Currently I use such a method on my computing cluster: All 40 compute nodes run an R process/compute server that listens at a socket for
any connection and subsequent commands from another computer. When the master process disconnects, the R processes go back to listening
at the socket. Connecting to the R compute servers this way
takes < 2 milliseconds rather than the typical ~2 second R startup time.
Your solution seems what I am looking for, actually. Questions:
1. How do you communicate with an R process? I can only think of embedded code like SQL in Perl.
2. How do you find an R node that is open?
2.5 You are haveing cgi scripts connect to the R processes, right? Or are the R processes available for another purpose?
3. How much of your code are you willing to share :)? We are interested in making demographic analysis tools available online (life-table-ish stuff to start with, then as much as we can get grant money for).
W
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