Am 20.02.2009 um 16:23 schrieb Prentice Bisbal:
Bogdan Costescu wrote:
On Fri, 20 Feb 2009, Glen Beane wrote:
I looked into SGE a long time ago, but I found the MPI support
terrible when compared to TORQUE/PBS Pro
Indeed and AFAIK is still in a similar state today. There was talk
for a
long time on the SGE devel list for a TM API to be added, but it
seems
like this is not considered a high priority feature. I've not only
looked but actually used SGE for about 1 year (IIRC, about 5 years
ago)
during which I had to spend time fixing the interactions with LAM/MPI
and many of the parallel applications that were used on that
cluster -
and finally gave up. On the plus side, during the time that SGE was
used, I have never seen a process left behind from a job and the
queueing system itself seemed very stable - something that I could
not
say for the OpenPBS/Torque that I've also tested at that time.
You need to take a fresh look at SGE and Open MPI. Open MPI seems
to be
the new de facto standard MPI library, and you can compile it to be
fully integrated with both SGE and Torque. I just set up a cluster
using
SGE and Open MPI (built with the --with-sge option), and I there's no
need to tinker with the SGE's MPI startup wrapper scripts like in the
past. Everything just works: SGE and OpenMPI communicate directly with
each other, and SGE has complete control over ALL the MPI processes.
Attention: in 1.3 correct accounting is broken with this switch, as
the oted will daemonize. It will only be fixed in 1.3.2 AFAIK.
-- Reuti
A couple of years ago I did setup SGE with MPICH, and had to tinker
with
SGE's startup scripts to get everything to work correctly. Not that
difficult.
I could be wrong but I think at that time, to use Torque you needed to
compile a separate mpiexec program developed by a 3rd party to get
"tight integration" between MPI and Torque.
--
Prentice
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