Jin Yong Ha

I joined the Department of Computer Science and Engineering at Ewha Womans University as an Assistant Professor in March 2026. Prior to this, I was a Staff Engineer at Samsung Electronics, which was my first professional affiliation following my master's degree. I earned my Ph.D. in Computer Science from Seoul National University in 2025 under the supervision of Professor Hyeonsang Eom. I also hold B.S. and M.S. degrees from Sungkyunkwan University, received in 2013 and 2015, respectively. My research focuses on performance optimization for software systems, with particular emphasis on operating systems, file and storage systems, database management systems (DBMS), and distributed storage systems.

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Education

Ph.D at Seoul National University, 2021.3-2025.8
M.S. at Sungkyunkwan University, 2013.3-2015.2
B.S. at Sungkyunkwan University, 2007.3-2013.2
Gyeonggi Science High School, 2005.3-2007.2

Work Experience

Assistant professor at Ewha Womans University 2026.3-Present
Software engineer at Samsung Electronics, 2013.3-2026.2

Publication (Conference)

Ha, J. Y., Lee, S., Eom, H., & Son, Y. (2025). {ScaleLFS}: A Log-Structured File System with Scalable Garbage Collection for Commodity SSDs. In 23rd USENIX Conference on File and Storage Technologies (FAST 25) (pp. 53-67).
Ha, J. Y., Lee, S., Yeom, H. Y., & Son, Y. (2024). RL-Watchdog: A Fast and Predictable SSD Liveness Watchdog on Storage Systems. In 2024 USENIX Annual Technical Conference (USENIX ATC 24) (pp. 1083-1100).
Ha, J. Y., & Yeom, H. Y. (2023, March). zCeph: Achieving High Performance on Storage System Using Small Zoned ZNS SSD. In Proceedings of the 38th ACM/SIGAPP Symposium on Applied Computing (pp. 1342-1351).
Son, Y., Kang, H., Ha, J. Y., Lee, J., Han, H., Jung, H., & Yeom, H. Y. (2016, September). An empirical evaluation of enterprise and SATA-based transactional solid-state drives. In 2016 IEEE 24th International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS) (pp. 231-240). IEEE.
Ha, J. Y., Lee, Y. S., & Kim, J. S. (2013, November). Deduplication with block-level content-aware chunking for solid state drives (SSDs). In 2013 IEEE 10th International Conference on High Performance Computing and Communications & 2013 IEEE International Conference on Embedded and Ubiquitous Computing (pp. 1982-1989). IEEE.

Publication (Journal)

Ha, J. Y., & Son, Y. (2025). zCeph: Design and implementation of a ZNS-friendly distributed file system. Future Generation Computer Systems, 169, 107763.
Yoo, J., Oh, J., Lee, S., Won, Y., Ha, J. Y., Lee, J., & Shim, J. (2018). OrcFS: Orchestrated file system for flash storage. ACM Transactions on Storage (TOS), 14(2), 1-26.

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