Professor

 
 

Youjip Won

ICT Endowed Chair Professor
Director, Center for File and Storage Systems Research
Dept of Electrical Engineering, KAIST

PhD Students

Joontaek Oh

Joontaek Oh is a PhD Student at Department of Electrical Engineering, KAIST. He is a member of Operating System Laboratory. His research interests are File system and Storage. He is researching the improvement of F2FS and EXT4.

Publications

  • [USENIX FAST] Joontaek Oh, Seung Won Yoo, Hojin Nam, Changwoo Min and Youjip Won, “CJFS : Concurrent Journaling for Better Scalability”, In Proc. of USENIX Conference on File and Storage Technologies (FAST) 2023, Feb, 20-23, 2022
  • [USENIX FAST] Juwon Kim, Minsu Jang, Danish Muhammad Teeshen, Joontaek Oh, and Youjip Won “IPLFS: Log-Structured File System without Garbage Collection“, In Proc. of USENIX Annual Technical Conference (ATC) 2022, July. 11-13, 2022
  • [ACM SYSTOR] Seung Won Yoo, Joontaek Oh, and Youjip Won “O-AFA: Order Preserving All Flash Array“, in Proc. of The ACM International Systems and Storage Conference (SYSTOR), Haifa, Israel, June. 13-15, 2022
  • [USENIX FAST] Dohyun Kim, Kwangwon Min, Joontaek Oh, and Youjip Won “ScaleXFS: Getting scalability of XFS back on the ring“, In Proc. of USENIX Conference on File and Storage Technologies (FAST) 2022, Feb, 22-24, 2022
  • [USENIX FAST] Joontaek Oh, Sion Ji, Yongjin Kim, and Youjip Won, “exF2FS: Transaction Support in Log-Structured Filesystem“, In Proc. of USENIX Conference on File and Storage Technologies (FAST) 2022, Feb, 22-24, 2022
  • [ACM ApSys] Kyoungho Koo, Joontake Oh, Kwangwon Min, Youngjin Kwon and Youjip Won “C2J: Compulsory Compound Transaction for Journaling Filesystem”, in Proc. of ACM SIGOPS Asia-Pacific Workshop on Systems (APSys) 2021, online, Aug. 24-25, 2021
  • [ACM ICSSS] Myeongseon Kim, Joontaek Oh, Youjip won, “Barrier enabled QEMU”, In Proc. of ICISS 2019, Tokyo, Japan, Mar. 2019
  • [IEEE NVMSA] Joontaek Oh, and Youjip Won. “Embedded DBMS Design for In-Vehicle Information Management.” 2018 IEEE 7th Non-Volatile Memory Systems and Applications Symposium (NVMSA). IEEE, 2018.
  • [ACM TOS] Youjip Won, Joontaek Oh, Jaemin Jung, Gyeongyeol Choi, Seongbae Son, Jooyoung Hwang, Sangyeun Cho “Bringing Order to Chaos: Barrier-Enabled I/O Stack for Flash Storage”, ACM Transactions on Storage (TOS)
  • [ACM TOS] Jinsoo Yoo, Joontaek Oh, Seongjin Lee, Youjip Won, Jin-Yong Ha, Jongsung Lee, Junseok Shim, “OrcFS: Orchestrated File System for Flash Storage”, ACM Transactions on Storage (TOS), Vol. 14, Issue 2, Apr, 2018
  • [USENIX FAST] Youjip Won, Jaemin Jung, Gyeongyeol Choi, Joontaek Oh, Seongbae Son, Jooyoung Hwang, Sangyeun Cho “Barrier Enabled IO Stack for Flash Storage”, in proc. of USENIX Conference on File and Storage Technologies (FAST), Oakland, CA, USA, Feb. 12-15, 2018 (Awarded Best Paper)
  • [USENIX FAST WiP] Jinsoo Yoo, Joontaek Oh, and Youjip Won, “Preserving Bi-Modal Utilization for Segment Cleaning in Modern Log-structured Filesystem”, In Proceedings of the 14th USENIX Conference on File and Storage Technologies (FAST), Work-In-Progress, Santa Clara, CA, Feb 22-25, 2016
  • [한국정보과학회 동계학술발표대회] 오준택, 원유집, “리눅스 I/O Throttling 기법에 의한 사용자 스기 요청의 지연시간 증가 현상 분석”, 한국정보과학회, 2016 동계학술발표회 (WC 2016), 2016년 12월 17 – 12월 19일, 휘닉스파크, 강원도
  • [한국정보과학회 한국소프트웨어종합학술대회] 오준택, 원유집, “SQLite를 위한 데이터베이스 파일 기반의 멀티 데이터베이스 트랜잭션“, 한국정보과학회, 2018 한국소프트웨어종합학술대회 (KSC 2018), 2018년 12월 19일 – 12월 21일, 평창 휘닉스 파크

