[Rd] R and ATLAS and distributing across boxes

Adam D. I. Kramer adik-rdevel at ilovebacon.org
Wed Mar 9 23:34:23 CET 2011


 	If I have a cluster of heterogenous machines, each with their own
self-optimized ATLAS, do I need to compile R on each machine to tell it to
take advantage of the local ATLAS? Or is it sufficient to compile R once
with the appropriate --with-blas and --with-lapack flags, and then trust
that, once installed on a certain box, R will look in the right place and
find and use the local library? Or will I need to recompile R on each box?

 	Googling around has shown me how to have R use ATLAS instead of
native BLAS, but none of them note whether changing the BLAS library out
from under an R binary will change the code that R executes.

Thanks in advance,
Adam D. I. Kramer

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