[mvapich-discuss] non-consecutive rank to host mapping?

[Pawel Dziekonski]

On Mon, 18 Apr 2011 at 01:50:47PM -0400, Jonathan Perkins wrote:
> Pawel:
> Vaibhav is correct.  However the hostname:numprocs syntax is not
> currently supported by mpirun_rsh.

Hi,

yes, I have already realized that hostname:numprocs does not work. ;-)

Putting all hostnames in hostfile did the trick (for the record: PBS Pro 11
does not fill $PBS_NODEFILE with all hostnames if one uses select statement
without using mpiprocs resource).

thanks, P


> On Mon, Apr 18, 2011 at 1:14 PM, vaibhav dutt
> <vaibhavsupersaiyan9 at gmail.com> wrote:
> > Hi,
> >
> > Can you provide the contents of your hostfile. It seems your are
> > using cyclic rank placement.
> > For block rank placement, you should write the hostname no. of times as much
> > as there are
> > cores in a host i.e
> >
> > host1
> > host1
> > host1
> > host1
> > host2
> > host2
> > host2
> > host2
> >
> > will put rank 0,1,2,3 on host1 and 4,5,6,7 on host 2.
> > Whereas
> >
> > host1:4
> > host2:4
> >
> > will put rank 0,2,4,6 on host1 and 1,3,5,7 on host2.

-- 
Pawel Dziekonski <pawel.dziekonski at wcss.pl>
Wroclaw Centre for Networking & Supercomputing, HPC Department
Politechnika Wr., pl. Grunwaldzki 9, bud. D2/101, 50-377 Wroclaw, POLAND
phone: +48 71 3202079, fax: +48 71 3225797, http://www.wcss.wroc.pl