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Re: [Condor-users] How To TroubleShoot Flocking

On Fri, Jul 07, 2006 at 03:46:00PM +0100, Kewley, J (John) wrote:
> I have still never quite worked out why
> "NOTE: The combination of:
>   should_transfer_files = IF_NEEDED
>   when_to_transfer_output = ON_EXIT_OR_EVICT
>  would produce undefined file access semantics. Therefore, this combination is
>  prohibited by condor_submit."
> It is obviously something obvious, but I haven't twigged it yet.

To support transfering modified files, files in-flight live in the $SPOOL
directory, which is usually not shared. This can cause problems when your
job runs on machines that need file transfer, get evicted, and starts
running again on a machine that does not need file transfer.