Colloquium - Leveraging Over-provisioned WANs for Next-generation Services

Friday, October 1, 2021, 4:00pm to 5:00pm
MacLean Hall, 110
2 West Washington Street, Iowa City, IA 52240


Rachee Singh


The last decade has seen a large-scale commercialization of cloud computing and the emergence of global cloud providers. Cloud providers have rapidly expanded their datacenter deployments, network equipment and backbone capacity, preparing their infrastructure to meet the growing client demands. In this talk, I will re-examine the design and operation choices made by cloud providers in this phase of exponential growth using a cross-layer empirical analysis of the wide-area network (WAN) of a large commercial cloud provider. First, I will demonstrate how the knowledge of optical signal quality can enable traffic engineering systems to harness 75% more capacity from 80% of the optical wavelengths in the cloud backbone. Second, I will present the opportunity to minimize the hardware costs of provisioning long-haul WAN capacity by optically bypassing network hops where conversion of signals from optical to electrical domain is unnecessary and uneconomical. Identifying and fixing these inefficiencies in the operation of today's cloud networks is crucial for enabling next-generation cloud services.


Rachee Singh is a senior researcher in the office of the CTO at Azure for Operators. Before this, she was a researcher in the Mobility and Networking group of Microsoft Research, Redmond. Her research interests are in computer networking with a focus on wide area network performance and monitoring. She has a PhD in Computer Science from the University of Massachusetts, Amherst and is a recipient of the Google PhD fellowship in Systems and Networking. Recently, she was named a rising star in computer networking by N2Women and a rising star in EECS by UC Berkeley. In a previous life, she developed routing protocol features for Ethernet switches at Arista Networks. 

In-person colloquia this Fall will also be streamed. [583807]

Attendance of those enrolled in CS:6000 will be taken in-person for in-person talks.

Individuals with disabilities are encouraged to attend all University of Iowa–sponsored events. If you are a person with a disability who requires a reasonable accommodation in order to participate in this program, please contact Matthieu Biger in advance at 3194670743 or