Muhammad Danish Tehseen

Muhammad Danish Tehseen is a MS leading to PhD Integrated student at Department of Electronical and Electronics Engineering. He is a member of Operating System Lab at KAIST.

Publications

Jieun Kim

Jieun Kim is a MS leading to PhD intergrated student at Department of Electrical Engineering, KAIST. She is a member of Operating system laboratory. Her research interests are computer vision and Embedded System.

Publications

Kyoungho Koo

Kyoungho Koo is a PhD student at Department of Electrical Engineering, KAIST. He is a member of Operating System Laboratory. His research interests are Micro-Controller Operation System and Visual system.

Publications

  • [IEEE NVMSA] Kyoungho Koo, Yongjun Park, Youjip Won, “LOCKED-Free Journaling: Improving the Coalescing Degree in EXT4 Journaling”, in Proc. of  IEEE Non-Volatile Memory Systems and Applications Symposium (NVMSA) 2020, Sokcho, Korea, Aug. 19-21, 2020
  • [WDCS] 구경호, 이원종, 오준택, 박영준, 원유집, “트랜잭션 블록 삽입 대기로 발생하는 저널링의 성능저하와 최적화 방안” 한국정보과학회, 2019 정보보안 및 고신뢰컴퓨팅 하계워크샵 (WDCS 2019), 2019년 8월 12 – 8월 14일, 제주대학교 아라컨벤션홀, 제주
  • [ACM APSYS] Kyoungho Koo, Joontake Oh, Kwangwon Min, Youngjin Kwon and Youjip Won “C2J: Compulsory Compound Transaction for Journaling Filesystem”, in Proc. of ACM SIGOPS Asia-Pacific Workshop on Systems (APSys) 2021, online, Aug. 24-25, 2021
김도현

Dohyun Kim

Dohyun Kim is a PhD student at Department of Electrical Engineering, KAIST. He is a member of Operating system laboratory. His research interests are File system and OS kernel.

Publications

Junhan Lee

Junhan Lee is a PhD student at Department of Electrical Engineering, KAIST. He is a member of Operating System Laboratory. His research interests is Linux kernel.

Publications

SeungWon Yoo

Seung Won Yoo is MS student at Department of Electrical Engineering, KAIST. He is a member of Operating System Laboratory. His research interests is Linux Kernel.

Publications

  • [USENIX FAST] Joontaek Oh, Seung Won Yoo, Hojin Nam, Changwoo Min and Youjip Won, “CJFS : Concurrent Journaling for Better Scalability”, In Proc. of USENIX Conference on File and Storage Technologies (FAST) 2023, Feb, 20-23, 2023
  • [ACM SYSTOR] Seung Won Yoo, Joontaek Oh, and Youjip Won “O-AFA: Order Preserving All Flash Array”, in Proc. of The ACM International Systems and Storage Conference (SYSTOR), Haifa, Israel, June. 13-15, 2022

Juwon Kim

Juwon Kim is MS student at Department of Electrical Engineering, KAIST. He is a member of Operating System Laboratory. His research interest is Filesystem.

Publications

MS Students

Suik Park

Suik Park is MS student at Department of Electrical Engineering, KAIST. He is a member of Operating System Laboratory. His research interest is OS kernel.

