This is extremely tricky to do. How do you know which environment
variables to forward (foo in this case) and which not to (hostname).
SLURM has a better chance, since it's linux only and generally only run on
tightly controlled clusters. But there's a whole variety of things that
shouldn't be forwarded and that list differs from OS to OS.
I believe we toyed around with the "right thing" in LAM and early on with
OPen MPI and decided that it was too hard to meet expected behavior.
Brian
On Mon, 5 Nov 2007, Tim Prins wrote:
Hi,
After talking with Torsten today I found something weird. When using the SLURM
pls we seem to forward a user's environment, but when using the rsh pls we do
not.
I.e.:
[tprins@odin ~]$ mpirun -np 1 printenv |grep foo
[tprins@odin ~]$ export foo=bar
[tprins@odin ~]$ mpirun -np 1 printenv |grep foo
foo=bar
[tprins@odin ~]$ mpirun -np 1 -mca pls rsh printenv |grep foo
So my question is which is the expected behavior?
I don't think we can do anything about SLURM automatically forwarding the
environment, but I think there should be a way to make rsh forward the
environment. Perhaps add a flag to mpirun to do this?
Thanks,
Tim
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