Fedora 18 KVM online snapshot function experience

Fedora 18 KVM online snapshot experience fedora 18 has been released. One of the most exciting features in virtualization is online snapshot. In the past, KVM used to take snapshots and the virtual opportunity was automatically paused. Now, this problem has been overcome. Www.2cto.com lab environment: hardware Intel (R) Xeon (R) CPU E5540 @ 2.53 GHz 6G memory 80G sata hard drive software fedora 18 kernel 3.7.2-204. fc18.x86 _ 64 currently, virt-manager does not support snapshots and can only be operated through the virsh command line. Online snapshots only support virtual machines with raw and qcow2 disks. During the test, two virtual machines are created, w, test1, and w are in raw format, and test1 is in qcow2 format. Run the following command to create a snapshot and ping the VM all the time, snapshots are generated in an instant without packet loss. Virsh snapshot-create-as w snapshot1 "snapshot1 description" -- disk-only-atomicvirsh snapshot-create-as test1 snapshot1 "snapshot1 description" -- disk-only -- snapshots created by atomic and virtual machines disk image files together, snapshots are in qcow2 format. [Root @ localhost datapool] # export test01.snapshot1 [root @ localhost datapool] # qemu-img info test01.snapshot1image: test01.snapshot1file format: qcow2virtual size: 60G (64424509440 bytes) disk size: bytes: 65536 backing file:/datapool/test01.qcow2 [root @ localhost images] # qemu-img info w. snapshot1image: w. snapshot1file format: qcow2virtual size: 8.0G (8589934592 bytes) disk size: 6.6Mcluster _ size: 65536 backing file:/var/lib/libvirt/images/w. imgSnapshot list: id tag vm size date vm CLOCK1 snapshot2 6.3 M 14:29:06. 854 [root @ localhost images] # qemu-img info w. imgimage: w. imgfile format: rawvirtual size: 8.0G (8589934592 bytes) disk size: 0 [root @ localhost images] # Common commands: run www.2cto.com to list the Virtual Machine snapshot virsh # snapshot-list w Name Creation Time status snapshot snapshot1 13:29:32 + 0800 disk-snapshot snapshot2 2013-01-22 14:29:06 + 0800 running to roll back the virtual machine to the previous snapshot virsh snapshot-revert w snapshot2 changes the image of the VM, merge to the snapshot virsh blockpull -- domain w -- path/var/lib/libvirt/images/w. snapshot1 delete snapshot virsh snapshot-delete w snapshot2