> 1. Is it possible to install Ceph and Ceph monitors on the the XCP > (XEN) Dom0 or would we need to install it on the DomU containing the > Openstack components? I'm not a Xen guru but in the case of KVM I would run the OSDs on the hypervisor to avoid virtualization overhead. > 2. Is Ceph server aware, or Rack aware so that replicas are not stored > on the same server? Yes, placement is defined with your crush map and placement rules. > 3. Are 4Tb OSD’s too large? We are attempting to restrict the qty of > OSD’s per server to minimise system overhead Nope! > Any other feedback regarding our plan would also be welcomed. I would probably run each disk as it's own OSD, which means you need a bit more memory per host. Networking could certainly be a bottleneck with 8 to 16 spindle nodes. YMMV. -- Kyle _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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