[R-SIG-Mac] R and multicore architectures?
sdavis2 at mail.nih.gov
Thu Oct 11 13:53:25 CEST 2007
Nüzhet Dalfes wrote:
> We are gradually moving most of climate data and model output analyses
> to R. We have a 2 x Core 2 Duo Mac with 9GB memory and 3TB disk space,
> i.e. ideal for such work...
> Question: Does the standard (binary distribution) of R use all of the
> cores and access all of the available memory?
> Or does one have to recompile R to take advantages of more powerful
> hardware available around?
R will use the available memory, but keep in mind that MacOS is still a
32-bit operating system, so 9 Gb of RAM won't be used, I don't think. R
will use only one processor unless you write code specifically using
mechanisms like Rmpi OR if you simply run multiple R processes
simultaneously. Recompiling will not change that.
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