Keyun Cheng (程柯云)

Ph.D. Student Department of Computer Science and Engineering The Chinese University of Hong Kong Sha Tin, New Territories Hong Kong, China Office: Room 118, Ho Sin-Hang Engineering Building Email: kycheng [at] cse.cuhk.edu.hk [Google Scholar] [Github] [LinkedIn] [CV]

About

Keyun Cheng is a Ph.D. candidate at Department of Computer Science and Engineering, The Chinese University of Hong Kong. He is a member of Applied Distributed System Lab (ADSLab), supervised by Prof. Patrick P. C. Lee. He received the B.Eng. degree in Software Engineering from Sun Yat-Sen University in 2018, the M.Sc. degree in Computer Science from The Chinese University of Hong Kong in 2019. His research interests include distributed storage systems and erasure coding. He maintains a reading list.

Education

• 2020.08 - Present: Ph.D. in Computer Science and Engineering, The Chinese University of Hong Kong

• 2018.08 - 2019.07: M.Sc. in Computer Science, The Chinese University of Hong Kong

• 2014.08 - 2018.07: B.Eng. in Software Engineering, Sun Yat-Sen University

Publications

Conferences

1. [USENIX FAST 2026] “LESS is More for I/O-Efficient Repairs in Erasure-Coded Storage.”
   Keyun Cheng*, Guodong Li*, Xiaolu Li, Sihuang Hu, and Patrick P. C. Lee. (*: co-first author)
   Proceedings of the 24th USENIX Conference on File and Storage Technologies (FAST 2026), Santa Clara, CA, USA, February 2026. (CCF-A)
   (AR: 13/76 = 17.1%)
   

2. [SRDS 2024] “Harmonizing Repair and Maintenance in LRC-Coded Storage.”
   Keyun Cheng, Si Wu, Xiaolu Li, and Patrick P. C. Lee.
   Proceedings of the 43rd International Symposium on Reliable Distributed Systems (SRDS 2024), Charlotte, NC, USA, September 2024. (CCF-B)
   (AR: 27/87 = 31.0%)
   [pdf] [pptx] [code]

3. [USENIX FAST 2023] “ParaRC: Embracing Sub-Packetization for Repair Parallelization in MSR-Coded Storage.”
   Xiaolu Li, Keyun Cheng, Kaicheng Tang, Patrick P. C. Lee, Yuchong Hu, Dan Feng, Jie Li, and Ting-Yi Wu.
   Proceedings of the 21st USENIX Conference on File and Storage Technologies (FAST 2023), Santa Clara, CA, USA, February 2023 (CCF-A).
   (AR: 28/122 = 23.0%)
   [pdf] [pptx] [poster] [code]

4. [IEEE INFOCOM 2023] “Balancing Repair Bandwidth and Sub-packetization in Erasure-Coded Storage via Elastic Transformation.”
   Kaicheng Tang, Keyun Cheng, Helen H. W. Chan, Xiaolu Li, Patrick P. C. Lee, Yuchong Hu, Jie Li, and Ting-Yi Wu.
   Proceedings of IEEE International Conference on Computer Communications (INFOCOM 2023), New York, USA, May 2023. (CCF-A)
   (AR: 252/1312 = 19.2%)
   [pdf] [pptx] [code]

5. [MICCAI 2019 (Oral)] “Incorporating Temporal Prior from Motion Flow for Instrument Segmentation in Minimally Invasive Surgery Video.”
   Yueming Jin, Keyun Cheng, Qi Dou, and Pheng Ann Heng.
   Proceedings of the 22nd International Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI 2019), Shenzhen, China, Oct 2019. (CCF-B)
   (AR: 538/2625 = 29.7%)
   [pdf] [code]

Journals

1. [IEEE TPDS 2025] “Toward Load-Balanced Redundancy Transitioning for Erasure-Coded Storage.”
   Keyun Cheng, Huancheng Puyang, Xiaolu Li, Patrick P. C. Lee, Yuchong Hu, Jie Li, and Ting-Yi Wu.
   IEEE Transactions on Parallel and Distributed Systems (TPDS), 36(5), pp. 889-902, May 2025. (CCF-A)
   [pdf] [code] [corrections]

2. [ACM TOS 2025] “A Survey of the Past, Present, and Future of Erasure Coding for Storage Systems.”
   Zhirong Shen, Yuhui Cai, Keyun Cheng, Patrick P. C. Lee, Xiaolu Li, Yuchong Hu, and Jiwu Shu.
   ACM Transactions on Storage (TOS), 21(1), pp. 4:1-4:39, January 2025. (CCF-A)
   [pdf]

3. [IEEE TPDS 2022] “Fast Proactive Repair in Erasure-Coded Storage: Analysis, Design, and Implementation.”
   Xiaolu Li, Keyun Cheng, Zhirong Shen, and Patrick P. C. Lee.
   IEEE Transactions on Parallel and Distributed Systems (TPDS), 33(12), pp. 3400-3414, December 2022. (CCF-A)
   (An earlier version appeared in DSN 2019)
   [main pdf] [supp pdf] [code]

Academic Activities

Conference Reviewer

USENIX FAST (2025), IEEE ISIT (2024)

Journal Reviewer

IEEE TC, ACM TOS

Teaching

Awards

• Excellent TA Award for CSCI5550, Fall 2023, CUHK

Teaching Assistant, The Chinese University of Hong Kong

• CSCI5550 Advanced File and Storage Systems (Instructor: Patrick P. C. Lee)

  • Fall 2023

• CSCI1120B Introduction to Computing Using C++ (Instructor: Law Yat Chiu, King Tim Lam)

  • Fall 2022

• AIST3020 Introduction to Computer Systems (Instructor: Patrick P. C. Lee)

  • Spring 2023, Spring 2022

• CSCI4180 Introduction to Cloud Computing and Storage (Instructor: Patrick P. C. Lee)

  • Fall 2021

Teaching Assistant, Sun Yat-Sen University

• Probablity Theory and Statistics (Instructor: Weiqi Luo)

  • Fall 2017

• Complexity Analysis for Engineering (Instructor: Weiqi Luo)

  • Spring 2018

Selected Academic Awards

• Postgraduate Studentship, CUHK (2020 - 2025)

• Dean's List Scholarship, Faculty of Engineering, CUHK, 2019.

• First Prize Winner (top 3) of Distinguished Academic Performance Scholarship, M.Sc. in CS, CUHK, 2019.

• Second Class Scholarship, SYSU, 2017.

• First Class Scholarship, SYSU, 2016.

• Third Class Scholarship, SYSU, 2015.