[libvirt] [RFC]: Snapshot API v3

Eric Blake eblake at redhat.com
Tue Mar 30 21:26:43 UTC 2010

On 03/30/2010 02:52 PM, Matthias Bolte wrote:
> 2010/3/30 Jiri Denemark <jdenemar at redhat.com>:
>> Hi.
>> ...
>>> /* NOTE: struct _virDomainSnapshot is a private structure, ala
>>>  * struct _virDomain.
>>>  */
>>> typedef struct _virDomainSnapshot virDomainSnapshot;
>>> /* Take a snapshot of the current VM state.  Throws an error if
>>>  * the VM is not currently running */
>>> virDomainSnapshotPtr virDomainSnapshotCreateXML(virDomainPtr domain,
>>>                                                 const char *xmlDesc,
>>>                                                 unsigned int flags);
>> This is probably a leftover from previous versions, but... why do we restrict
>> this API only for running VMs?
> Yep, if a domain it not running you'll just get a disk snapshot
> without a memory snapshot.

Is taking a halted disk snapshot something we might want to allow with a
flag, though?  For that matter, is this API useful for taking a disk
snapshot and disregarding a memory snapshot even of a running VM?

Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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