Service Diferentiation and Overload Control in Internet Servers

Internet应用程序的数量和类型不断增加，要求Internet基础设施提供增强的服务。在因特网的联网方面正在进行大量的工作。为了补充这些努力，首席调查员（PI）建议在服务器级别探索问题。具体地说，这个建议解决了Internet服务器中对服务区分和过载控制的支持。在服务器上支持服务差异化是必要的，主要有两个原因。首先，电子商务和持续媒体传输等不断发展的应用将从差异化的服务模式中受益匪浅。其次，在下一代互联网中（很有可能）采用某种形式的服务差异化（在路由器级别），将要求服务器在其服务中做出回报。在此背景下提出的研究将分两个步骤进行：(a)制定服务差异化算法，以及(b)评估服务差异化互联网服务器的有效性和性能。由于互联网流量的突发性和不可预测性，服务器的过载是不可避免的。过载会导致严重的性能下降，甚至导致服务器崩溃。由于服务器过载，电子商务企业造成了严重的经济损失。通过在服务器上集成过载控制机制，可以大大降低过载服务器的性能下降。PI建议在应用程序级别处理过载控制机制的设计和实现。一般来说，采用服务区分和过载控制机制将大大提高Internet服务器的性能和功能。拟议研究的结果将对互联网基础设施及其用户产生更广泛的影响。具体地说，建议的技术将与下一代互联网方向的努力相辅相成，并将对电子商务行业有所帮助。它们还将促进对互联网中连续媒体对象的支持。在地方层面，研究将对密歇根州立大学的学生产生积极的教育影响。

The increasing volume and evolving types of Internet applications have beendemanding enhanced service from the Internet infrastructure. A significant amount ofwork is in progress on the networking aspects of the Internet. To complement theseefforts, the Principal Investigator (PI) proposes to explore the issues at the serverlevel. Specifically, this proposal addresses the support for service differentiation and overload control in Internet servers.Support for service differentiation at the servers is necessary because oftwo primary reasons. First, evolving applications like e-commerce and continuous mediatransmission will be highly benefited by the differentiated service model. Second, theadoption (most likely) of some form of service differentiation (at the router level)in the next-generation Internet will demand the servers to reciprocate in theirservices. The proposed research in this context will be approached in two steps: (a)formulation of algorithms for service differentiation, and (b) evaluation of theeffectiveness and performance of service differentiating Internet servers.Overloads at the servers are unavoidable because of the bursty andunpredictable nature of the Internet traffic. Overload causes severe performancedegradation or even crashes the server. E-commerce businesses incur serious financial lossesbecause of the overloaded servers. The performance degradation of overloaded serversmay be greatly reduced by incorporating overload control mechanisms at theservers. The PI proposes to address the design and implementation of overload controlmechanisms at the application level.In general, the performance and functionality of the Internet servers willbe greatly enhanced by the adoption of service differentiation and overload controlmechanisms.The outcome of the proposed research will have a broader impact on theInternet infrastructure and on its users. Specifically, the proposed techniques willbe complementary to the efforts in the direction of the next-generationInternet, and will be helpful for the e-commerce industry. They will also facilitate thesupport of continuous media objects in the Internet. At the local level, theresearch will have a positive educational impact on the students of Michigan StateUniversity.