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[Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request) |
Date: |
Wed, 19 Nov 2014 12:41:52 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 |
On 19/11/2014 12:39, Prof. Dr. Michael Schefczyk wrote:
> Dear Paolo,
>
> thank you very much for your prompt reply.
Hi,
please keep the replies on the mailing list. I've added the qemu-devel
mailing list, where more people should be able to see the message and
hopefully reply with something helpful.
Also, how do you do the backups?
Paolo
> For example, I have a guest named "gatewayb72.img" where the backup failed.
> If I thereafter try to create or delete a snapshot, the following reply
> occurs on the command line:
>
>
> address@hidden kvm02]# qemu-img snapshot -d gatewayb72 /kvm02/gatewayb72.img
> qemu-img: Could not open '/kvm02/gatewayb72.img': Could not read snapshots:
> File too large
>
>
> If I want to reboot that machine, I get the following error:
>
>
> Fehler beim Starten der Domain: Interner Fehler: Prozess wurde während der
> Verbindungsaufnahme zum Monitor beendet : qemu-kvm: -drive
> file=/kvm02/gatewayb72.img,if=none,id=drive-virtio-disk0,format=qcow2,cache=none:
> could not open disk image /kvm02/gatewayb72.img: Could not read snapshots:
> File too large
>
>
> Traceback (most recent call last):
> File "/usr/share/virt-manager/virtManager/asyncjob.py", line 100, in
> cb_wrapper
> callback(asyncjob, *args, **kwargs)
> File "/usr/share/virt-manager/virtManager/asyncjob.py", line 122, in tmpcb
> callback(*args, **kwargs)
> File "/usr/share/virt-manager/virtManager/domain.py", line 1220, in startup
> self._backend.create()
> File "/usr/lib64/python2.7/site-packages/libvirt.py", line 698, in create
> if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
> libvirtError: Interner Fehler: Prozess wurde während der Verbindungsaufnahme
> zum Monitor beendet : qemu-kvm: -drive
> file=/kvm02/gatewayb72.img,if=none,id=drive-virtio-disk0,format=qcow2,cache=none:
> could not open disk image /kvm02/gatewayb72.img: Could not read snapshots:
> File too large
>
>
> Based on the facts I can see, the file is not too large. When reading the
> first error, the file size was 13.8 GB, while the limit is 14.5 GB. The same
> does also happen with files which are only, for example 6 GB big, while their
> limit is also 14.5 GB. Therefore, I think that the "file too large" really
> stands for something else.
>
> Can I provide any additional information?
>
> Regards,
>
> Michael
> ___________________________________________________________
> Technische Universität Dresden
> Fakultät Wirtschaftswissenschaften
> Lehrstuhl für Entrepreneurship und Innovation
> Prof. Dr. Michael Schefczyk
> D-01062 Dresden
>
> Fon: +49-3 51-4 63-3 68 81
> Fax: +49-3 51-4 63-3 68 83
> www.gruenderlehrstuhl.de
>> Since some months ago, I am facing the problem, that backups fail
>> unpredictably. A failed backup does not generate a backup file and
>> thereafter, snapshots can no longer be created or deleted and the
>> guest cannot be started anymore. The resulting error message is "File
>> too large".
>
> Who is reporting the "File too large" error? Can you please include the
> error in full detail?
>
> Paolo
>
- [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request),
Paolo Bonzini <=
- Re: [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request), Max Reitz, 2014/11/19
- Re: [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request), Prof. Dr. Michael Schefczyk, 2014/11/19
- Re: [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request), Paolo Bonzini, 2014/11/19
- Re: [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request), Prof. Dr. Michael Schefczyk, 2014/11/19
- Re: [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request), Paolo Bonzini, 2014/11/19
- Re: [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request), Eric Blake, 2014/11/19
- Re: [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request), Prof. Dr. Michael Schefczyk, 2014/11/19
- Re: [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request), Eric Blake, 2014/11/19
- Re: [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request), Prof. Dr. Michael Schefczyk, 2014/11/22
- Re: [Qemu-devel] "File too large" error from "qemu-img snapshot" (was Re: AW: Bug Repoting Directions Request), Paolo Bonzini, 2014/11/24