inst/examples/test_long_vector/bcast.r

In pbdMPI: R Interface to MPI for HPC Clusters (Programming with Big Data Project)

### SHELL> mpiexec -np 2 Rscript --vanilla [...].r

suppressMessages(library(pbdMPI, quietly = TRUE))
.comm.size <- comm.size()
.comm.rank <- comm.rank()

N <- 1024
x <- (1:N) + N * .comm.rank
comm.print(x[N - (1:5)], rank.print = 1)

y <- bcast(matrix(x, nrow = 1))
comm.print(y[N - (1:5)], rank.print = 1)
y <- bcast(as.integer(x))
comm.print(y[N - (1:5)], rank.print = 1)
y <- bcast(as.double(x))
comm.print(y[N - (1:5)], rank.print = 1)

finalize()