ITR: Intelligent Networks for Resilient Web Services

分布式应用程序包含来自多个管理域的组件，由于缺乏中央管理机构，因此对可伸缩性和可用性提出了挑战。本项目在Web服务体系结构的上下文中研究客户端和服务之间的网络路径上的应用程序级智能是否有助于解决这些挑战。智能体现在检测客户端流量的模块中，对复制、请求重定向或允许控制等服务动作做出决策，并最终实现这些动作。该项目结合了一个系统架构，用于在中间路由节点执行特定于服务的操作，与应用中立的算法相结合，用于服务更靠近网络边缘的客户端请求。体系结构和算法都使用语义框架，该框架将服务请求视为对（物理或虚拟）数据库的结构化访问。该活动的智力优点包括：(1)开发了新的技术和算法，用于自动扩展基于组件的服务，以响应不利的客户端和网络工作负载条件；(2)研究更靠近网络边缘的安全有效地实现客户端请求特定服务操作的体系结构。该活动的更广泛影响包括：(1)提高国家网络基础设施抵御恶意攻击的弹性的技术；(2)将研究成果整合到本科课程中，培养学生构建基于组件的分布式系统的能力。

Distributed applications comprising components from multipleadministrative domains, pose scalability and availability challengesbecause of the lack of a central administrative authority. Thisproject investigates, in the context of the Web Services architecture,whether application-level intelligence on the network path betweenclients and services can help address these challenges. Theintelligence is embodied in modules for inspecting client traffic,making decisions about service actions such as replication, requestredirection, or admission control, and finally realizing theseactions. The project combines a system architecture for executingservice-specific actions at intermediate routing nodes withapplication-neutral algorithms for servicing client requests closer tothe network edge. Both the architecture and the algorithms work witha semantic framework, which treats service requests as structuredaccesses against a (physical or virtual) database.The intellectual merits of the activity include (1) development ofnovel techniques and algorithms for automatically scalingcomponent-based services in response to adverse client and networkload conditions; and (2) investigation of architectures for securelyand efficiently realizing service-specific actions on client requestscloser to the network edge.Broader impacts of the activity include (1) techniques for improvingthe resilience of the nation's cyber-infrastructure against maliciousattacks; and (2) integration of the research results into anundergraduate-level course that will train students to buildcomponent-based distributed systems.