On 03/08/2013 09:35 AM, Stefan Hajnoczi wrote: > Please try using virtio-blk instead of IDE. there is no difference if I use virtio-blk. > If the guest still jerks try using the Linux rbd block driver instead of > QEMU -drive rbd:. I haven't used Ceph much but there should be > documentation on attaching a RADOS block device to your Linux host. > Tell QEMU to use the RADOS block device like a regular file (you are now > using the kernel driver instead of QEMU code to talk to the Ceph > cluster). This doesn't work yet on the linux-kernel with format 2 images. Format 2 is capable of read/write snapshots and cooler cloning-stuff. I need this for backup-reasons. > Please let us know the outcome. If you find that virtio-blk does not > make much difference but using the kernel rbd driver does, then this > suggests there is a bug in QEMU's block/rbd.c. I'm pretty sure there is, other ceph users reported the same problems that I've found. The ceph developers are looking into it. > Stefan Wolfgang -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
