Collaborative Research: FIND: NetSerV - Architecture of a Service-Virtualized Internet

项目总结尽管S取得了巨大的成功，还是因为互联网的缘故，它再次表现出了很强的抵抗力，试图为网络核心添加新功能。这种两难境地导致了最近网络使用覆盖网络实现服务的趋势；覆盖网络为终端系统提供了与其他系统协作以实现增强功能的机会，而不必修改路由器。然而，由于覆盖网络运行在应用层，它们不能有效地利用网络服务可用的资源。针对当前Internet中服务的局限性，基于服务虚拟化的概念，提出了一种全新的Internet体系结构NetServ。NetServ努力打破互联网服务提供的功能，并将这些功能作为网络服务的模块化构建块提供。构建块有效地封装了网络节点实现的网络资源或功能，如链路监控数据或路由表，并提供了可调的参数，便于配置。这些构建块构成了实施成熟的网络服务的基础，然后应用程序可以使用这些服务。此外，新框架处理服务发现、分发和管理的各个方面，从而使新服务更容易部署。该项目解决了新服务架构中的五个主要研究挑战：i)服务虚拟互联网架构的需求的定义，ii)模块化、虚拟服务的架构框架的设计，iii)识别一组初始的关键构建块，它们共同为公共网络服务提供基础，iv)开发用于服务发现和服务分发的机制和协议，设计和实现了一个基于NetServ架构的内容分发服务，并通过构建一个内容分发服务原型验证了NetServ方法的可行性。该服务将与对各种应用程序至关重要的另外两个服务相互作用：通用命名服务和网络监控服务。命名服务能够命名各种网络实体(如内容、用户、服务和设备)，同时遵守策略约束。提供的网络监控服务使应用程序可以获得网络性能数据。总体来说，本工作的目标是开发一个为核心网络服务提供高效和可扩展的体系结构的体系结构，实现一个新体系结构的原型，设计和实现一个内容分发服务的原型来演示NetServ的可行性，并在模拟环境和类似Geni的试验台上对新的体系结构进行评估。服务仅假设节点提供分组传输，并且可能提供可用于访问资源的构建块。因此，下一代互联网服务的新体系结构为网络服务提供了高效和灵活的基础，使未来的互联网高度演进，并将服务与特定技术解耦。广泛影响：这项工作将使互联网以服务为中心，使服务能够直接利用网络资源作为构建块。NetServ可以作为一个极好的容器，用于集成其他机构正在进行的其他查找工作。该项目还将为研究生和本科生的实验和理论网络课程做出贡献，并让代表性不足的群体参与其研究工作。

PROJECT SUMMARYDespite or because of the Internet?s great success, it has shown itself to be very resistant again attempts to add new functionality to the network core. This dilemma lead to the recent trend in networking to implement services using overlay networking; overlay networking provides an opportunity for end systems to collaborate with others to achieve enhanced functions without having to modify routers. However, since overlay networks operate at the application layer, they cannot effectively use the resources that are available to network services.To address the limitations of services in the current Internet, this work presents a clean slate Internet architecture, called NetServ, based on the concepts of service virtualization. NetServ strives to break up the functions provided by Internet services and to make these functionalities available as modular building blocks for network services. A building block effectively encapsulates a network resource or function realized by a network node, such as link monitoring data or routing tables, and provides tunable parameters for easy configurability. These building blocks form a foundation for the implementation of full-fledged network services, which can then be used by applications. Furthermore, the new framework handles aspects of service discovery, distribution and management, thereby making new services more readily deployable.This project addresses five major research challenges in the new service architecture: i) the definition of requirements for a service-virtualized Internet architecture, ii) the design of an architectural framework for modular, virtualized services, iii) the identification of an initial set of key building blocks, which together can provide a foundation for common network services, iv) the development of mechanisms and protocols for service discovery and service distribution, and v) the design and implementation of a content distribution service based on the NetServ architecture.The feasibility of the NetServ approach will be demonstrated by building the prototype of a content distribution service. This service will interwork with two other services that are crucial for a variety of applications: a generalized naming service and a network monitoring service. The naming service is capable of naming a variety of network entities (like content, users, services, and devices), while obeying policy constraints. The network monitoring service provides makes network performance data available to applications. Overall, the objective of this work is to develop an architecture that provides an efficient and extensible architecture for core network services, to implement a prototype of the new architecture, design and implement a prototype of a content distribution service to demonstrate the feasibility of NetServ, and to evaluate the new architecture in a simulation environment as well as on a GENI-like test bed.Intellectual Merit: NetServ fully decouples service execution from packet forwarding on a network node. A service only assumes that a node provides packet transport and possibly offers building blocks that can be used to access resources. The new architecture for next-generation Internet services, therefore, provides an efficient and flexible foundation for network services, makes the future Internet highly evolvable, and decouples services from a specific technology.Broader Impact: This work will make the Internet service-centric and enable services to directly utilize network resources as building blocks. NetServ can serve as an excellent container for integrating other ongoing FIND work at other institutions. This project will also contribute to both the graduate and undergraduate experimental and theoretical networking curriculum, and involve under-represented groups within its research efforts.