Sungjin Byeon (변성진, SJ, ジン, 卞成進)

Research Interests

File System, Zoned Storage, FDP Storage, NAND Flash Memory, Key-Value Database, Vector Database, BlockChain Storage, Memory Management

Publications

1. (Just Accepted) Sungjin Byeon*, Kyungwook Min*, Jaewan Park, Sangyun Lee, Hong-Yeon Kim, Junyoung Han, Joo-Young Hwang, Zhichao Cao and Youngjae Kim, ColdMap: Compaction-Aware Cost-Benefit Zone Cleaning for ZNS-Based Key-Value Stores, In Proceedings of ACM International Conference on Supercomputing, Belfast, UK, Northern Ireland, July, 2026, (ICS 2026), [pdf] [talk]

[Acceptance Rate : 51/243 = 20%]

2. Jaewan Park, Kyungwook Min, Sungjin Byeon, Taewan No, Hyunki Park, Xubin He, Hongyeon Kim, and Youngjae Kim, BucketLSM: Breaking the Compaction Scalability Barrier in LSM-Based Key-Value Stores, In Proceedings of IEEE International Symposium on Cluster, Cloud and Grid Computing  2026,  Australia, May, 2026 (CCGRID 2026), [pdf] [talk]

[Acceptance Rate : 62/247 = 24%]

[Best Student Paper Nominee]

Role as Co-Author: defining, writing and drawing Intra Compaction Parallelism Paradox and L0-L1-L2 Compaction serialization, conducting and tuning main experiments, proposing the name "Bucket" instead of Memtable Splitting for conceptual clarity; overall management of project as a student advisor.

3. Sangyun Lee, Sungjin Byeon, Soon Hwang, Jaewan Park, Jooyoung Hwang, Junyeong Han, Javier González, Awais Khan and Youngjae Kim, SlimIO: Lightweight I/O Path Design for Write Isolation in FDP-backed In-Memory Databases, In Proceedings of International Parallel Data Systems Workshop (PDSW) held in conjunction with SC25, St. louis, MO, USA, November, 2025, (PDSW 2025), [pdf] [talk]

[Acceptance Rate : 7/16 =44%]

Role as Co-Author: Implementing a main testbed(FDP Emulator), writing FDP Section, proposing recovery experiment, overall proofreading.

4. Hamin Hwangbo*, Joseph Ro*, Sungjin Byeon, Safdar Jamil, Junyoung Han, Jooyoung Hwang and Youngjae Kim, Towards A Unified Garbage Collection Strategy in ZNS Key-Value Store File Systems Using Same-Victim GC, In Proceedings of the IEEE Int'l Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS 2024), Krakow, Poland, October, 2024. [pdf] [talk]

[Acceptance Rate : 25%]

Role as Co-Author: crystalizing motivation diagram model and YBIZ metric, drawing design overview, overall proofreading.

5. Sungjin Byeon, Joseph Ro, Jun Young Han, Jeong-Uk Kang, Youngjae Kim, Ensuring Compaction and Zone Cleaning Efficiency through Same-Zone Compaction in ZNS Key-Value Store, In Proceedings of the 38th International Conference on Massive Storage Systems and Technology (MSST 2024), Santa Clara, CA, USA, June, 2024. [pdf] [talk]

[Acceptance Rate : 27/66 = 40.9%]

6. Sungjin Byeon, Joseph Ro, Safdar Jamil, Jeong-Uk Kang, Youngjae Kim, A Free-Space Adaptive Runtime Zone-Reset Algorithm for Enhanced ZNS Efficiency, In Proceedings of the 15th Workshop on Hot Topics in Storage and File Systems (HotStorage 2023), Boston, MA, USA, July 9, 2023. [pdf] [talk]

[Acceptance Rate : 17/43 = 39.5%]

7. Sungjin Byeon, An Tradeoff Breaking Storage Design for FDP SSD,  submitted to conference

8. Donghyun Min, Sungjin Byeon, An SLO guaranteed scheduler for NDP-based Vector Storage, submitted to conference

On-Going Projects

1. A DramLess Blockchain system

2. Dynamic LSM-tree

3. Compatible File system for High Performance Zone Namespace SSD

Educations

• Ph.D in SCAI in Arizona State University (Advisor: Zhichao Cao, Fall 2026-)

• M.S in Computer Science and Engineering in Sogang University (Advisor: Youngjae Kim, Mar 2024 ~ Feb 2026)

• B.S in Computer Science and Engineering in Sogang University (Sep 2021 ~ Feb 2024)

• B.A in Economics in Sogang University (March 2018 ~ Feb 2024, Top 0.6% scorer in Korean CSAT)

Software/Tools

• RocksDB, CacheLib, Solana, ZenFS, TorFS, Linux Kernel I/O Stack (VFS ,F2FS, Block Layer, NVMe driver, Memory Management), Cosmos OpenSSD, FEMU, Filebench, YCSB, Fio, C, C++, Python, Rust

Experiences

1.  Soldier in Republic of Korea Army (Sep 2018 ~ May 2020)

2.  Administrative Staff in LG U+ (Aug 2020 ~ July 2021)

3.  Student Researcher (Apr 2022 ~ now)

4.  Operating System TA (Fall 2024)

5.  System Programming TA (Spring 2025)

Languages

1. Korean : Native

2. English : Intermediate (iBT TOEFL 94/120)

3. Japanese : Middle school student (JLPT N1 132/180)

4. Chinese : Real Beginner (Challenging for HSK level 4)

General Interests. 

1. English Rock (Oasis, Muse, Radiohead, RHCP, The Strokes, Turnstile, Paramore and more)

2. Japanese Rock (Minami, Zutomayo, Sheena Ringo, Aimyon, Yorushika, Ellegarden and more)

3. K-Rock (The Black Skirt, Jaurim and more)

4. Major League Baseball (LA Dodgers, Shohei Ohtani and Yamamoto Yoshinobu)

5. Stargazing