Helen is currently a Postdoc at The Chinese University of Hong Kong (CUHK), working on cloud-based storage solutions. She is interested in exploring and building reliable and efficient storage solutions.

She received the B.Eng. degree in Computer Engineering and the Ph.D. degree in Computer Science and Engineering from The Chinese University of Hong Kong in 2013 and 2018, respectively. She was supervised by Prof. Patrick P. C. Lee during her Ph.D. studies, as a member of the Applied Distributed Systems Lab (ADSLab). She was an R&D Engineer at Unissoft Technology Co. Ltd. in 2019, developing the multi-cloud storage system, nCloud, and conducting external proof-of-concepts and trials of the system.

  • HashKV: Hash-based data grouping in LSM-tree-based Key-Value stores for efficient updates and GC atop key-value separation
  • MemEC: In-Memory Erasure-Coded key-value store for efficient storage and operations of small key-value objects
  • EPLog: Elastic Parity Logging scheme for improved endurance, reliability, and performance of SSD arrays under update-intensive workloads
  • CodFS: Parity logging with reserved space for mitigating update overheads in Erasure-Coded File Systems

  1. Kaicheng Tang, Keyun Cheng, Helen H. W. Chan, Xiaolu Li, Patrick P. C. Lee, Yuchong Hu, Jie Li, and Ting-Yi Wu. 2023. Balancing Repair Bandwidth and Sub-packetization in Erasure-Coded Storage via Elastic Transformation. In Proceedings of IEEE International Conference on Computer Communications 2023 (INFOCOM 2023).
  2. Yongkun Li, Helen H. W. Chan, Patrick P. C. Lee, and Yinlong Xu. Enabling Efficient Updates in KV Storage via Hashing: Design and Performance Evaluation. ACM Transactions on Storage (TOS), 15(3), 20:1-20:29, August 2019. (An earlier version appeared in USENIX ATC 2018)
  3. Helen H. W. Chan, Yongkun Li, Patrick P. C. Lee, and Yinlong Xu. 2018. HashKV: Enabling Efficient Updates in KV Storage via Hashing. In Proceedings of the 2018 USENIX Annual Technical Conference (USENIX ATC).
  4. Helen H. W. Chan, Yongkun Li, Patrick P. C. Lee, and Yinlong Xu. 2018. Elastic Parity Logging for SSD RAID Arrays: Design, Analysis, and Implementation. IEEE Transactions on Parallel and Distributed Systems (TPDS), 29(10), pp. 2241-2253, Oct. 2018. (An earlier version appeared in DSN 2016)
  5. Matt M. T. Yiu, Helen H. W. Chan, and Patrick P. C. Lee. 2017. Erasure Coding for Small Objects in In-Memory KV Storage. In Proceedings of the 10th ACM International Systems and Storage Conference (SYSTOR).
  6. Yongkun Li, Helen H. W. Chan, Patrick P. C. Lee, and Yinlong Xu. 2016. Elastic Parity Logging for SSD RAID Arrays. In Proceedings of the 46th Annual IEEE/IFIP International Conference on Dependable Systems and Networks (DSN) (Regular paper).
  7. Jeremy C. W. Chan, Qian Ding, Patrick P. C. Lee, and Helen H. W. Chan. 2014. Parity logging with reserved space: towards efficient updates and recovery in erasure-coded clustered storage. In Proceedings of the 12th USENIX conference on File and Storage Technologies (FAST).
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  • Best TA award (out of four recipients): 2014-15, 2015-16
  • Certificate of Merit: 2016-17
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A quick introduction to YCSB (hands-on)

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Last updated: Jan 2, 2023