On Tue, 18 Jan 2005, Liaw, Andy wrote:
From: bogdan romocea
It appears you wouldn't get much improvement at all even if the 2nd CPU were used at 100%. Five R sessions can easily overwhelm one CPU. I think you need (a lot) more CPUs than 2 to solve your problem.
Possible solutions: 1. Install R on each eMac. Since you have 40 of them, you might want to put together a script to do this. 2. Get some boxes that can run Windows. On Windows, you can run R from a CD/zip drive/USB drive. (So you could burn 40 CDs and have everyone run their R session on their box.) As far as I know the same is not true for GNU/Linux and Mac OS.
If one can run Linux off a (live) CD, why wouldn't it be possible to do the same for R? (Burn a Quantian DVD and you can boot a x86 box from it to run R.)
If I'm not mistaken, it shouldn't be a problem running R off a USB pen drive or CD under Linux. I can give it a shot tonight (if I can find the time).
There is. The script `R' used to run R contains the absolute path to the R_HOME_DIR, e.g.
R_HOME_DIR=/usr/local/lib/R
if test -n "${R_HOME}" && \
test "${R_HOME}" != "${R_HOME_DIR}"; then
echo "WARNING: ignoring environment value of R_HOME"
fi
R_HOME="${R_HOME_DIR}"
export R_HOMEand so you would have to mount a removable drive on the exact place it was written for. I am not sure that is possible with multiple USB ports.
I believe R's MacOS X port is written to be always in one place in the file system, and that is encoded by e.g.
RLAPACK_LDFLAGS="-install_name \$(Rexeclibdir)/libRlapack.dylib"
-- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595
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