The Chinese University of Hong Kong
Department of Computer Science and Engineering

Regular Department Seminar Series

Title: Erasure Coding for Data Center Storage
Date: January 12, 2018 (Friday)
Time: 4:00 p.m. - 5:00 p.m.
Venue: Room 121, 1/F, Ho Sin-hang Engineering Building,
The Chinese University of Hong Kong,
Shatin, N.T.
Speaker: Prof. Patrick Lee
Associate Professor
Department of Computer Science and Engineering
The Chinese University of Hong Kong



Data center storage systems increasingly adopt erasure coding to reduce the storage overhead of traditional 3-way replication. However, maintaining high performance in erasure-coded data center storage systems remains challenging. In this talk, I will present new results on how to seamlessly adapt erasure codes into data-center architectures. In particular, I will present repair pipelining, a general technique that speeds up the repair performance in erasure-coded storage, such that it can reduce the repair time to approximately the same as the normal read time by slicing the repair operation via a linear chain. This creates opportunities for applying erasure coding to frequently accessed data for high storage efficiency, while preserving read performance.



Patrick Lee is now an Associate Professor of the Department of Computer Science and Engineering at the Chinese University of Hong Kong. He currently heads the Applied Distributed Systems Lab ( and is working very closely with a group of graduate students on different projects in networks and systems. His research interests are in various applied/systems topics including storage systems, distributed systems and networks, operating systems, dependability, and security. Please refer to for Patrick's papers and open-source software.


Tea, coffee and cookies will be provided after seminar.


Enquiries: Ms. Crystal Tam at tel. 3943 8439

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