[CentOS-virt] proper way to snapshot
aurfalien
aurfalien at gmail.com
Thu Apr 26 14:21:26 EDT 2012
On Apr 26, 2012, at 2:15 PM, Nux! wrote:
> On 26.04.2012 19:12, aurfalien wrote:
>> On Apr 26, 2012, at 1:54 PM, Nux! wrote:
>>
>>> On 26.04.2012 18:23, aurfalien wrote:
>>>> Hi,
>>>>
>>>> While there are a few howtos floating around, what is the standard
>>>> way to snapshot guests?
>>>>
>>>> I went through and converted from raw to pre allocated meta data
>>>> qcow2 images for this purpose.
>>>>
>>>> Some howtos suggest to do an xml snapshot file as so;
>>>>
>>>> <domainsnapshot>
>>>> <name>UbuntuServer_10.10-16032011</name>
>>>> <description>Snapshot of OS install and updates</description>
>>>> </domainsnapshot>
>>>>
>>>> And then to run as so;
>>>>
>>>> virsh snapshot-create UbuntuServer_10.10 UbuntuServer_10.10-ss.xml
>>>>
>>>> Seems a bit over kill.
>>>>
>>>> I was thinking more along the lines of this;
>>>>
>>>> qemu-img snapshot -c $date $filename
>>>>
>>>> qemu-img convert -f qcow2 -O qcow2 -s $date $filename
>>>> $filename-$date
>>>>
>>>> Or something like this.Anyways, hoping to see how you all are doing
>>>> this for best practice sort of thing.
>>>
>>> Hi,
>>>
>>> I just use LVM snapshots; it's the fastest, most reliable way I
>>> could
>>> come with.
>>
>> Hi,
>>
>> I don't have LVMs.
>>
>> But if I did, would it be possible to only snapshot a directory or
>> will it snapshot the entire file system?
>
> Assuming you use LVM on the host to provide the virtual machine with a
> (virtual) HDD, then snapshotting that will obviously be (virtual)
> disk-wise.
I used a simple non LVM partitioning scheme.
Can I do directory based snapshots in LVM or is it the entire FS?
I can re implement or redo my host to use LVM.
- aurf
More information about the CentOS-virt
mailing list