What are the Uncertainties

Here we discovered some uncertainties facing GRID computing:

• Technical Challenges?

The major challenges are, concerning security(authentication, authorization etc.),resource allocation, scheduling, access of remote data sets, policy management, fault-tolerance, failure recovery, site autonomy, QoS (Quality of Service). Additionally, the Grid must meet stringent, dynamically changing performance requirements and be far more dependable than current peer-to-peer networks.

One of the problems with any computing technology is getting the different components to talk to each other. Nowhere is this more critical than when trying to get different platforms and environments to talk to each other. This is one of the challenges facing Grid computing. Building a seamless worldwide infrastructure requires global consensus on grid protocols. the basic mechanisms by which users negotiate, establish, and exploit shared access to resources. The lack of standards has meant that a whole host of companies, developers, and organizations have been developing and supporting the technology using different techniques and solutions. In the relatively isolated worlds of each Grid computing group, this hasn't caused a huge number of issues. But in the wider world of extending the Grid computing environment, it has created divisions, disagreements, and limitations.

• Economic Growth?

• Substitution Techonolgy?

GRID can be seen as the latest and most complete evolution of more familiar developments, such as: distributed computing, the Web/internet, clustering, peer-to-peer and virtualization technologies. Ironically, they, combined, can be used as substitutional technology for Grid as well.
For more detailed information, please refer to Basic Concepts under the topics of:

1. What other technologies are needed to help its development? the relationship between them?
   
2. Grid Computing Vs

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