[R] Snow Parallel R: makeCluster with more nodes than available

Uwe Ligges ligges at statistik.tu-dortmund.de
Fri Mar 27 13:19:45 CET 2009

Ubuntu Diego wrote:
> Hi all,
> 	I would like to know what would happen if using snow I create a cluster
> of size 50, for example using makeCluster(50,type='SOCK') on a machine
> with 2 Cores and run a function. Does snow run 25 and 25 functions on
> each of my 2 "real" processors or it just run 50 functions in one
> processor ?

It will run the 50 in parallel and is not advisable to do so on a 
machine with 3 cores - a slow down due to "administrative" overhead is 

Uwe Ligges

> Thanks.
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