Rmpi on a multiple-cpu pc under linux system

RMPI: An R package that can execute message passing interface, which allows parellel computaion in R enviroment. On an multiple cpu computer such as Dell insprion 530, on can run RMPI for parellel compution. Suppose Rmpi has been installed completely in R following the instruction (rmpi README file). Open a Terminal, type greenlinux4r@greenlinux4r-desktop:~$ lamclean greenlinux4r@greenlinux4r-desktop:~$ lamboot -v LAM 7.1.2/MPI 2 C++/ROMIO - Indiana University n-1<6366> ssi:boot:base:linear: booting n0 (localhost) n-1<6366> ssi:boot:base:linear: finished greenlinux4r@greenlinux4r-desktop:~$ mpiexec -n 4 R --no-save -q master (rank 0, comm 1) of size 4 is running on: greenlinux4r-desktop slave1 (rank 1, comm 1) of size 4 is running on: greenlinux4r-desktop slave2 (rank 2, comm 1) of size 4 is running on: greenlinux4r-desktop slave3 (rank 3, comm 1) of size 4 is running on: greenlinux4r-desktop One master and three co-working CPUs have been activated for use. Now, run R code to let the co-working CPUS to identify themselves. mpi.remote.exec(paste("I am",mpi.comm.rank(),"of",mpi.comm.size())) $slave1 [1] "I am 1 of 4" $slave2 [1] "I am 2 of 4" $slave3 [1] "I am 3 of 4" All co-working CPUS can be closed and Rmpi can be exited using > mpi.close.Rslaves() [1] 1 > mpi.quit([saving=yes/no]) type in yes to save workplace, otherwise no.