[Wien] Why is "sleep $delay" commented out in lapw1para_lapw?

[Laurence Marks]

Dear David,

I think the answer to your question "why" is "because".

Often for things like this it is some combination of "seat of the
pants" gut instinct and KISS. I am not certain why I used 0.25 in my
version, and I think I have recently reduced it to 0.1. I will admit
that I never tested in great detail whether 0.25 was better or worse,
it really will depend heavily upon the cluster.

Similarly I suspect the delay between launching ssh was probably
removed as it did not seem to matter. My suggestion would be to put it
back and see if it helps.

I agree that it would be better to have this (and various other
things) set in parallel_options.

Not the most clear answer, sorry.

On Mon, Apr 6, 2015 at 11:32 AM, David Olmsted <olmsted at berkeley.edu> wrote:
> Hi,
>
>    There has been no response to my suggestion that in lapw1para_lapw, the
> line “#    sleep $delay” be changed to “sleep $delay”.  Perhaps I have not
> given enough information.  In the userguide there is no mention of “delay”.
> In the archive I find nothing explaining why the line is commented out.  (Or
> even explaining that it is commented out.)  In  lapw2para_lapw, for example,
> the “sleep $delay” line is actually in use, rather than commented out.  The
> same is true in some of the other scripts.  Why the difference in
> lapw1para_lapw?
>
>
>
> I am using version 14.2 on a  large linux cluster with TORQUE.   I was using
> a revised version of a parallel_options file from a post by Lawrence Marks
> which included “set delay   = 0.25”, and was surprised to discover this did
> not actually take effect in lapw1para_lapw.
>
>
>
> Thanks,
>
> David
>
>
>
> David Olmsted
>
> Assistant Research Engineer
>
> Materials Science and Engineering
>
> 210 Hearst Memorial Mining Building
>
> University of California
>
> Berkeley, CA 94720-1760
>
>



-- 
Professor Laurence Marks
Department of Materials Science and Engineering
Northwestern University
www.numis.northwestern.edu
Corrosion in 4D: MURI4D.numis.northwestern.edu
Co-Editor, Acta Cryst A
"Research is to see what everybody else has seen, and to think what
nobody else has thought"
Albert Szent-Gyorgi