Re: [Condor-users] How To TroubleShoot Flocking

[Erik Paulson <epaulson@xxxxxxxxxxx>]

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. 

-Erik