Vincent Liu

Assistant Professor @ Penn CIS

Levine Hall North Rm 574
3330 Walnut Street
Philadelphia, PA 19104-6389

I am looking for PhD students! If you are interested, please apply here.

CV (January 2020)


CIS 553: Networked Systems (Spring 2021)
CIS 455/555: Internet and Web Systems (Fall 2020)
CIS 800: PhD Special Topic: Old and New Research in Networked Systems (Fall 2018)
CIS 700-5: The Design and Implementation of Cloud Networks (Spring 2017)

About Me

I am an assistant professor in the Department of Computer and Information Science at the University of Pennsylvania. Before Penn, I got my Ph.D. at the University of Washington working (primarily) with Tom Anderson and Arvind Krishnamurthy. Before that, I received my B.S. in Computer Science at the University of Texas where I worked with Calvin Lin.

My research interests are in the broad areas of distributed systems and networking, and my projects have touched on fault-tolerance, security, data centers, wireless networks, clean-slate Internet architecture, routing/addressing, and the economic aspects of the Internet. My undergraduate research was in the area of compilers and parallel systems.


I also work closely with John Sonchack (student of Johnathan Smith, now at Princeton), João Sedoc (student of Lyle Ungar, now at NYU Stern), and Max Demoulin (student of Boon Thau Loo and Linh T. X. Phan).



Fault-tolerant and Transactional Stateful Serverless Workflows
Haoran Zhang, Adney Cardoza, Peter Baile Chen, Sebastian Angel, and Vincent Liu
OSDI, Nov 2020 [PDF][code]

Aragog: Scalable Runtime Verification of Shardable Networked Systems
Nofel Yaseen, Behnaz Arzani, Ryan Beckett, Selim Ciraci, and Vincent Liu
OSDI, Nov 2020 [PDF][code]

Mantis: Reactive Programmable Switches
Liangcheng Yu, John Sonchack, Vincent Liu
SIGCOMM, Aug 2020 [PDF][code]

Scouts: Improving the Diagnosis Process Through Domain-customized Incident Routing
Jiaqi Gao, Nofel Yaseen, Robert MacDavid, Felipe Vieira Frujeri, Vincent Liu, Ricardo Bianchini, Ramaswamy Aditya, Xiahoang Wang, Henry Lee, David Maltz, Minlan Yu, and Behnaz Arzani
SIGCOMM, Aug 2020 [PDF]

Understanding the Effect of Data Center Resource Disaggregation on Production DBMSs
Qizhen Zhang, Yifan Cai, Xinyi Chen, Sebastian Angel, Ang Chen, Vincent Liu, and Boon Thau Loo
VLDB, Aug 2020 [PDF]

tpprof: A Network Traffic Pattern Profiler
Nofel Yaseen, John Sonchack, Vincent Liu
NSDI, Feb 2020 [PDF][code]

Rethinking Data Management Systems for Disaggregated Data Centers
Qizhen Zhang, Yifai Cai, Sebastian Angel, Ang Chen, Vincent Liu, and Boon Thau Loo
CIDR, Jan 2020 [PDF]


TMC: Pay-as-you-Go Distributed Communication

Detecting Asymmetric Application-layer Denial-of-Service Attacks In-Flight with FineLame
Henri Maxime Demoulin, Isaac Pedisich, Nikos Vasilakis, Vincent Liu, Boon Thau Loo, and Linh T.X. Phan
ATC, Jul 2019 [PDF]

Optimizing Declarative Graph Queries at Large Scale
Qizhen Zhang, Akash Acharya, Hongzhi Chen, Simran Arora, Ang Chen, Vincent Liu, and Boon Thau Loo
SIGMOD, Jun 2019 [PDF]


Fast Network Simulation Through Approximation
or: How Blind Men Should Describe Elephants
Charles W. Kazer, João Sedoc, Kelvin K.W. Ng, Vincent Liu, and Lyle H. Ungar
HotNets, Nov 2018 [PDF]

Synchronized Network Snapshots
Nofel Yaseen, John Sonchack, Vincent Liu
SIGCOMM, Aug 2018 [PDF][code]


High-Resolution Measurement of Data Center Microbursts
Qiao Zhang, Vincent Liu, Hongyi Zeng, Arvind Krishnamurthy
IMC, Nov 2017 [PDF]

Predicting Startup Crowdfunding Success through Longitudinal Social Engagement Analysis
Qizhen Zhang, Tengyuan Ye, Meryem Essaidi, Shivani Agarwal, Vincent Liu, and Boon Thau Loo
CIKM, Nov 2017


Canaries in the Network
Danyang Zhuo, Qiao Zhang, Xin Yang, Vincent Liu
HotNets, Nov 2016 [PDF][PPT]

RackCC: Rack-level Congestion Control


Subways: A Case for Redundant, Inexpensive Data Center Edge Links

Designing Distributed Systems Using Approximate Synchrony in Data Center Networks
Dan R. K. Ports, Jialin Li, Vincent Liu, Naveen Kr. Sharma, Arvind Krishnamurthy
Best Paper, NSDI, May 2015 [PDF]


Enabling Instantaneous Feedback with Full-duplex Backscatter
Vincent Liu, Vamsi Talla, Shyamnath Gollakota
MOBICOM, Sep 2014 [PDF][PPT]


Ambient Backscatter: Wireless Communication Out of Thin Air
Vincent Liu, Aaron Parks, Vamsi Talla, Shyamnath Gollakota, David Wetherall, Joshua R. Smith
Best Paper, SIGCOMM, Aug 2013 [PDF][PPT][Website]

Expressive Privacy Control with Pseudonyms

F10: A Fault-Tolerant Engineered Network
Vincent Liu, Daniel Halperin, Arvind Krishnamurthy, Thomas Anderson
Best Paper, NSDI, Apr 2013 [PDF][PPT]


Tor Instead of IP
Vincent Liu, Seungyeop Han, Arvind Krishnamurthy, Thomas Anderson
HotNets, Nov 2011 [PDF]