Hello All, I have made more progress on the proposed Livebackup feature for qemu and qemu-kvm. Based on Jes' feedback, I have switched over to using command line parameters instead of specific named files. So, a typical command line looks like this: # ./x86_64-softmmu/qemu-system-x86_64 -drive \ file=/dev/kvm_vol_group/kvm_root_part,boot=on,if=virtio,livebackup=on \ -drive file=/dev/kvm_vol_group/kvm_disk1,if=virtio,livebackup=on \ -m 512 -net nic,model=virtio,macaddr=52:54:00:00:00:01 \ -net tap,ifname=tap0,script=no,downscript=no \ -vnc 0.0.0.0:1000 -usb -usbdevice tablet \ -livebackup_dir /root/kvm/livebackup -livebackup_port 7900 Note the new option livebackup=on in the drive parameters, and the two new parameters -livebackup_dir and -livebackup_port Here's my strategy for rigorous testing of this new code: I have created two virtual disks in LVM logical volumes, and added code in qemu livebackup to create a LVM snapshot as soon as livebackup_client connects to qemu and creates a livebackup snapshot. Then I binary compare the livebackup backed up version of the virtual disk image with the LVM snapshot that was created by using 'cmp'. The backup images are a bit for bit match! As always, all information is available at: http://wiki.qemu.org/Features/Livebackup I have also sent in my application to make a presentation at the qemu forum 2011. In the meantime, I invite feedback on livebackup. Specifically, I am interested in scrutiny of my testing methodology. Also, I plan to add encryption (probably SSL) to the livebackup TCP connection, and some form of authentication. Any thoughts, feedback? Thanks, Jagane -- 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
