Bug#626942: ecs: cs_partition is missing

[David Monfort]

Hi Martin, Sylvestre,

To begin with, sorry for my deafening silence...

A partitioning library (Scotch or Metis) is not required to run parallel
simulation as we have an internal partitioner based on a Space-Filling Curve
algorithm (with, say, a loss of 20 to 30% in terms of CPU time). Thus, the
warning saying that cs_partition is not available is not really an issue,
performance aside.

Moreover, the cs_partition executable is not mandatory to run SYRTHES
coupling simulation.
If relevant, could you precise why you cannot run SYRTHES coupling
simulations without it ?

Finally, as regards the completeness of the package, it would indeed be a
good idea to compile the preprocessor package with the Scotch library
dependency, but I'm not for an abort of the compilation if it is not found.

Regards,
David

On Mon, May 16, 2011 at 9:08 PM, Sylvestre Ledru <sylvestre at debian.org>wrote:

> Le lundi 16 mai 2011 à 16:18 +0200, Martin Isack a écrit :
> >
> > /usr/bin/cs_partition is still missing.
> It is indeed unexpected.
> From the build log, I can see that the detection is failing:
>
> https://buildd.debian.org/status/fetch.php?pkg=ecs&arch=i386&ver=2.0.1-2&stamp=1299547844
>
> configure: WARNING: do not use SCOTCH
> SCOTCH (Graph Partitioning) support: no
> even if the scotch package is installed
>
> David, I wonder if we should not stop the build if scotch cannot be
> found correctly, don't you think ?
>
> S
>
>
>
>
>
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