Due to the dynamic nature of the Grid computing and P2P in networks, the behavior of system might be very unpredictable in respect of reliability. Thus, we need well-organized system architecture to provide high system availability with resource scheduling scheme for P2P Grid application. In this paper, we propose the SLA-constrained resource scheduling policy methodology in order to enhance system performance in P2P Grid. The simulation results show that SCPA-based job scheduling can support the load balancing and guarantee the high system availability in system performance.
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