Am 26.08.2013 um 14:33 schrieb Federico Carotenuto: > 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.
This was normal at that time: one rsh/ssh per parallel instance. Nowadays Open MPI and MPICH2/3 will use only one `rsh`/`ssh` per host and start all other parallel tasks as thread (i.e: on a local machine they don't need a local `rsh` or `ssh` at all). Although you could either adjust `rsh` to disregard passwords (deprecated) or route `rsh` to `ssh` and enable passphraseless login: MPICH(1) is outdated (released 2005) and I suggested already to Portland to exclude it from the package. IMO this adds more confusion than it help. Hence, please install a recent version of Open MPI or MPICH2/3 and then we can look into it again on the appropriate list. -- Reuti PS: The above mentioned LAM/MPI is outdated too. > 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 >>>> _______________________________________________ >>>> users mailing list >>>> us...@open-mpi.org >>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>>> >>> >>> >>> >>> ---------------------------------------------------------------- >>> This message was sent using IMP, the Internet Messaging Program. >>> >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/users >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users >> > > > > ---------------------------------------------------------------- > This message was sent using IMP, the Internet Messaging Program. > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
