Parallel Processing in R in caret

Question

It is given in the caret documentation that to allow parallel processing the following code works

library(doMC) 
registerDoMC(cores = 5) 
## All subsequent mode         


        

Answer 1

Just to expand on the implementation of the previous answers and basically using the Caret package documentation, here is a recipe that works for me:

set.seed(112233)
library(parallel) 
# Calculate the number of cores
no_cores <- detectCores() - 1

library(doParallel)
# create the cluster for caret to use
cl <- makePSOCKcluster(no_cores)
registerDoParallel(cl)

# do your regular caret train calculation enabling
# allowParallel = TRUE for the functions that do
# use it as part of their implementation. This is
# determined by the caret package.

stopCluster(cl)
registerDoSEQ()