Members

Professor

Donghee Lee

He received the MS and PhD degrees in computer engineering, both from Seoul National University, Seoul, Korea, in 1991 and 1998, respectively. He is currently an associate professor in the School of Computer Science, University of Seoul, Korea. Previously, he was a senior engineer at Samsung Electronics Company, Korea, in 1998. His research interests include operating systems, high performance I/O systems, flash memory software, and embedded systems.

Ph.D Paper: LRFU (Least Recently/Frequently Used) Replacement Policy

E-mail: dhl_express@uos.ac.kr

See the Publications page for publication list.

Ph.D Students

Hunki Kwon

He is now a Ph.D student in the University of Seoul, Korea. His research interests include operating systems and embedded systems.

E-mail : kwonhunki@uos.ac.kr

International Publications

    • Hunki Kwon, Eunsam Kim, Jongmoo Choi, Donghee Lee, and Sam H. Noh, "Janus-FTL: Finding Optimal Point on the Spectrum between Page and Block Mapping Schemes," Proceedings of the International Conference on Embedded Software (EMSOFT) 2010. Slide

  • Sung-Kwan Kim, Hunki Kwon, Donghee Lee, Sam H. Noh, and Sang Lyul Min, "A Flash-Aware Cluster Allocation Scheme for Legacy File Systems," Journal of Information Science and Engineering(JISE), Vol. 25(4), pp. 1191-1220, 2009.

    • Jongmin Lee, Sunghoon Kim, Hunki Kwon, Choulseung Hyun, Seongjun Ahn, Jongmoo Choi, onghee Lee, and Sam H. Noh, "Block recycling schemes and their cost-based optimization in NAND Flash memory based storage system," ACM Conference on Embedded Systems Software 2007, Oct. 2007.

Domestic Publications

    • 권훈기, 김은삼, 최종무, 이동희, 노삼혁, "참조 패턴에 따라 페이지 및 블록 사상 영역의 크기를 조절하는 Janus-FTL," 정보과학회논문지:컴퓨팅의 실제 및 레터, 제15권 제12호, pp.918~922, 2009/12.

    • 권훈기(Hunki Kwon) · 김은삼(Eunsam Kim) · 최종무(Jongmoo Choi) · 이동희(Donghee Lee) · 노삼혁(Sam H. Noh) 참조 패턴에 따라 페이지 사상 영역과 블록 사상 영역의 크기를 조절하는 Janus-FTL 한국정보과학회 학술발표논문집 한국정보과학회 2009 한국컴퓨터종합학술대회 논문집 제36권 제1호(A), pp. 346-347 (2pages), 2009/6

Patent

    • Hunki Kwon, Eunsam Kim, Jongmoo Choi, Donghee Lee, Sam H. Noh, "VARIABLE SPACE PAGE MAPPING METHOD AND APPARATUS FOR FLASH MEMORY DEVICE", United States Patent Application 20100082886, 2010.04.01

Jaeho Kim

He is now a Ph.D student in the University of Seoul, Korea. His research interests include operating systems and embedded systems.

E-mail : kjhnet@gmail.com (CV)

Webpage: http://kjhnet.blogspot.kr/

International Publications

    • Jaeho Kim, Jongmin Lee, Jongmoo Choi, Donghee Lee, and Sam H. Noh,

      • "Improving SSD Reliability with RAID via Elastic Striping and Anywhere Parity,"

      • The 43rd Annual IEEE/IFIP International Conference on Dependable Systems and Networks, 2013. [Paper][Slide]

    • Jaeho Kim, Jongmin Lee, Jongmoo Choi, Donghee Lee, and Sam H. Noh,

    • "Enhancing SSD Reliability through Efficient RAID Support,"

  • 3rd Asia-Pacific Workshop on Systems (APSYS), 2012.[Paper][Slide]

    • Jaeho Kim, Jongmin Lee, Jongmoo Choi, Donghee Lee, and Sam H. Noh,

    • "DS-RAID: Efficient Parity Update Scheme for SSDs,"

  • USENIX Conference on File and Storage Technology (FAST), poster, 2012 [Poster]

  • Jaeho Kim, Yongseok Oh, Eunsam Kim, Jongmoo Choi, Donghee Lee, and Sam H. Noh, "Disk Schedulers for Solid State Drives," Proceedings of the 9th ACM & IEEE international Conference on Embedded Software, pp. 295-304, Oct. 12-16, 2009.

