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

[Muhammad Yousuf Khan]

thanks for the utility lets see  if it works for me.  :)

Thank you,

On Wed, Sep 28, 2011 at 8:12 PM, obj at jltechinc.com <obj at jltechinc.com>wrote:

>  I concur, we use the high-performance, enterprise-grade, openSource *
> BackupPC* with data-deduplication.
>
>     http://backuppc.sourceforge.net/
>
> -Jeremiah
>
> Stefan Sänger said the following on 09/28/2011 11:05 AM:
>
> Hi Muhammad,
>
> so I see that your case is a bit more production related and harder to
> judge. Have you considered other backup solutions?
>
> Because I'm not sure if proxmox VM backup is the right choice for your
> problem. Basically all it provides is a disk image, and if you don't take
> care of backing up these images all that you have left when you
> run into problems with your VM is the disk image of the last backup run.
>
> It is definitely not the best choice for a reliable backup - if you run a
> database and just perform snapshots, you may not be able to restore tha
> latest database status.
>
> I prefer to look deeper into this and choose a real backup solution
> to cope with this. That even gives me the possibility to do incremental
> backups with regular full backups and weekly kvm disk images.
>
> But of course all that depends on what you are running inside the VM.
>
>
> Stefan
>
> On 28.09.2011 16:10, Muhammad Yousuf Khan wrote:
>
>
> 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
> <mailto:stsaenger at googlemail.com> <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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