[Wien] Speedup of heavy cases?

[Torsten Andersen]

Dear all,

I have some $cases that produce multi-GB vector files, and the time 
spent in I/O in lapwso and lapw2c are becoming a problem, and the 
problem only gets worse if I use k-point parallelization on an 
8-processor machine. As lapw1 only writes the vector files, it does not 
seem to cause any trouble with the I/O.

Will it help me if I do a simple rewrite of runsp_lapw to support 2 
scratch partitions, and have the two partitions on two physically 
different disks? I have in mind, that lapwso could read from the usual 
$SCRATCH and write to another partition, say $SCRTWO, and that lapw2c 
does it the opposite way around afterwards (the help* files), or are 
there more complications to expect from this?

Best regards,
Torsten Andersen.


-- 
Dr. Torsten Andersen                     TA-web: http://deep.at/myspace/
AG Hübner, Department of Physics, Kaiserslautern University, and
Condensed Matter Theory Group, Department of Physics, Uppsala University
Web: http://www.fysik4.fysik.uu.se/         http://www.physik.uni-kl.de/