On 06/08/2012 09:13 PM, Xing.x.Gao wrote:

i am sorry,node1 is host1 ,it's my input error,
i don't use share storage ,and the debug log level outputs a lot in
the /var/log/libvirt/libvirtd.log on host1.example.com ,
the win7.img is a qcow2 img file ,and i copy it from
server.example.com(source) to node1.example.com(dest)

It's a wrong method to copy guest image to target host, you require a NFS
to share guest image at least, please refer to the following link:

Shared storage example: NFS for a simple migration
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/shared-storage-nfs-migration.html

Live KVM migration with virsh
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/sect-Virtualization-KVM_live_migration-Live_KVM_migration_with_virsh.html

Please see "Live migration requirements" section:
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/chap-Virtualization_Administration_Guide-KVM_live_migration.html#item-Virtualization-Live_migration_requirements-Migration_requirements


Good Luck!
Alex

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