Computer & Information Science |
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Virtual and Dynamic Hierarchical Architecture: an overlay network topology for discovering grid services with high performance |
HUANG Li-can, WU Zhao-hui, PAN Yun-he |
College of Computer Science, Zhejiang University, Hangzhou 310027, China; Ministry\'s intelligent virtual research center, Hangzhou 310027, China |
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Abstract This paper presents an overlay network topology called Virtual and Dynamic Hierarchical Architecture (VDHA) for discovering Grid services with high performance. Service discovery based on VDHA has scalable, autonomous, efficient, reliable and quick responsive. We propose two service discovery algorithms. Full Search Query and Discovery Protocol (FSQDP) discovers the nodes that match the request message from all N nodes, which has time complexity O(logN), space complexity O(nvg) (nvgbeing node numbers of each virtual group), and message-cost O(N), and Domain-Specific Query and Discovery Protocol (DSQDP) searches nodes in only specific domains with time complexity O(nvg), space complexity O(nvg), and message-cost O(nvg). In this paper, we also describe VDHA, its formal definition, and Grid Group Management Protocol.
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Received: 10 January 2003
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