Publications

JuHyeon Jang

JuHyeon Jang is MS Student at Department of Electrical Engineering, KAIST. He is a member of Operating System Laboratory. His research interests are OS Kernel

Publications

Dongeon Kim

Dongeon Kim is MS student at Department of Electrical Engineering, KAIST. He is a member of Operating System Laboratory. His research interest are OS Kernel.

Publications

Chaeyoung Hwang

Chaeyoung Hwang is a MS student at Department of Electrical Engineering, KAIST. She is a member of Operating Systems Laboratory. Her research interests are OS kernel and system design.

Publications

Sukjoon Oh

Sukjoon Oh is MS student at Department of Electrical Engineering, KAIST. He is a member of Operating system laboratory. His research interest is Linux kernel .

Publications

Seungho Lim

Seungho Lim is MS student at Department of Electrical Engineering, KAIST. He is a member of Operating system laboratory. His research interest is Linux kernel .

Publications

Byeonghyeon Choi

Byeonghyeon Choi is MS student at Department of Electrical Engineering, KAIST. He is a member of Operating system laboratory. His research interest is OS kernel.

Publications

Seungjae Lee

Seungjae Lee is MS student at Department of Electrical Engineering, KAIST. He is a member of Operating system laboratory. His research interest is OS kernel.

Publications

Alumni

  • 장민수(Jang, Minsu), 셀렉트스타, 2022
  • 민광원(Min, Kwangwon), 삼성전자, 2022
  • 김용진(Kim, Yongjin), LG CTO, 2022
  • 남호진(Nam, Hojin), 삼성전자, 2022
  • 지시온(Ji, Sion),삼성전자,2022
  • 박정안(Park,JeoungAhn),,2022
  • 이도근(Lee, Dokeun), SK hynix, 2021
  • 황태호(Hwang, Taeho), SK hynix, 2020
  • 김형준(Kim, Hyungjun), (주)윈스, 2020
  • 김명선(Kim, Myeongseon), LG CTO, 2020
  • 이원종(Lee, Wonjong), 삼성전자, 2020
  • 김선두(Kim, Sundoo), LG CTO, 2019
  • 조정우(Jo, Jungwoo), Exem, 2019
  • 윤주성(Yun, Juseong), (주)코비전, 2019
  • 유진수(Yoo, Jinsoo) , 삼성전자, 2018
  • 조민재(Cho, Minjae) ,(주) 우아한형제들 , ,
  • 김선녕(Kim, Sunyoung) , , ,
  • 최경열(Choi, Gyeongyeol), TMaxSoft, 2017
  • 노연진(Noh, Yeonjin), LG CTO, 2017
  • 손성배(Son, Seongbae), HP, 2017
  • 김지현(Kim, Jihyun), 신세계, 2017
  • 이성진(Lee, Seongjin), 경상대학교, 2016
  • 천승용(Cheon, Seungyong), LG CTO, 2016
  • 손한근(Son, Hankeun ), SK Hynix, 2016
  • 유밝은(Yoo, Balgeun), LG CTO, 2016
  • 정재민(Jung, Jaemin), Samsung MSL, 2016
  • 이성수(Lee, Seongsu), LG CTO, 2016
  • Dam Quang Tuan,Vietnam National Univ, 2016
  • 이건우(Lee, Keonwoo), Future Systems, 2016
  • 임은령(Lim, Eunryoung),네이버 랩스, 2016
  • 이원건(Lee, Onegun), 삼성전자, 2016
  • 김명식(Kim, Myungsik), 삼성전자, 2016
  • 이철희(Lee, Choelhee), 아리온 테크놀로지, 2015
  • 박찬현(Park, Chanhyun), SK hynix, 2015
