On 11/02/2011, at 9:04 PM, Osier Yang wrote: <snip>
But what does 'persistent' mean? I mean, when transferring a VM to a destination, it will be available on the destination when migration completes, so what does 'persistent' mean in this context?
It means the domain conf will be saved on your disk, e.g. /etc/libvirt/qemu/$domain.xml. Without specifying it, your domain will be disappear after destroying, that means your domain is transicient, opposite meaning of persistent.
This might help explain the difference as well: http://wiki.libvirt.org/page/VM_lifecycle#Transient_guest_domains_vs_Persist... There is also migration info on that page, but it's fairly basic so not sure how useful. Worth checking, just in case though. :) Regards and best wishes, Justin Clift