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I have web hosts at 3 different locations. I want to create a fail-safe for the websites, so if one host is down, the web sites are still available.

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Let's pretend there's a direct question involved in your post rather than an inferred one.

What you're looking for is some form of "global load balancing", usually gained via either DNS configuration (i.e. site-by-site round-robin or load-probing) or via hardware GSS products (Clicky for link).

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Well if you want to put it technically, yes that is what I want to do, without extra hardware or overheads, can I do it? –  Jean Jan 21 '10 at 9:36
    
Yes, "usually gained via either DNS configuration (i.e. site-by-site round-robin or load-probing)" - this requires no extra hardware. –  Chopper3 Jan 21 '10 at 9:40
    
So, How do I go about do this? –  Jean Jan 21 '10 at 9:47
    
dunno if this will help? - tinyurl.com/yc3ar36 another solution is to get a cheap vps and run LVS on it - point all DNS at it, configured correctly it can tell if one of the servers in the cluster is down and stop sending it requests. –  Matt Didcoe Jan 21 '10 at 12:01
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If this is a website that generates income (or for a business with income) you could try placing the burden on a site that is globally located and redundant already, like the Amazon cloud. They can spin up new virtual servers to handle more load when necessary.

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