云计算服务的大规模计算网络论文.docVIP

. PAGE . 摘 要 众所周知，云计算被视为科技界的下一次革命，它将带来工作方式和商业模式的根本性改变。追根溯源，云计算与并行计算、分布式计算和网格计算不无关系，更是虚拟化、效用计算等技术混合演进的结果，云计算是一种基于互联网的计算新方式，通过互联网上异构、自治的服务为个人和企业提供按需即取的计算。云计算的资源是动态易扩展而且虚拟化的，通过互联网提供，终端用户不需要了解“云”中基础设施的细节，不必具有相应的专业知识，也无需直接进行控制，只关注自己真正需要什么样的资源以及如何通过网络来得到相应的服务。 云计算是基于互联网的相关服务的增加、使用和交付模式，通常涉及通过互联网来提供动态易扩展且经常是虚拟化的资源。云是网络、互联网的一种比喻说法。过去在图中往往用云来表示电信网，后来也用来表示互联网和底层基础设施的抽象。狭义云计算指 HYPERLINK /view/30.htm \t _blank IT基础设施的交付和使用模式，指通过网络以按需、易扩展的方式获得所需资源；广义云计算指服务的交付和使用模式，指通过网络以按需、易扩展的方式获得所需服务。这种服务可以是IT和 HYPERLINK /view/37.htm \t _blank 软件、 HYPERLINK /view/6825.htm \t _blank 互联网相关，也可是其他服务。它意味着计算能力也可作为一种商品通过互联网进行流通。 本文主要讨论云计算的概念及基本原理，分析了云计算的优势及面对的问题，对云计算和网格计算进行了比较，对云计算的发展进行了展望，现阶段它同样面临巨大挑战 关键词：云计算 网格计算 IT 应用市场 安全云计算 Take to As everyone knows, cloud computing is regarded as the industry s next revolution, it will bring the working methods and business model fundamental change. Find by hard and thorough search, cloud computing and parallel computing, distributed computing and grid computing is related, more virtual, utility computing technologies such as hybrid evolution results, cloud computing is a new calculation mode based on Internet, Internet via heterogeneous, autonomous service for individuals and businesses to provide on-demand from calculation. Cloud computing resources are dynamically extensible and virtualization, available through the Internet, users dont need to know the cloud of infrastructure in the details, do not have to have the corresponding professional knowledge, also need not directly control, only concerned about their real need what kind of resource and how to pass a network to receive the corresponding service. Cloud computing is Internet based service related to the increase in use, and the mode of delivery, usually involving via the Internet to provide dynamic is easy to be extended and often virtualized resources. Cloud is a network, the Internet as a metaphor. The past in the graph often use the cloud to said telecommunication network, and later also used