Dorrego, Argentina

Webfarms II: Balancing The Load.

Okay, so you understand webfarms now. What's the magic that actually distributes the load, and how does it determine how the distribution is handled?

At ORCS Web we use the Foundry Server Iron products to perform our webfarm load-balancing. If one of them fails, the other instantly takes over (In our testing, it had sub-second fail-over!)

So what is this "Server Iron" thing? In simplest terms, it's a layer 4-7 switch. It has multiple network ports on it and can be used literally like other types of switches. But, it can also load-balancing and traffic distribution. A VIP (virtual IP) can be assigned to the SI (Server Iron) and it then handles all traffic sent to that address/VIP. Further configuration is done to tell the SI what to actually do with the traffic sent to the VIP address.

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What's in a Name?

A name can make of break a web site. I am of course talking about a Domain name.
You may think there is nothing to it. Pick a catchy domain name that rolls off the tongue, check that it is available and if it is go ahead and buy it. It couldn't be any harder that that can it?
Well, yes it can. Just stop and think for a minute. You have bought the domain name, designed and built a great looking website, and launched it out onto that great world wide web. You have got a great Reciprocal Link Exchange on your site and you have reached a reasonable Google Page Rank.
Then you decide to get an Auto responder to have a mailing list, and that is when your troubles start! Let me tell you my story...

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