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Re: [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re


From: Prof. Dr. Michael Schefczyk
Subject: Re: [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request)
Date: Wed, 19 Nov 2014 12:07:47 +0000

Yes! My level of knowledge is that one uses the qcow2 format in order to be 
able to create live snapshots/backups. Otherwise one would tend to use the more 
efficient raw format. Is this not correct and did I apply the backup mechanism 
in the wrong way?


-----Ursprüngliche Nachricht-----
Von: Paolo Bonzini [mailto:address@hidden 
Gesendet: Mittwoch, 19. November 2014 12:54
An: Prof. Dr. Michael Schefczyk; qemu-devel
Betreff: Re: AW: "File too large" error from "qemu-img snapshot" (was Re: AW: 
Bug Repoting Directions Request)



On 19/11/2014 12:48, Prof. Dr. Michael Schefczyk wrote:
> 
> Thank you very much. To execute the backup, I run a script. For the machine 
> in question, it looks as follows:
> 
> #!/bin/bash
> dt=`date +%y%m%d`
> qemu-img snapshot -c gatewayb72 /kvm02/gatewayb72.img qemu-img convert  
> -f qcow2 -O qcow2 /kvm02/gatewayb72.img /backup/gatewayb72$dt.img 
> qemu-img snapshot -d gatewayb72 /kvm02/gatewayb72.img /bin/find 
> /backup/* -mtime +100 -exec rm {} \;

Is it done while the VM is running?

Paolo

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