<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> On 06/08/2012 09:13 PM, Xing.x.Gao wrote: <blockquote cite="mid:CAAHBLWFpp6tKsOoMZBdumeuSAjy4mY-evJXnBJE98K_MZvNTKw@mail.gmail.com" type="cite"> <pre wrap="">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) </pre> </blockquote> 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 <a class="moz-txt-link-freetext" href="http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/shared-storage-nfs-migration.html">http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/shared-storage-nfs-migration.html</a> Live KVM migration with virsh <a class="moz-txt-link-freetext" href="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">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</a> Please see "Live migration requirements" section: <a class="moz-txt-link-freetext" href="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">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</a> Good Luck! Alex </body> </html>