Domestic Publications

    • 김재호, 이종민, 최종무, 이동희, 노삼혁, "신뢰성 있는 SSD를 위한 효율적인 RAID 기법", 정보과학회논문지 : 컴퓨팅의 실제 및 레터, 제18권, 제5호, 2012/05. [Paper]

    • 김재호, 오용석, 김은삼, 최종무, 이동희, 노삼혁, “SSD(Solid State Drive)에 최적화된 입출력 스케줄러”, 2009 한국컴퓨터종합학술대회 논문집, Vol.36, No 1(A), pp. 356-357.

Yongseok Oh

He is now a Ph.D student in the University of Seoul, Korea. His research interests include file systems and scalable file system indexing.

E-mail : ysoh@uos.ac.kr

Homepage : http://embedded.uos.ac.kr/ysoh

International Publications

    • Yongseok Oh, Jongmoo Choi, Donghee Lee, and Sam H. Noh,

    • "Caching less for better performance: Balancing cache size and update cost of flash memory cache in hybrid storage systems,"

      • Proceedings of the 10th USENIX Conference on File and Storage Technology (FAST), 2012.

      • [PDF] [Slide] [Poster]

    • Yongseok Oh, Eunsam Kim, Jongmoo Choi, Donghee Lee, and Sam H. Noh, "Optimizations of LFS with slack space recycling and lazy indirect block update", Proceedings of the 3rd Annual Haifa Experimental Systems Conference, 2010.

    • Choulseung Hyun, Yongseok Oh, Eunsam Kim, Jongmoo Choi, Donghee Lee, and Sam H. Noh, A Performance Model and File System Space Allocation Scheme for SSDs, Proceedings of the 26th IEEE Symposium on Massive Storage Systems and Technologies (MSST2010), Lake Tahoe, Nevada, May 6-7, 2010.

    • Jaeho Kim, Yongseok Oh, Eunsam Kim, Jongmoo Choi, Donghee Lee, and Sam H. Noh, "Disk Schedulers for Solid State Drives," Proceedings of the 9th ACM & IEEE international Conference on Embedded Software, pp. 295-304, Oct. 12-16, 2009.

Domestic Publications

    • 오용석, 김은삼, 최종무, 이동희, 노삼혁, "LFS의 쓰기 성능 최적화를 위한 세그먼트 공간 재활용 기법," 정보과학회논문지:컴퓨팅의 실제 및 레터, 제 15권 제 12호, pp.963 ~967, 2009.

    • 오용석, 김은삼, 최종무, 이동희, 노삼혁, "세그먼트 공간 재활용 기법을 이용한 LFS의 쓰기 성능 최적화 연구", 한국정보과학회 2009 한국컴퓨터종합학술대회 논문집 제36권 제1호(A), pp. 312~313(2pages), 2009.

    • 김재호, 오용석, 김은삼, 최종무, 이동희, 노삼혁, "SSD(Solid State Drive)에 최적화된 입출력 스케줄러", 한국정보과학회 2009 한국컴퓨터종합학술대회 논문집 제36권 제1호(A), pp. 356~357(2pages), 2009.

Patent

    • Sam H. Noh, Donghee Lee, Jongmoo Choi, Eunsam Kim, Choulseung Hyun and Yongseok Oh, "METHOD AND DEVICE FOR MANAGING SOLID STATE DRIVE", 10-2008-0115607, 2008.11.20

Award

    • The 6th Embedded Software Contest - Silver medal

Minh Sophal

He is now an Ph.D student in the University of Seoul, Korea.

E-mail : phalkhpp@yahoo.com

M.S Student

Eunjae Lee

He is now an MS student in the University of Seoul, Korea.

E-mail : kckjn97@gmail.com

Huijin Park

He is now an Undergraduate Student and MS student in the University of Seoul, Korea.

E-mail : bakhi_@hanmail.net

Alumni Ph.D

Alumni MS