Re: [Condor-users] Reading /dev/random

[Alain EMPAIN <alain.empain@xxxxxxxxx>]

Hello Olaf,

I do not know the detail of your problem, but I wonder if the 
environment variable RANDOM (at least when using bash) is not your 
solution :

echo $RANDOM
21102
echo $RANDOM
6921

If you use a wrapper script to build the command file, it will be easy 
to provide an ever changing random value to the executable if you put it 
inside every job arguments, before the queue command.

	Cheers,

	Alain


Olaf Lenz wrote:
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> Hello!
>
> Daniel Forrest wrote:
> | The root cause is that the Condor library uses stat() to see how big a
> | file is before trying to read from it.
>
> Wow! Thanks for the answer.
>
> | The answer to question 1 is to add "Local_Files = /dev/random" to your
> | job submission file.
>
> Using the "Local_Files" - solution does not work in my case, as the
> "/dev/random" device does not work on the actual computing nodes, but
> only on the submitting host. Therefore, the read call SHOULD be executed
> on the submitting and not on the executing host.
>
> | The answer to question 2 is for the Condor people to answer.  I think
> | it's a bug because there is no reason for the read() to fail.
>
> I would consider this a bug, too. Especially as it simply changes the
> semantics of fread().
>
> Olaf
>
> P.S. Sorry, Daniel, that you get this reply twice, but I forgot to send
> the copy to the mailing list.
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--
------------------------------------------------------------
Dr Alain EMPAIN  <alain.empain@xxxxxxxxx> <alain@xxxxxxxxxx>
      Bioinformatics, Molecular Genetics,
      Fac. Med. Vet., University of LIEGEe, Belgium
      Bd de Colonster, B43   B-4000 LIEGEe (Sart-Tilman)
WORK: +32 4 366 4159         FAX: +32 4 366 4122
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