[mpich-discuss] machinefile question and select hydra as primary pm

[mark]

Hello,
i did a fresh install of 3.0.4. on a linux laptop and since i dont have 
much experience i followed the installation readme on the tar file and 
everything went well expect the part when i test the installation. The 
first test run : mpiexec -n <number> ./examples/cpi , went as planned 
but then the second test run on multiple nodes (mpiexec -f machinefile 
-n <number> ./examples/cpi) returned some errors. As the readme states 
there should be a machinefile. The thing is i cant find this file and 
tried to create it my self in the given form, just using only my laptops 
hostname a couple of times and placing it in the mpich installation 
directory ( /home/<username>/mpich-install) and that didnt fix the errors.

One other thing i noticed is that on the readme states that hydra is the 
primary process manager, but using the mpiexec -info it clearly states 
that pmi ( or something similar ) is the primary pm.

And for a last thing my installation was made without using any prefixes 
at the configuration.

PS.One other thing i just noticed is that when i did the installation i 
could run mpich ( the test runs with the pi programm, mpiexec -info , 
etc) , but now after a reboot i cant run mpich on the terminal. For 
example *mpiexec -info* returns *_bash: mpiexec: command not found_* . 
Whats the deal with that? Didnt i installed mpich on my machine?

Thank you for your time.
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