CAREER: Ensuring Sustainable Scalability for Globally-Distributed Systems

在过去的几年中，大规模网络系统的数量不断增长。这些系统中的大多数都是按照覆盖方法构建的，每个系统都定期和独立地探测其环境，以指导路径选择算法，绕过故障链接并复制内容的可用性。随着这些系统的普及，这种方法将导致不可持续的监控程度，并限制分布式服务的种类、数量和范围。该项目的主旨是，通过战略性地重用由长期运行的、无处不在的服务（如cdn和p2p系统）收集的网络视图，可以构建很大一部分全球分布式系统，以确保可持续的可扩展性。这项工作定义并探索了“3R”——一种设计和实现分布式系统的新方法，其重点是通过战略性地重用环境视图和回收以前收集的测量值来最小化聚合控制和管理开销。特别是，我们正在设计有效的技术来维护、访问和重用这些信息，以构建下一代流多播、内容分发和数据共享应用程序。这项工作探讨了环境测量的回收/再利用中的权衡，以及它们对分布式系统设计的影响。最终，它将促进广域应用的部署，使整个社会受益。研究议程还辅之以一项全面的教育和外联计划，以加强实验系统教育并促进少数民族的征聘和保留。

The past few years have witnessed a growing number of large-scalenetworked systems. Most of these systems are built following anoverlay approach, with each of them regularly and independentlyprobing its environment to guide path selection algorithms, routearound faulty links and replicate content for availability. As thesesystems grow in popularity, such an approach will result in anunsustainable degree of monitoring and restrict the variety, numberand span of distributed services.The thesis of this project is that a large fraction ofglobally-distributed systems can be built to ensure sustainablescalability by strategically reusing the view of the network gatheredby long-running, ubiquitous services such as CDNs and P2Psystems. This work defines and explores "3R" - a new approach to thedesign and implementation of distributed systems that focuses onminimizing aggregated control and administrative overhead bystrategically reusing environment's views and recycling previouslygathered measurements. In particular, we are designing efficienttechniques for maintaining, accessing and reusing this information forbuilding next-generation streaming multicast, content distribution anddata sharing applications.The work explores the tradeoffs in the recycling/reuse ofenvironmental measurements, and their implication indistributed-system design. Ultimately, it will facilitate deploymentsof wide-area applications, benefiting society at large. The researchagenda is complemented by a thorough education and outreach plan forstrengthening experimental systems education and contributing tominority recruitment and retention.