RE: [users@httpd] lots of near-simultaneous requests the same file

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> -----Original Message-----
> From: Chase [mailto:xanadu@xxxxxxxx]
> Sent: Freitag, 29. Juli 2005 00:43
> To: users@xxxxxxxxxxxxxxxx
> Subject: [users@httpd] lots of near-simultaneous requests the 
> same file
> 
> 
> i have a tiny little cgi script (one line of code) that will be  
> called at least once a minute by at least 1000 users of a piece of  
> software that i'm developing.
> 
> the user can, if they want, set the refresh time to up to an hour,  
> but let's consider the worst-case scenario for the purpose of this  
> question.
> 
> is there any benefit to creating multiple, identical copies of the  
> same cgi script and have the software randomly select which one it  
> will fetch?

I don't think so. Apache just reads the file into memory and then drops the filehandle - it doesn't keep it open while it's executing. Your worst case is not 1000 users trying a simultaneous read, it's 30 or 40 apache daemons reading simultaneously and that shouldn't be a problem. You might be better looking at mod_perl which allows you to keep the program resident in memory and so it doesn't get reloaded for every request - or try caching the output so you don't need to keep re-executing it.

Rgds,
Owen Boyle
Disclaimer: Any disclaimer attached to this message may be ignored. 

> 
> something like:
> 
>      /cgi-bin/myscript01.cgi
>      /cgi-bin/myscript02.cgi
>      /cgi-bin/myscript03.cgi
>      /cgi-bin/myscript04.cgi
>      /cgi-bin/myscript05.cgi
>      /cgi-bin/myscript06.cgi
>      /cgi-bin/myscript07.cgi
>      /cgi-bin/myscript08.cgi
>      /cgi-bin/myscript09.cgi
>      /cgi-bin/myscript10.cgi
> 
> 
> i see this sort of thing from time time on the internet, but i've  
> never heard anyone explain why someone might do this.  i always just  
> assumed that the implication is that a single file maybe has some  
> limitation on the number of times it can be simultaneously opened.
> 
> i don't mind setting it up like this, but it would of course be  
> simpler to leave it as a single script.
> 
> can someone elaborate on this subject please?
> 
> thanks.
> 
> - chase
> 
> 
> 
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