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Rack em – Stack em – Pack em!

This industry has a talent for taking a simple concept and smothering it with technical detail. I’ve keeping an eye on the blade debate, which is all about the arrival of modular Servers and have decided that it’s becoming a little fuzzy as we try and identify the dividing line between a Server on a card, ‘a Blade’ and a Server on a card’, a Brick.

First of all, we need to understand that Blades and Bricks aren’t mutually exclusive and that a Blade is only one component of a larger, high-density Server unit, rather like the half-human occupants of a Borg cube in a Star Trek movie. With IBM’s latest offering, based on Intel’s Xeon processor, we’re now up to a possible 84 Blades crammed on to a single rack but rather than clearing-out banks of older Servers at a single sweep, the arrival of this tightly stacked blade technology in the Server room represents an evolution rather than a replacement for more traditional Big Iron computing and I would expect to see the two coexist quite happily.

Blades represent a great clustering solution through offering many Servers in a single unit but Bricks, by adding more components to each Blade, - a chunkier Blade if you like -, represents a more interchangeable, scalable solution, which is more appropriate for resource sharing.

It’s not difficult to understand why Blades are going to be a hot topic for some time to come. This is after all a much cheaper way of adding processing capacity without the extra Datacentre costs of space and power. Sitting in the middle of an IT recession, businesses are increasingly cost and productivity conscious and Gartner predicts that the market will grow to $3.7 Billion by 2006.

But any new technology solution carries it’s own health warning and Blades or even Bricks aren’t immune. Standards and compatibility issues still need to be resolved and it’s still early days for management software and it’s argued that Blades aren’t really well-suited to Enterprise applications, although with IBM and indeed Sun Microsystems now playing in this space, I would expect many of today’s problems and objections to have been resolved by mid-2003.

So the Bricks over Blades argument that has recently popped-up is a little specious as both terms really appear to represent one and the same thing, high-end modular computing, not really very different, in principle to slotting multi-function cards into the back of one’s PC, some being more functional and thicker than others.

Moving forward eighteen months and large companies will increasingly start to consider the nature of the Server solution they require. Big Iron, the kind of expression one associates with Unisys and its very successful ES7000 or Server Blades – or Bricks – from IBM or Hewlett Packard or Sun perhaps. Of course, the final decision will be determined by the environment or the application, a solution best suited to one or the other, clustered or Enterprise perhaps?

Move forward to 2006 and I suspect we’ll simply take the choice for granted, choosing the right Server for the task in much the same way as we might choose a family car.


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