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

[Reuti]

Hi,

Am 24.10.2013 um 14:07 schrieb mark:

> Στις 24/10/2013 02:47 μμ, ο/η Reuti έγραψε:
>> Hi,
>> 
>> Am 24.10.2013 um 10:07 schrieb mark:
>> 
>> 
>>> 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 
>>> 
>> 
>> You mean a plain `./configure && make && make install`, hence installed at the standard location as root?

So you used --prefix=... - fine.


>> Well i mean that actually , but as non-root. And in the user folder as in /home/<username>/mpich-install .
>>> 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.
>>> 
>> 
>> Is MPICH 3.0.4 also available on both machines?
>> 
>> 
>> 
> For now i have only this machine.Single laptop and i would like to run some mpi programs. Maybe in this case , perhaps is the machinefile useless??

In case you have only one machine you don't need it necessarily.


>>> 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.
>>> 
>> http://wiki.mpich.org/mpich/index.php/Frequently_Asked_Questions#Q:_What_are_process_managers.3F
>> 
>> 
>> 
>> Maybe it should better read: "Process Manager uses: pmi", and as the default is to compile Hydra, you know it already (there are different `mpiexec`s for the different process managers and e.g. mpiexec.gforker has no "-info" option).
>> 
>> 
>> 
> So the primary processor manager (default) in my installation is hydra right?
>>> 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?
>>> 
>> Might be a $PATH problem, in case it wasn't installed at the default location.
> I thought of that too, and i checked it but unsuccessfully. Maybe it has to do with the fact that i didn't installed it as root.Maybe i need to redo the installation as root? Any suggestions? As to the install location etc ?

You need to add something to your $PATH only:

$ export PATH=$HOME/mpich-install/bin:$PATH

and try again.

-- Reuti