Introduction
In Grid systems, the Quality of Service (QoS) is not limited to the network bandwidth, but extends to the processing and storage capabilities of the nodes. Thus the focus is on the degree a Grid can provide end-to-end QOS rather than providing only QOS on the network. When a Grid job has QOS requirements, it may be necessary to negotiate a service level agreement (SLA) to enforce the desired level of service. Resource reservation is one of the ways of providing guaranteed QOS in a Grid with dedicated resources. One of the major issues in resource reservation is correct matching of available resources with required resources, this results effectively utilize various resources in the system, such as CPU cycle, memory, communication network, and data storage. Correct matching operation depends on percept job resource requirements. This can be obtained by two methods. In the first method, environment can ask resource requirements from user. This is not proper in QOS. Another method is that architecture itself predicts resource requirement. job resource requirements prediction algorithms operate on the principle that jobs with similar characteristics have similar resource requirements.
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