This was my point. Using RSPerl with ordinary CGI of course starts a new process for each request. But using fastcgi uses the same perl process for new requests. So, if you can use fastcgi in conjunction with RSPerl (which i did not try), there would be no startup overhead anymore.
Christian
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.
Thanks for any tips.
-Frank
-----Original Message-----
From: Christian Lederer [mailto:[EMAIL PROTECTED] Sent: Thursday, May 06, 2004 10:04 AM
To: [EMAIL PROTECTED]
Subject: Re: [R] cgi/servlets/httpd in R
Hi,
if found that the easiest way for me doing CGI with R was using the RSPerl package. So i could do all the CGI related things in Perl and call R functions from Perl to do the statistics. You can get RSPerl from http://www.omegahat.org.
If loading the data each time gives a performance problem, i guess that you could use RSPerl together with fastcgi, so the R initialization and loading the data would happen only once. If you try this, i would be very interrested in your experiences.
The RSPerl package is somewhat outdated, but it worked well together with R 1.6.0 (i didn't try newer versions).
Christian :-)
David Firth wrote:
On Wednesday, May 5, 2004, at 18:09 Europe/London, foobar wrote:
Hi R-helpers
Has anyone had any experience doing CGI or Servlets or using an httpd server in R?
yes. See the R FAQ, section 4. (Or maybe you already have, in which case I misunderstood the question...)
Best wishes, David
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