  • 박동일(Park, Dongil), 삼성전자, 2015
  • 임경렬(Lim, Kyeongyeol),고영테크놀러지, 2015
  • 김준엽(Kim, Junyeop), 티맥스데이터, 2015
  • 김규일(Kim, Kyuil), LG CTO, 2014
  • 정수만(Jeong, Sooman), 삼성전자, 2014
  • 이기성(Lee, Kisung), 삼성전자, 2013
  • 신진철(Shin, Jinchul), SK Planet, 2013
  • 김재운(Kim, Jaewoon), , 2013
  • 정창훈(Jeong, Changhun),티맥스데이터, 2013
  • 조석희(Cho, Seokhei), LG CTO, 2013
  • 김종민(Gim, Jongmin),Samsung MSL, 2012
  • 김해성(Kim, Haesung), LG CTO, 2012
  • 홍성우(Hong, Sungwoo), , 2011
  • 唐 智(Tang Zhi),중국 Zhejiang시 금감원 , 2011
  • 김주현(Kim, Joohyun), 삼성전자, 2011
  • 이철목(Lee, Chulmok),삼성전자, 2011
  • 구자진(Koo, Jajin), 이오테크닉스, 2011
  • 전태종(Quan, TaiZhong),중국산업은행, 2011
  • 윤대영(Yoon, Daeyoung),교대역 소재 감리회사, 2011
  • Dashdorj Yamkhin, Mongolia Univ. of Science and Technology,2010
  • 최정헌(Choi, JeongHeon),Self-employeed, 2010
  • 이광호(Lee, Kwangho), 삼성전자, 2010
  • 여해동(Yeo, Dylan), 삼성전자,2010
  • 김요환(Kim, Yohwan), LG전자, 2009
  • 박진희(Park, Jinhee), 삼성전자, 2009
  • 최민석(Choi, Minseok), 매크로 임팩트(주), 2009
  • 신형종(Shin, Hyungjong), 삼성전자, 2008
  • 장재혁(Chang, Jaehyeok), 네이버, 2008
  • 조성호(Cho, Sungho), , 2008
  • 한석희(Han, SeokHee), LG CTO, 2008
  • 민재홍(Min, Jaehong),삼성전자 ,2008
  • 반종명(Ban, Jong-Myeong), 삼성전자 , 2008
  • 전병길(Jeon, Byunggil), 삼성전자 , 2007
  • 김은기(Kim, Eunki), 삼성전자 , 2007
  • 김락기(Kim, Rak-ki), 삼성전자 , 2007
  • 김영진(Kim,Youngjin), 네이버, 2007
  • 박동주(Park, Dongju), Kakao, 2007
  • 박재석(Park, Jaeseok), 삼성전자, 2007
  • 이모원(Lee, Mowon),Naver, 2007
  • 이주훤(Lee, Juhwon), (주)만도, 2007
  • 정형원(Jung, Hyungwon),삼성전자 , 2007
  • 정원민(Jung, Wonmin),LG CTO , 2007
  • 한영수(Han, Youngsoo), 삼성전자, 2006
  • 노승현(Noh, Seunghyun),Phantom AI, 2006
  • 류재민(Ryu, Jaemin), 삼성전자, 2006
  • 고영준(Goh, Youngun),태민시스템, 2006
  • 이시창(Lee, Sichang), 삼성 S1, 2006
  • 한영수(Han, Youngsoo), 삼성전자, 2006
  • 방창대(Bang, Changdae), , ,
  • 강성주(Kang, Sungjoo), ETRI, 2005
  • 김재한(Kim, Jaehan), , 2005
  • 윤영성(Yun, Youngsung), 삼성전자, 2005
  • 김효준(Kim, Hyojun), Google, 2005
  • 장인광(Jang Ingwang), 삼성전자, 2005
  • 장형규(Jang, Hyeonggyu),CTRing, 2005
  • 김두한(Kim, Duhan), 삼성전자, 2004
  • 강광석(Gang, Gwangseok), 삼성전자, 2004
  • 천지원(Chen, Jiwon), 삼성전자, 2004
  • 송동현(Song, Donghyun), 삼성전자, 2004
  • 이용만(Lee, Youngman), KOTBA, 2004
  • 김진용(Kim, Jinyong), Univ. of Texas at Dallas, 2004
  • 양승헌(Yang, Seunhyun), 넥슨코리아, 2004
  • 최정완(Choi, Jungwan), LG 전자 MC연구소, 2003
  • 송승호(Song, Seungho), 삼성전자,2003
  • 심보욱(Shim, Bouk),LG전자, 2002
  • 오창영(Oh, Changyoung), Reakosys, 2002
  • 차승일(Cha, Seungil), TG삼보컴퓨터, 2002
  • 백국실(Baek, Guksil), Nexdigm, 2002
  • 박진연(Park, Jinyeon),LG전자,2002
  • 김범은(Kim, Beopeun), 삼성전자, 2002
  • 조경선(Cho, Kyungsun), 삼성전자, 2001

