[R] cgi/servlets/httpd in R

[David Firth]

On Thursday, May 6, 2004, at 16:01 Europe/London, Samuelson, Frank* 
wrote:

> Here's a related question:  Do any of the mentioned R-web interfaces
> (Rweb, R-Online, CGIwithR, RSPerl) support reusing the same R process,
> eliminating the startup overhead?  This would be useful to me as well.
>
> 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.
>
>

I only know about CGIwithR, which is very simple and starts a new R for 
every request.  Startup time on my Mac is around 1.3 seconds; for my 
own purposes this is absolutely fine, but I can appreciate that it 
could well be problematic in certain kinds of application (eg where a 
very large amount of data has to be loaded).

Best wishes,
David