> I'm assuming Ceph/RBD doesn't have any direct awareness of this since > the file system doesn't traditionally have a "give back blocks" > operation to the block device. Is there anything special RBD does in > this case that communicates the release of the Ceph storage back to the > pool?
VMs running a 3.2+ kernel (iirc) can "give back blocks" by issuing TRIM. http://wiki.qemu.org/Features/QED/Trim -- Kyle _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
