[Pw_forum] Performance problems due to files in outdir

[Henning Glawe]

On Wed, May 08, 2013 at 05:00:27PM +0200, Paolo Giannozzi wrote:
> On Wed, 2013-05-08 at 15:09 +0200, Henning Glawe wrote:
> > As far as I understand the code, all IO to outdir is performed via IOTK;
> 
> actually only "small" xml files and files in "collected" format are
> written using iotk (the latter, in binary format). Large temporary
> scratch files are written using plain binary fortran I/O. 

Ok. This complicates the issue a bit. In any case, the performance problems are
mainly related to having 'many' files, not 'big' files.

> Anyway: is your problem solved? if not, please specify what you need
> data file for.

Basically just for running some code patched into pp.x.

-- 
Mit freundlichen Grüßen
Henning Glawe

Max-Planck-Institut für Mikrostrukturphysik
Weinberg 2, 06120 Halle (Saale), Germany http://www.mpi-halle.de/~theory
Phone: +49-345-5582-613 Fax: +49-345-5511223  Email: glawe at mpi-halle.de