Volunteer computing which benefit from idle cycles of desktop PCs over the Internet can integrate power of hundreds to thousands desktop systems to achieve high computing power. Centralized volunteer computing system has dedicated servers to maintain information about the resources. However, in the decentralized system resource information is distributed in the system. Resource discovery architecture is a key factor for peer-to-peer based volunteer computing system. Usually, there is a complex relationship between the distribution of resource information and performance of a system. The main contribution of this paper is to develop a proximity-aware resource discovery architecture for peer-topeer based volunteer computing system. This architecture has simplicity of a centralized system and can achieve close performance compared to this system, and it is scalable. Furthermore, proposed architecture distributes jobs among the resources fairly. Two resource discovery algorithm with and without proximity-aware feature are compared. The proximity-aware resource discovery algorithm can gain a better result

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