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In this paper, we propose and evaluate GrAMoS, a low-overhead WS-Agreement monitoring service that runs on Globus 4 and is integrated to JSS. To monitor resources and detect agreement violations, GrAMoS uses the stratified random sampling technique and proposes flexible agreement violation actions. The experimental results collected with a prototype of GrAMoS which monitored CPU reservation WS-Agreements show that the overhead incurred is lower than 2.8%, for grid tasks that take longer than 55s.

Abstract.A method to balance the communication among Multi-Agents in real time traffic synchronization is proposed in this research. The paper presents Air Traffic Flow Management (ATFM) problem and its synchronization property. For such a complex problem, combing grid computing with multi-agent coordination techniques to improve ATFM computational efficiency is the main objective of actual research. To demonstrate the developed model -ATFM in Grid Computing (ATFMGC), the grid architecture, the basic components and the relationship among them are described. At the same time, the function of agents (tactical planning agent etc.), their knowledge representation and inference processes are also discussed. As criteria to measure the effective to reduce quantity of the communication among agents and the delay of the flights, Standard of Balancing among Agents (SBA) is used in the analysis. The simulation shows the efficiency of the developed model and successful application in the case study.

In order to provide a better understanding on the semantics of the memory models, many researchers have proposed formalisms to define them. Unfortunately, many of the formal definitions are so complex that it is still difficult to say what kind of execution history can be produced on a particular memory consistency model. In this paper, we propose a visualization tool that shows what operations orderings could lead to user-defined execution histories on different memory consistency models. The memory consistency model defines order relations that restrict the executions that can be produced. We also present a prototype of this visualization tool that analyses two-processor execution histories for two memory consistency models: sequential consistency and PRAM consistency.