[R] R: Securities earning covariance

[ANGELO.LINARDI at bancaditalia.it]

Good morning.

I have a real fuzzy question to ask; we have a calculation engine which
is composed by n virtual machines each of them with a jvm 2GB of memory
on Linux Red Hat each of them with the "R" package which comes along
with the Red Hat Linux distribution.
We have now to increase the number of "nodes" trying to avoid to use new
virtual or physical machines. So my question is: is it possible to
install multiple jvm on the same machine each of them with its
independent instance of R ?
Should I "duplicate" the initial R installation to get different
instances with different libraries ? Is it enough or even in this case
the different instances "share" something so they are not really "fully
independent" ? 
Thanks so much for you help

Angelo Linardi

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