Collaborators

Jongmoo Choi

Jongmoo Choi is an Associate Professor at School of Computer Science and Engineering, Dankook University, Korea. He received the BS degree in oceanography from Seoul National University, Korea, in 1993 and the MS and PhD degrees in computer engineering from Seoul National University in 1995 and 2001, respectively. His research interests include file systems, flash memory, embedded systems, and virtualization technology.

Homepage: http://embedded.dankook.ac.kr/~choijm/

Jeongseok Ha

Jeongseok Ha is currently an Associate Professor of Electrical Engineering at KAIST. He received 2003 Ph. D. in Electrical and Computer Engineering, Georgia Institute of Technology, U.S.A. His research interests include Rate-adaptive channel coding, Channel coding for storages and communication systems, Channel codes defined on graphs such as low-density-parity-check(LDPC) codes, Tornado codes, Turbo codes, Information theorical security: Wiretap channel.

Homepage: http://ccit.kaist.ac.kr/

Kangyoon Lee

Kangyoon Lee is an Associate Professor of Department of Electronics Engineering, SungKyunKwan University. He received the B.S., M.S. and Ph.D. degrees in the School of Electrical Engineering from Seoul National University, Seoul, Korea, in 1996,1998, and 2003, respectively. His research interests include implementation of CMOS RF transceiver, analog integrated circuits, and analog/digital mixed-mode VLSI system design.

Homepage: http://www.iclab.co.kr/

Jaekyun Moon

Jaekyun Moon is a Professor of Electrical Engineering at KAIST. Prof. Moon received a BSEE degree with high honor from Stony Brook University and M.S. and Ph.D. degrees in Electrical and Computer Engineering at Carnegie Mellon University. Prof. Moon’s research interests are in the area of channel characterization, signal processing and coding for data storage and digital communication. He also worked as Chief Technology Officer at Link-A-Media Devices Corp. in 2008. He is an IEEE Fellow.

Homepage: http://comstolab.kaist.ac.kr/

Incheol Park

Incheol Park is a Professor in the Department of Electrical Engineering and Computer Science at KAIST. He received the B.S. degree in Electronics Engineering from Seoul National University in 1986, the M.S. and Ph.D. degrees in Electrical Engineering from Korea Advanced Institute of Science and Technology(KAIST) in 1988 and 1992, respectively. His current research interests include CAD algorithms for high-level synthesis and VLSI architectures for general-purpose microprocessors. He is a senior member of the IEEE.

Homepage: http://ics.kaist.ac.kr/

Yeonseung Ryu

Yeonseung Ryu is an Associate Professor at Department of Computer Software, Myongji University, Korea. He received his BS, MS and Ph.D in the Dept. of Computer Science and Statistics, Seoul National University, Korea. His research interests include Operating Systems, Storage Systems, Multimedia Systems, and Network Systems.

Homepage: http://syso.mju.ac.kr/

Ilhoon Shin

Ilhoon Shin is a Professor in the Department of Electrical Engineering and Computer Science at KAIST. He received the B.S. degree in Electronics Engineering from Seoul National University in 1986, the M.S. and Ph.D. degrees in Electrical Engineering from Korea Advanced Institute of Science and Technology(KAIST) in 1988 and 1992, respectively. His current research interests include CAD algorithms for high-level synthesis and VLSI architectures for general-purpose microprocessors. He is a senior member of the IEEE.

Homepage: http://blue.snut.ac.kr/~ihshin/

Sungroh Yoon

Sungroh Yoon is an Assistant Professor of Electrical Engineering at Seoul University, Seoul, Korea. His research interests include high-performance solid-state drive (SSD) architecture based on NAND flash and other emerging non-volatile memory devices. He is also interested in SSD-based energy- efficient system design and biocomputation.

Homepage: http://acl.korea.ac.kr/