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基于互联网的虚拟计算环境(iVCE)是一种新型网络计算平台.互联网资源的成长性、自治性和多样性等自然特性给iVCE中的资源共享带来巨大的挑战.DHT覆盖网(简称DHT)具有可扩展、延迟低、可靠性高等优点,是iVCE实现资源有效共享的重要途径之一.拓扑构建是DHT的基础性关键技术,实现了DHT的动态维护与消息路由等基本功能.本文首先概述传统DHT的拓扑构建技术,主要包括各种典型DHT的动态维护机制与消息路由算法、支持复杂查询的DHT索引构建技术,以及支持管理域匹配的DHT分组构建技术等;进而针对互联网资源的特点,综述在iVCE中DHT拓扑构建技术的最新研究进展.本文在最后对DHT拓扑构建技术的未来发展方向进行探讨.
The Internet-based virtual computing environment (iVCE) is a new type of network computing platform, and the natural features such as growth, autonomy and diversity of Internet resources pose a huge challenge to resource sharing in iVCE.DHT Overlay Network (DHT) Has the advantages of scalability, low delay and high reliability, and is one of the important ways for iVCE to effectively share resources.Configuration of topology is the key technology of DHT and realizes the basic functions of dynamic maintenance and message routing of DHT. The topology construction technology of traditional DHT mainly includes the dynamic maintenance mechanism and message routing algorithm of various typical DHTs, the DHT index construction technology supporting complex queries, and the DHT group construction technology supporting the management domain matching. In view of the characteristics of Internet resources, The latest research progress of DHT topology construction technology in iVCE is reviewed.Finally, the future development of DHT topology construction technology is discussed.