Does multicore computing using R's doParallel package use more memory?

Question

I just tested an elastic net with and without a parallel backend. The call is:

enetGrid <- data.frame(.lambda=0,.fraction=c(.005))
ctrl <- trainControl( m         


        

Answer 1

There is a minimum number of characters elsewise I would simply have typed: 1) Yes. 2) No, er, maybe. There are packages that use a "shared memory" model for parallel computation, but R's more thoroughly tested packages don't use it.

http://www.stat.berkeley.edu/scf/paciorek-parallelWorkshop.pdf

http://heather.cs.ucdavis.edu/~matloff/158/PLN/ParProcBook.pdf

http://heather.cs.ucdavis.edu/Rdsm/BARUGSlides.pdf