Il 11/Feb/2015 19:10 "Adam Litke" <alitke@redhat.com> ha scritto:
>
> On 11/02/15 17:30 +0000, Soeren Malchow wrote:
>>
>> Dear all,
>>
>> i am a little lost, i tried quite a few things with the snapshots, so
>> far with python scripts I can iterate through the existing machines,
>> take one, make a snapshot and all this.
>>
>> However, there are 2 problems I can not get around:
>>
>> 1. even when on 3.5.1 I can not delete a snapshot on a running VM, if
>> I understood that correctly this relies on the Live Merge Feature
>> where the code is available in vdsm already but it needs a certain
>> libvirt version !?!?  So question here is, can I delete a snapshot or
>> not ? can I use only the rest API not python  (excuse me I am not a
>> developer)
>
>
> I can answer this one at least.  For now, Centos 7 is lacking a new
> enough version of libvirt to support Live Merge (> 1.2.7).  The
> virt-preview repository for Fedora is shipping a newer libvirt.  You
> can check if vdsm will support live merge by executing the following
> on the host in question:
>
>   sudo vdsClient -s 0 getVdsCaps | grep liveMerge
>
> RHEL 7.1 will be shipping a version with the neccessary backports to
> support live merge so I imagine Centos 7.1 will pick those up
> automatically?
>
>
> --
> Adam Litke
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I confirm that at least on f21 tc3 I was able to live delete snapshots,  also into the active layer.
See:
http://lists.ovirt.org/pipermail/users/2014-November/029450.html
and the whole thread.
I hope that RHEL 7.1 (and CentOS) will have the merging into the active layer too.... and not only into the chain history.

Gianluca