E-mail ysjoo@kookmin.ac.kr
M.S. Seoul National University (2002)
B.S. Seoul National University (2000)
2018-2024 Associate Professor, School of Computer Science, Kookmin University
2015-2018 Assistant Professor, School of Computer Science, Kookmin University
2010-2015 Research Professor, Ewha Womans University
2009-2010 Postdoctoral Researcher, Pennsylvania State University
2007-2008 Postdoctoral Researcher, Seoul National University
2018-2024 부교수, 국민대학교 컴퓨터공학부
2015-2018 조교수, 국민대학교 컴퓨터공학부
2010-2015 연구교수, 이화여자대학교 컴퓨터공학과
2009-2010 박사후연구원, Pennsylvania State University
2007-2008 박사후연구원, 서울대학교
Research Overview 연구 개요
Our research focuses on building high-performance, energy-efficient, and secure storage systems. We develop I/O completion optimization techniques that dynamically adapt to workload characteristics, achieving both prompt and CPU-efficient storage access on modern SSDs and NVMe devices. Our work spans from firmware-level security (ransomware-proof SSDs) to OS-level optimization (virtualized I/O, application launch acceleration), with results published at top-tier venues including USENIX FAST and ACM HotStorage.
본 연구실은 고성능, 에너지 효율적, 안전한 스토리지 시스템 구축을 목표로 연구하고 있습니다. 워크로드 특성에 동적으로 적응하는 I/O 완료 최적화 기술을 개발하여, 최신 SSD 및 NVMe 장치에서 신속하고 CPU 효율적인 스토리지 접근을 달성합니다. 펌웨어 수준의 보안(랜섬웨어 방지 SSD)부터 OS 수준의 최적화(가상화 I/O, 앱 실행 가속)까지 폭넓은 연구를 수행하며, USENIX FAST, ACM HotStorage 등 최상위 학회에 논문을 게재하고 있습니다.
Research Areas 연구 분야
- I/O Completion Optimization
- Storage Security
- Virtualized I/O Performance
- SSD/NVMe Performance Optimization
- Energy-Efficient Memory Systems
- I/O 완료 최적화
- 스토리지 보안 (랜섬웨어 방어)
- 가상화 I/O 성능 최적화
- SSD/NVMe 성능 최적화
- 에너지 효율적 메모리 시스템
Major Achievements 주요 연구 성과
- Dynamic I/O completion method (DPAS) achieving 9% YCSB improvement on 3D XPoint SSD
- Polled I/O path expansion for Linux virtualization
- Memory-efficient ransomware detection at SSD firmware level
- 28% reduction of application launch time on SSDs (FAST)
- Hybrid PCM/Flash storage architecture for performance-energy-lifetime co-optimization
Honors & Awards 수상
- US Patent 11,768,532 — I/O Latency Tracking for Storage Devices, 2023
- KR Patent 10-2919645 — Hybrid Interrupt Processing, 2026
- US Patent App. 2026/0030187 — I/O Completion Processing, 2026
Recent Publications 주요 논문
- D. Seo, J. Jung, Y. Yoon, P.-X. Chen, Y. Joo, S.-S. Lim, and N. Dutt, "DPAS: A Prompt, Accurate and Safe I/O Completion Method for SSDs," USENIX FAST, 2026
- D. Seo, Y. Joo, and N. Dutt, "Improving Virtualized I/O Performance by Expanding the Polled I/O Path of Linux," ACM HotStorage, pp. 31-37, 2024
- Y. Joo, Y. Yoon, and J. H. Choi, "A Memory-Efficient Overwrite Detection Method for Ransomware-Proof SSDs," IEICE Trans. on Info. and Systems, Vol. 106, Issue 8, 2023
- Y. Joo, D. Seo, D. Shin, and S.-S. Lim, "Enlarging I/O Size for Faster Loading of Mobile Applications," IEEE Embedded Systems Letters, Vol. 12, Issue 2, 2020
- Y. Joo, S. Park, and H. Bahn, "Exploiting I/O Reordering and I/O Interleaving to Improve Application Launch Performance," ACM Trans. on Storage, Vol. 13, Issue 1, 2017
- Y. Joo, J. Ryu, S. Park, and K. G. Shin, "FAST: Quick Application Launch on Solid-State Drives," USENIX FAST, pp. 259-272, 2011
- G. Sun, Y. Joo, Y. Chen, Y. Xie, Y. Chen, and H. Li, "A Hybrid Solid-State Storage Architecture for the Performance, Energy Consumption, and Lifetime Improvement," HPCA, pp. 1-12, 2010
- Y. Joo, J. Ryu, S. Park, H. Shin, and K. G. Shin, "Rapid Prototyping and Evaluation of Intelligence Functions of Active Storage Devices," IEEE Trans. on Computers, Vol. 63, Issue 9, 2014