Re: [libvirt] question about save/restore domain

On 07/03/2012 06:42 AM, Jovanka Gulicoska wrote: Can you point out the URL to that documentation? It's slightly incorrect, and worth patching to make clearer if that would help the next person to read them. virDomainRestore can be used to restore a domain as many times as you want, _provided_ that before each restore, you _manually_ restore the disk state back to what it was at the time of the virDomainSave. virDomainManagedSave uses virDomainSave under the hood to create a save image which is then autoloaded at the next virDomainStart, but because it is auto-managed, it can only be restored once (on restoring a managedsave domain, the managed state is discarded). virDomainSnapshotCreateXML is able to create a system checkpoint of both disk and RAM state at once, such that virDomainSnapshotRevert then restores disk state and memory state in one operation, instead of leaving the disk state to manual operation. It all depends on what your end goal is with doing a save/load of a VM. Do you need fast saves, or is it okay if the save takes several seconds? Will you be loading the state exactly once, or do you plan to make it something that the user can revert to multiple times in a row? Feel free to ask more questions on the topic; I'll do my best to answer them. -- Eric Blake eblake(a)redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org