On 08/09/07, Ashley Dowling <ashley.dowl...@gmail.com> wrote: > > > Hi all > > I am very much a novice at all this so please forgive my ignorance. I am > trying to set up a piece of analytical software for parallel processing of > my datasets on two quad core Mac Pros. I have managed to install OpenMPI on > the Macs, compile the software, and get it to run in parallel across the > four nodes within each Mac. My sticking point now is how to get it to run on > all eight nodes (two Macs) in parallel. The instructions on the webpage for > the software use Lam and are as follows: > > Running MrBayes > > First we have to start the 'lam' by creating a text file called lamhost. If > you are using one quad G5 machine, you need only one line "localhost cpu=4", > e.g. by typing in the terminal window > echo "localhost cpu=4" > lamhosts > > > When you have multiple machines, you need a line for every machine in the > lamhost file and the full machine name instead of localhost. The file might > look like > $ cat lamhosts > mac01 cpu=4 > mac02 cpu=4 > mac03 cpu=4 > > > To start the lam you can type > lamboot lamhosts > > > from a terminal window. > > To run mrbayes on N processors, you use > mpirun -np N ./mb > > > N is typically four times the number of machines you are using. > > To stop the lam type > wipe lamhosts > > > in a terminal window. > > Retrieved from " > http://mrbayes.csit.fsu.edu/wiki/index.php/FAQ_3.2"; > > > > Obviously this doesn't work on MPI since there is no lamboot. Is there an > equivalent command to use? Or better yet, how do I go about getting these > two machines to communicate in parallel? I have scoured the web looking for > advice on this, but as I mentioned, I am new at this and I think some of the > things I have found are just way over my head right now and have hit the > point where I am giving up and asking for help. Any info/instructions/advice > (written in terms I can understand) would be greatly appreciated.
Ashley, Did you try the OpenMPI web page? (http://www.openmpi.org). There's lots of info there, and help for running MPI jobs can be found in the FAQ: http://www.open-mpi.org/faq/?category=running HTH Paul
