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

Stefan Sänger stsaenger at googlemail.com
Wed Sep 28 14:33:46 CEST 2011

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?


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