thx, guys, almost there. This is good fodder for the vignette or ?parallel.
Steps:
(1) install package "snow" on all machines which you want to be part
of a cluster.
(2) run under R
library(parallel)
cl <- makeCluster(c("localhost", "calc.localdomain"), "SOCK")
result <- parLapply(cl=cl, X=1:100, function(x) {
paste(x,system("hostname", intern="TRUE")) } )
stopCluster(cl)
in my case, with two linux ubuntu machines and R 2.14...this hangs (!)
because I made a small mistake, using "TRUE" instead of TRUE. if I
fix it, it works fine. is there a way to have the slave signal "abort
the parLapply" job when it encounters an error? [or is it something
with my setup that prevents the abort? does it abort correctly on
your machines?]
(I run not R 2.15 but R 2.14.1 on ubuntu 12.04LTS beta, because in
/etc/apt/sources.list, deb http://cran.cnr.Berkeley.edu precise
multiverse still installs 2.14.1.)
regards,
/iaw
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