Service Diferentiation and Overload Control in Internet Servers

不断增加的互联网应用数量和不断发展的类型促使互联网基础设施提供更好的服务。在互联网的联网方面正在进行大量的工作。为补充这些努力，首席调查员(PI)建议在服务一级探讨这些问题。具体地说，该建议解决了对互联网服务器中的服务区分和过载控制的支持。首先，电子商务和持续媒体传输等不断发展的应用程序将从差异化服务模式中受益匪浅。其次，在下一代互联网中采用(最有可能的)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进行互惠。这方面的研究将分两步进行：(A)制定区分服务的算法；(B)评估区分服务的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。过载会导致服务器性能严重下降，甚至崩溃。由于服务器超载，电子商务企业遭受了严重的经济损失。通过在服务器上加入过载控制机制，可以大大降低过载服务器的性能降级。PI建议在应用程序层面解决过载控制机制的设计和实现。总的来说，通过采用服务区分和过载控制机制，互联网服务器的性能和功能将大大增强。建议的研究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，拟议的技术将是对下一代互联网方向努力的补充，并将有助于电子商务行业。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，这项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.