I would agree with Dave, your better off going with a hardware based LB and
not even using clustercats. We for example run 2 seperate clusters, one set
of servers for pictures and one set for CFapps. Plus you can do error
trapping with most LBs' so that a 404 will get directed to another server.
There is much more expandability going hardware based and all the app
servers run the same load regardless.

Steve

----- Original Message -----
From: "Dave Watts" <[EMAIL PROTECTED]>
To: "CF-Server" <[EMAIL PROTECTED]>
Sent: Wednesday, February 06, 2002 9:38 AM
Subject: RE: Server Cluster Newbie Questions


> > 1.) do server clusters typically employ a special hardware
> > request dispatcher/router that manages traffic to the cluster?
>
> Hardware-based clustering solutions do. You can use software-based
> clustering (ClusterCATS + round-robin DNS), but in my (admittedly somewhat
> limited) experience, hardware-based solutions work better. There are
several
> vendors who provide hardware solutions for this, such as Cisco and
Foundry.
> One of the neat things about these solutions is that they can also act as
> SSL managers and accelerators, and can be configured so that they handle
SSL
> themselves, and use regular HTTP to talk to the individual server
clusters,
> so that you don't have to install the SSL cert on each box, and you
> generally get better performance - and if necessary, you can use "sticky"
> sessions in this way.
>
> > 2.) if the cluster is intended to distribute the cf
> > application processing load, but not the webserver load
> > for asset requests (like gifs and jpegs) - are there easy
> > ways to manage the difference by file type?  by folder?
>
> In most configurations I've seen, there's no differentiation between the
two
> - all assets are loaded on each server, and each request is load-balanced
> whether it's a CF request or a simple file request. However, you might
> configure servers for just these assets, and write your code to fetch
files
> from these servers instead of your CF application servers.
>
> Dave Watts, CTO, Fig Leaf Software
> http://www.figleaf.com/
> voice: (202) 797-5496
> fax: (202) 797-5444
> 
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