[R] cgi/servlets/httpd in R

[Christian Lederer]

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:christian.lederer at imse.med.tu-muenchen.de] 
> Sent: Thursday, May 06, 2004 10:04 AM
> To: r-help at stat.math.ethz.ch
> 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 The RSPerl package is somewhat outdated, but it worked well together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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>>
> 
> 
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