Qizhen Zhang /


Apr. 2020Paper accepted by VLDB 2020
Oct. 2019Paper accepted by CIDR 2020
Mar. 2019Selected as the 2019-20 Jonathan M. Smith Fellow
Nov. 2018Paper accepted by SIGMOD 2019
Aug. 2017Paper accepted by CIKM 2017
Jul. 2017Paper accepted by SoCC 2017
Aug. 2016Started PhD study at University of Pennsylvania


I am a PhD student at Penn studying Computer Science advised by Prof. Vincent Liu and Prof. Boon Thau Loo. I am generally interested in the design and implementation of large-scale software systems. Currently, I am focusing on scaling data-intensive systems in data centers. My research has combined techniques in data processing/management systems, data center networks, cloud computing, and machine learning.


  • University of Pennsylvania, Summer 2016 - Now
    Data processing/management systems, data center networks.
  • Microsoft Research, Redmond, Summer 2019
    Query optimization. [Data Management]
  • NEC Labs, America, Summer 2018
    Software behavior analysis based on provenance graphs. [Data Provenance]
  • Chinese University of Hong Kong, Summer 2015 - Summer 2016
    1. Modeling resource costs and performance of big graph processing systems. [Big Graph Analytics]
    2. Interactive querying on big graphs. [Big Graph Analytics, Distributed Systems]
  • Microsoft Research Asia (awarded as excellent intern), Winter 2014 - Summer 2015
    1. Cost allocation in cloud environment. [Cloud Computing]
    2. Resource allocation algorithms for Microsoft Azure. [Cloud Computing]
    3. Hacking Android to make its Camera module sharable by multiple applications. [Mobile Computing]



Understanding the Effect of Data Center Resource Disaggregation on Production DBMSs
Qizhen Zhang, Yifan Cai, Xinyi Chen, Sebastian Angel, Ang Chen, Vincent Liu, Boon Thau Loo
International Conference on Very Large Data Bases, VLDB 2020 [To appear]

Rethinking Data Management Systems for Disaggregated Data Centers
Qizhen Zhang, Yifan Cai, Sebastian Angel, Ang Chen, Vincent Liu, Boon Thau Loo
Conference on Innovative Data Systems Research, CIDR 2020

Optimizing Declarative Graph Queries at Large Scale
Qizhen Zhang, Akash Acharya, Hongzhi Chen, Simran Arora, Ang Chen, Vincent Liu, Boon Thau Loo
ACM International Conference on Management of Data, SIGMOD 2019

Predicting Startup Crowdfunding Success through Longitudinal Social Engagement Analysis
Qizhen Zhang, Tengyuan Ye, Meryem Essaidi, Shivani Agarwal, Vincent Liu, Boon Thau Loo
ACM International Conference on Information and Knowledge Management, CIKM 2017

Architectural Implications on the Performance and Cost of Graph Analytics Systems
Qizhen Zhang, Hongzhi Chen, Da Yan, James Cheng, Boon Thau Loo, Purushotham Bangalore
ACM Symposium on Cloud Computing, SoCC 2017

Quegel: A General-Purpose System for Querying Big Graphs
Qizhen Zhang, Da Yan, James Cheng
Proceedings of the 2016 International Conference on Management of Data, SIGMOD 2016, pp. 2189-2192

A General-Purpose Query-Centric Framework for Querying Big Graphs
Da Yan, James Cheng, M. Tamer Özsu, Fan Yang, Yi Lu, John C. S. Lui, Qizhen Zhang, Wilfred Ng
Proceedings of the VLDB Endowment, PVLDB 2016, no. 7, 564-575

A Shapley Value Approach for Cost Allocation in the Cloud
Qizhen Zhang, Haoran Wang, Yang Chen, Tao Qin, Ying Yan, Thomas Moscibroda
ACM Symposium on Cloud Computing, SoCC 2015, Poster

PhoneProtector: Protecting User Privacy on the Android-Based Mobile Platform
Weizhe Zhang, Hui He, Qizhen Zhang, Tai-hoon Kim
International Journal of Distributed Sensor Networks, IJDSN 2014

Selected Awards & Honors


Jonathan M. Smith Fellow, Penn CIS, 2019-2020

Student Grants: Student Travel Award (2019, ACM SIGMOD), NSDI Student Grant (2018, USENIX), SIGIR Student Travel Grant (2017, ACM SIGIR), CIKM Travel Award (2017, NSF and SIGWEB)

PhD Fellowship, University of Pennsylvania, 2016

MSRA Excellent Intern Award: Star of Tomorrow, Microsoft Research Asia, 2014

Best Commercial Potential Award (US $30K) for Hackathon, Beijing, Leiphone.com, 2013

Excellent Bachelor's Thesis Award, Harbin Institute of Technology, 2013

National Scholarship, China Ministry of Education, 2013

Meritorious Award for Interdisciplinary Contest in Modeling, Consortium for Mathematics and Its Applications, 2012

National Scholarship, China Ministry of Education, 2012

Last edit in April, 2020