As reported by Eneko Lacunza, ceph/rbd by default use writethrough even if writeback is defined, until a flush is detected.
We currently use writeback without sendind any flush for 3 things: qemu-img convert : (default is unsafe, but we force writeback in qemuserver) vma restore on target destination vmstate snapshot The patches serie set unsafe opening (BDRV_O_NO_FLUSH). And also fix the rbd drive to disable cache_writethtrough_until_flush if cache=unsafe @Eneko Lacunza : Can you test it ? I have rewrote your last patch (http://pve.proxmox.com/pipermail/pve-devel/2016-July/022226.html), to handle vma extract and vmstate snapshot _______________________________________________ pve-devel mailing list pve-devel@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
