[CP2K:161] Re: merged wannier center and coordinate output file

Teodoro Laino teodor... at gmail.com
Mon Jul 9 19:58:17 CEST 2007


just to share my experience:
on our (CSCS) XT3 machine IT people installed a special library  
(iobuf, vendor libraries from CRAY)..
this library does what you were describing in your e-mail.. is  
intercepting all IO operations and keeps them in memory and only when  
the IO buffer is full (~ 100 MB per node) everything is flushed.. in  
this way all the problems related to the scalability of the code due  
to IO operations are highly dumped..

On 9 Jul 2007, at 19:31, Axel wrote:

> this may not be a big issue for most of the current machine and
> users, but i expect that more and more machines will have to use
> parallel file systems like lustre, GPFS and alike and at the same
> time, people want to run larger jobs faster on their new fancy
> machines,
> so this may become a much more important over the next few years.

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