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<https://exchange.uky.edu/owa/redir.aspx?URL=http%3a%2f%2fmrbayes.csit.fsu.edu%2fwiki%2findex.php%2fFAQ_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. Thanks much Ashley
