Thanks Geoff that makes sense now.  Similar to the Microsoft model where a
web server call COM objects on an application server that call a database
server.  Would it be possible to have the Web server calling Cold Fusion web
services on the application server.

Brian

-----Original Message-----
From: Geoff Bowers [mailto:[EMAIL PROTECTED]
Sent: Wednesday, 10 December 2003 10:16 AM
To: CFAussie Mailing List
Subject: [cfaussie] Re: 3 Tier application


Knott, Brian wrote:
> So you are still have CF code on the Web Server, it is just executed by
the
> application server.

Well yes and no.

The CF code is on the app server and executed on the app server.  Your 
effectively tricking the webserver into passing the .cfm/.cfc request 
off to another server for processing.  The other server has to have the 
exact same directory set up as the webserver so that it can look up the 
relevant code.

In practice this means that replicating the directory structure and code 
base onto the webserver is probably the easiest thing -- ie the web 
server and app server mirror each other for directories and files.

Just to add even more fun to the mix if you're going for such an 
implementation then to have redundancy you really need to load balance 
the app servers at the back-end.  Here is another article that's bound 
to add a few grey hairs :)
http://www.macromedia.com/devnet/mx/coldfusion/j2ee/articles/balancing_j2ee.
html

-- geoff
http://www.daemon.com.au/


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