NeTS: CSR: Small: Towards a Redundancy Aware Network Stack

该研究项目将利用典型云环境中自然存在的冗余来提高应用程序性能。关键思想是让整个网络堆栈都知道副本，并设计主动使用重复请求的网络机制，以避免掉队。具体地说，这项研究将构建冗余感知网络堆栈(RAN)；在RAN中，应用程序将向网络公开有关冗余的信息(例如，数据存储在计算机A和计算机B中)。网络将使用利用该信息的新机制(例如，同时使用多个复制品的传输协议)。通过探索应用和网络的协同设计，本项目将在协议栈的不同层次上取得研究进展，这包括至少四个不同方面的创新：i)调度框架，ii)应用和网络之间的抽象和接口，iii)新的网络机制(传输，网内机制)，以及iv)利用新机制的新的应用设计。这项研究将解决为不同资源(例如，网络)实施该框架的挑战。RANS承诺克服落后者带来的问题。这将减少应用程序延迟，特别是在尾部，这是应用程序提供商的主要担忧。拟议的研究将在设计系统和网络协议以提高数据中心应用程序的性能方面取得根本性进展。这项研究将对各种利益相关者产生重大影响，包括互联网用户、云服务提供商以及网络研究人员和学生。最终用户在使用现有应用程序时将体验到更好的性能。云服务提供商可以部署需要高可靠性和高性能的新应用。研究人员将从开源软件产品中受益，学生将从云计算黑客松研讨会和研究项目机会中受益。

This research project will leverage redundancy, which is naturally present in typical cloud environments, to improve application performance. The key idea is to make the entire network stack aware of replicas, and to design network mechanisms that pro-actively use duplicate requests to avoid stragglers. Specifically, this research will build a redundancy aware network stack (RANS); in RANS, applications will expose information about redundancy to the network (e.g., data is stored in both machine A and machine B). The network will use new mechanisms that leverage this information (e.g., transport protocol that uses multiple replicas at the same time). Applications will be modified to make full use of the new mechanisms.By exploring the co-design of the application and the network, this project will make research advances at different levels of the protocol stack.This includes innovation in at least four different aspects: i) scheduling framework, ii) abstraction and interface between the applications and the network, iii) new network mechanisms (transport, in-network mechanisms), and iv) new application designs that exploit the new mechanisms. This research will address the challenges of implementing this framework for different resources (e.g., network). RANS promises to overcome the problems caused by stragglers. This will reduce application latency, especially at the tail, which is a major concern for application providers.The proposed research will make fundamental advances in designing systems and network protocols to improve performance of data center applications. This research will have significant impact on various stakeholders, including Internet users, cloud service providers, and researchers and students of networking. End users will experience better performance while using existing applications. Cloud service providers can deploy new applications that require high reliability and performance. Researchers will benefit from the open source software artifacts and students will benefit from a cloud computing Hackathon workshop and opportunities for research projects.