[PVE-User] WG: difference b/w backup types

Muhammad Yousuf Khan sirtcp at gmail.com
Wed Sep 28 16:10:46 CEST 2011

Thank for the info.well some time backup got failed while copying to the
network folder. i have asked this question previously, people have their own
perception some say it is because you have 100mbps LAN card  so i changed it
to 1gb and now still having the same problem. so i taught if i can manage to
minimize some process burden during backup that would be fine i can bear 1
or 2 hours down time for a single VM at night when no one is in office. so
that was the reason i asked thus i could minimize the failure ratio of
backup. i am backing up single VM every week and this is a 4th time that it
couldnt copy. therefore i was kinda troubleshooting also .

Thank you,

On Wed, Sep 28, 2011 at 5:33 PM, Stefan Sänger <stsaenger at googlemail.com>wrote:

> On 28.09.2011 14:16, Muhammad Yousuf Khan wrote:
>> still not an answer to my question. i already read this information on
>> wikki. but i wanted to know which one is more faster and low resource
>> intensive.
> Well - there is no general answer to that question, because you have to
> consider this with different aspects in mind.
> So, if you compare these different backup scenarios, obviously
> - snapshot is fastest concerning downtime of your VM, as there is
>  virtually no downtime - but it will need the most resources since the
>  VM itself is running as well as the backup process.
> - suspend and stop need significantly less resources since during
>  backup only the bakup task is running
> - stop will need more time than suspend since the VM is shutdown before
>  performing the backup and afterwards has to boot up again
> - suspend will need little more resources since the VM is not shut down
>  and hence its status has to be kept in memory during backup
> But - these conclusions are fairly simple. I really wonder why you ask
> these questions, are you going to start a de3tailed discussion on backing up
> VMs?
> Stefan
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