Kind Reuti,
I'm start thinking I've got some compilation issue with MPI: I'm
afraid I've got the MPICH 1 coming with the PGI compiler installation,
because if I try to run mpiexec the terminal answers with "The program
'mpiexec' can be found in the following packages: *lam-runtime *mpich2
*openmpi-bin *openmpi1.6-bin. Try: sudo apt-get install <selected
package>".
I've also tried to modify the machinefile that comes by default under
/opt/pgi/linux86-64/13.4/mpi/mpich/share/machinefile.LINUX adding the
line "modelstation:8", but still mpirun prompts for the password 8
times.
Thanks for your help and patience
Reuti <re...@staff.uni-marburg.de> ha scritto:
Am 26.08.2013 um 12:53 schrieb Federico Carotenuto:
Kind Reuti,
Thanks for your quick reply!
I'm afraid I didn't set a machinefile...that may be the problem:
I'm fairly new to MPI and SSH and I'm still quite confused even
after reading some tutorials.
There is a default. But you can also specify it on the command line
to test it:
mpiexec -host modelstation -np 2 mpihello
-- Reuti
My etc/hosts contains: 127.0.0.1 localhost and 127.0.1.1
modelstation (modelstation is the machine name I was mentioning in
the previous mail)
if I type hostname the terminal returns modelstation
Cheers
Reuti <re...@staff.uni-marburg.de> ha scritto:
Am 26.08.2013 um 12:15 schrieb Federico Carotenuto:
I'm currently having this issue with mpirun: I want to launch a
program only on the cores of the local machine, but every time I
run an mpi program it says that the host 127.0.0.1
<local_machine_name> with it's associated key is unkown and asks
me if I want to add it to the list of ssh known hosts.
By chowing/chmodding the .ssh file I was able to permanently add
this "host" to the list of known hosts, but my problem is that
every program that I try to run ask me to insert a password (the
actual local user password) n times where n is equal to the -np
parameter (i.e.: if I run the program on 8 cores I receive 8
successive password pronts).
If I insert the password everything runs fine, but it's quite
annoying and I wish to bypass such step: is there a way to have
mpirun memorize the password? Or make him understand that the 8
nodes are actually 8 cores on the local machine and not 8
different hosts?
Which hostname do you specify in your machinefile?
Which hostnames are set in /etc/hosts for your local machine?
What is the output of `hostname`? Does it match the one in the machinefile?
For systemd there is a new command `hostnamectl --static
set-hostname [NAME]` to set it.
-- Reuti
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