[linux-lvm] snapshot with 2.6.5 kernel

Heinz Mauelshagen mauelshagen at redhat.com
Tue May 11 11:13:22 UTC 2004

On Sun, May 02, 2004 at 11:42:05PM -0700, Karen Shaeffer wrote:
> Hello,
> I am running a patched 2.6.5 kernel and using lvm2. Everything
> looks ok, but the snapshot may be having problems. Else I just
> may be ignorant about how to use the snapshot.
> Here is what I am doing on a generic X86 server. I create a logical
> volume group out of a number of PEs that are properly configured. Then I
> create a logical volume. Then I start to dump a very large tar file
> into the logical volume. As this tar file is inflating the files into
> the logical volume, I then simultaneously create a snapshot volume of
> the recently created logical volume. The very large tar archive that
> was in the process of inflating its contents continues for a while,
> but finally just crashes and hangs at some point.
> Am I missunderstanding how to use snapshot here? Or is this just
> severly broken software? Any advise is appreciated.

You should be able to create a snapshot fine in ythat situation, even though
the creation will happen slow under load.

Can you repeat the case ?
Do you have an oops ? If so, please provide the ksymoops output
for further analysis of the problem.

> Thanks,
> Karen
> -- 
>  Karen Shaeffer
>  Neuralscape, Palo Alto, Ca. 94306
>  shaeffer at neuralscape.com  http://www.neuralscape.com
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Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***


Heinz Mauelshagen                                 Red Hat GmbH
Consulting Development Engineer                   Am Sonnenhang 11
                                                  56242 Marienrachdorf
Mauelshagen at RedHat.com                            +49 2626 141200
                                                       FAX 924446

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