If you haven't used MPI before, I would break this up into chunks: 1. Write a MPI program that gathers a fixed amount of /dev/urandom (Brian's suggestion is wise) data and sends it back to the master. This will get you used to the basic MPI_Send/MPI_Recv commands.
2. Use the same program, but use MPI_Gather rather than MPI_Recv to assemble the final array. That will get you used to collective communication. 3. Find a parallel sorting algorithm and implement it. You'll still need to have rank 0 do some work, but the point of the algorithm would be to reduce the amount of work it has to do. I found a good description of parallel merge sort here: http://penguin.ewu.edu/~trolfe/ParallelMerge/ParallelMerge.html Good luck! Skylar On 10/07/2016 10:19 AM, Darren Wise wrote: > Heya folks, > > This may seem really simple to some and it is fairly simple from the > terminal using bash of generation and sorting (examples below) > > What I would like to do, to get started with making a program to run in > MPI on my cluster.. I thought of a fairly simple bash script and this > works fine for a single machine but what is the best way to go around it > or converting this simple notion in to an MPI runable command. > > Generates random strings of chars: > $ tr -cd '[upper:]' < /dev/random | fold -w9 | head -c${1:-1000} | tee > somefile.txt > > Removes duplicate lines: > $ sort filename.txt | uniq > > This is fine for generation as I mention for a single machine, but > what's the best way to turn this around and use MPI with a shared NFS > mounted filesystem.. > > While this is an example im going to generate a bash script to allow me > to generate every possible permutation of a desired string length along > with types of chars a-z, A-Z, 0-9 along with symbols.. > > So any advice is welcome really and it's just an educational way for me > to transpire into generating code that can be used within my small beowulf. > >> Kind regards, >> Darren Wise Esq. >> >> www.wisecorp.co.uk <http://www.wisecorp.co.uk> >> www.wisecorp.co.uk/babywise <http://www.wisecorp.co.uk/babywise> >> www.darrenwise.co.uk <http://www.darrenwise.co.uk> > > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
