If one wonders why the grid is not widely used, the answer is trivial - A p p l i c a t i o n s!
Obvious - not ?
Well not so obvious. There are many other issues that cause the application to be not present.
First is the parallel thinking, most of us think serial, or at least not really parallel. It causes both, the application development and the user understanding more complicated. So it should be covered with a lot of abstraction layers that will give good feelig for the user.
Developers, QA, trainers, etc. need to change the way they think. It is not easy to make this major change mainly since there is no methodologies and best practices. The lack of tools can be seen as great opportunity. There is much knowledge in this area, but it is concentrated within the universities and research institutes. Those organizaitons do not understand the industry needs nor the business models.
What about the need?
It is clear that more compute power can be used and contribute to any company, on the other side it is not clear what is the marginal contrubution. The right question qould be not what we gain from doing it but rather what we loose if we do not do it. That is the exact problem of the grid applications. There are many killer apps, but none of them was found yet....
Developing the business model for grid application will probably make a difference. In the past, search engines did not had a common incoming model. Then came Google and the rest is history. SaaS, cloud, etc. are nice ideas, but they are not the business model that you will crash on.
We wait very much for the Google of the Grid world.
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