] to make it more straightforward was merged in Havana(-3) just two weeks ago. > - Experience with "shared storage" as this is something our customers > are asking for all the time Yes, people want shared storage that they can access in a POSIXly way from multiple VMs. CephFS is a relatively easy way to give them that, though I don't consider it "production-ready" - mostly because secure isolation between different tenants is hard to achieve. -- Simon. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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