Hello, another issue we have experienced with qemu VMs (qemu 2.0.0) with ceph-0.80 on Ubuntu 14.04 managed by opennebula 4.10.1: The VMs are completly frozen when rebalancing takes place, they do not even respond to ping anymore. Looking at the qemu processes they are in state "Sl". Is this a known problem / have others seen this behaviour? I have not yet tuned any backfilling parameters and it is a cluster of 3 hosts with one host having 6 osds and two 1 one (so 8 osds in total). Our qemu runs with these rbd related options: qemu-system-x86_64 ... -drive file=rbd:one/one-38:id=libvirt:key=...:auth_supported=cephx\;none:mon_host=kaffee.private.ungleich.ch\;wein.private.ungleich.ch\;tee.private.ungleich.ch,if=none,id=drive-ide0-0-0,format=raw,cache=none Cheers, Nico -- New PGP key: 659B 0D91 E86E 7E24 FD15 69D0 C729 21A1 293F 2D24 _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com