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From "Ignacio J. Ortega" <>
Subject RE: Anyone know why the ISAPI redirector works how it does?
Date Sun, 24 Jun 2001 00:34:32 GMT
Hola Andy:

> Thanks Ignacio; I understand what you're saying now. If all 
> the filters
> run in the same thread that implies that IIS handles all its 
> requests in
> a single thread, which seems unlikely, but of course I could be wrong.

What i'm trying to say is not that, is evident that IIS does not serve
all the request from the same thread .. only that every filter is called
in ALL the IIS request.. ergo if you start to block server threads in
tomcat requests you are pushing innecesarily the IIS server... at least
the thread pool that is used to serve requests..

> I'd be interested in anything you can find. I don't expect it 
> to involve
> too much work, so I'm going to build it and do some 
> performance testing
> to find out if there are any problems. From what you're saying the
> performance problem to look for would be lots of Tomcat 
> requests having
> an adverse affect on the performance for non-Tomcat IIS requests.

This is the bad behaviour the filter+Extension mix is trying to avoid..

> I'm putting it in a directory called 'isapi' and leaving 'iis' intact.
> In any case I have some more work to do on the existing IIS redirector
> to make it work properly with the latest jk code, but that's 
> a separate
> issue, and I won't do anything too scary to the current IIS code.

Thanks, this is was my -1 was intended for..

> -- 
> Andy Armstrong, Tagish

Saludos ,
Ignacio J. Ortega

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