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Date:      Thu, 11 May 2000 15:17:44 -0400
From:      Nathan Vidican <webmaster@wmptl.com>
To:        Brennan W Stehling <brennan@offwhite.net>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Clustering FreeBSD
Message-ID:  <391B0758.5F0D758C@wmptl.com>
References:  <Pine.BSF.4.10.10005111327300.98375-100000@home.offwhite.net>

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There are many different ways you can approach this. I'll give you my
two suggestions, but I'd be curious as to what you do end up using? 
	First off- (this is something we actually implement) you could use a
managed hub to  setup resilient port pools, wherein two identical
mirrored machines (both assuming the same IP address) are connected to
say port one, and port 12 of the hub; when the hub detects a loss of
link, or a poor link status (user defined 'poor'), it disconnects one
machine and connects the other. We're utilizing this concept on our
radius boxes, because it allows us to reboot them daily without any
interuption in service (one at noon, one at midnight kinda deal).
	Secondly, you could use some sort of caching system (ie squid), to
accelerate your httpd server(s) through the user of cache-pools.
Although descriptively shorter, this method is much more difficult to
implement.
	Anyhow, I think you under-estimate the capabilities of a one-machine
webserver; Yahoo has posted reports of being able to handle upwards of
12,000,000 requests to a single pentium box, (single cpu/nothing
extravagent). Well, that's my two cents, drop me a line once you've
reached a buck will you?


-- 
Nathan Vidican
webmaster@wmptl.com
Windsor Match Plate & Tool Ltd.
http://www.wmptl.com/

Brennan W Stehling wrote:
> 
> News site http://daily.daemonnews.org/ is pointing to a Yahoo! article
> about a clustering system which is being bundled with FreeBSD 4.0 now.
> The link is below.
> 
> How well does clustering work?  Is it very hard to set up?  How does the
> failover work when I have multiple machines?  Do they somehow share an IP?
> 
> The reason I am concerned is that I manage a website which will be getting
> much more traffic now that we have a large advertising budget.  As the
> site gets much more traffic I am thinking a single FreeBSD box may not
> cut it and I would have to do either a dual pentium or round-robin dns
> much like sites like cnn.com do now.
> 
> What other options do I have besides clustering?  How about channeling
> services through a single server with NAT to route to dns, web and mail
> traffic which I can dynamically route as needed?  Just a little over my
> head.
> 
> Anyone have any experience here?  Any insights?
> 
> http://biz.yahoo.com/bw/000501/ca_polyser_1.html
> 
> Brennan Stehling - web developer and sys admin
> projects: www.greasydaemon.com | www.onmilwaukee.com | www.sncalumni.com
> 
> Microsoft: Will you get a macro virus today?
> 
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