I am not able to check if NFS export/mount of /tmp is working, when i give the command *ssh 192.168.45.65 192.168.67.18* i get the error : bash: 192.168.67.18: command not found
let me explain what i understood using an example. First, i make a folder '/work directory' on my master node. Then i mount this directory on a folder named '/work directory/mnt' on the slave node is this correct? also how and where (is it on the master node) do i give the list of hosts? and by hosts you mean the compute nodes. Plez bear with me as this is the first time i am doin a project on Linux clustering. On Mon, Apr 6, 2009 at 9:27 PM, Gus Correa <g...@ldeo.columbia.edu> wrote: > Hi Ankush > > If I remember right, > mpirun will put you on your home directory, not on /tmp, > when it starts your ssh session. > To run on /tmp (or on /mnt/nfs) > you may need to use "-path" option. > > Likewise, you may want to give mpirun a list of hosts (-host option) > or a hostfile (-hostfile option), to specify where you want the > program to run. > > Do > "/full/path/to/openmpi/mpriun -help" > for details. > > Make sure your NFS export/mount of /tmp is working, > say, by doing: > > ssh slave_node 'hostname; ls /tmp; ls /mnt/nfs' > > or similar, and see if your program "pi" is really there (and where). > > Actually, it may be confusing to export /tmp, as it is part > of the basic Linux directory tree, > which is the reason why you mounted it on /mnt/nfs. > You may want to choose to export/mount > a directory that is not so generic as /tmp, > so that you can use a consistent name on both computers. > For instance, you can create a /my_export or /work directory > (or whatever name you prefer) on the master node, > export it to the slave node, mount it on the slave node > with the same name/mountpoint, and use it for your MPI work. > > I hope this helps. > Gus Correa > --------------------------------------------------------------------- > Gustavo Correa > Lamont-Doherty Earth Observatory - Columbia University > Palisades, NY, 10964-8000 - USA > --------------------------------------------------------------------- > > Ankush Kaul wrote: > >> Thank you sir, >> one more thing i am confused about, suppose i have 2 run a 'pi' program >> using open mpi, where do i place the program? >> >> currently i have placed it in /tmp folder on de master node. this /tmp >> folder is mounted on /mnt/nfs of the compute node. >> >> i run de progam from the tmp folder on de master node, is this correct? >> >> i m a newbie n really need some help, thanks in advance >> >> On Mon, Apr 6, 2009 at 8:43 PM, John Hearns <hear...@googlemail.com<mailto: >> hear...@googlemail.com>> wrote: >> >> 2009/4/6 Ankush Kaul <ankush.rk...@gmail.com >> <mailto:ankush.rk...@gmail.com>>: >> >> Also how do i come to know that the program is using resources >> of both the >> > nodes? >> >> Log into the second node before you start the program. >> Run 'top' >> Seriously - top is a very, very useful utility. >> _______________________________________________ >> users mailing list >> us...@open-mpi.org <mailto: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 >> > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
