Professor

Youjip Won   

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

PhD Students

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

  • [ACM HotStorage] Jieun Kim, Dohyun Kim and Youjip Won, “Fair I/O Scheduler for Alleviating Read/Write Interference by  Forced Unit Access in Flash Memory”, In Proc. of ACM HotStorage’22, Virtual, June. 27-28, 2022
  • [KIISE 논문지] 김지은, 유승원, 원유집 “현대 입출력 스택에서 쓰기 순서 효율적 보장에 대한 고찰” 정보과학회 논문지, 제43권, 제3호, 2025년 3월, pp.27-35
  • [USENIX FAST] Jieun Kim, Joontaek Oh, Juwon Kim, Seung Won Yoo, and Youjip Won, “OPIMQ: Order Preserving IO stack for Multi-Queue Block Device“, In Proc. of USENIX Conference on File and Storage Technologies (FAST) 2025, Feb, 25-27, 2025
  • Jieun Kim, Dohyun Kim, Minki Kang, and Youjip Won, “Storage IO Characterization in Autonomous Driving System”, IEEE Transactions on Intelligent Vehicles, In submission
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

Juwon Kim

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

Publications

  • [USENIX FAST] Juwon Kim, Seungjae Lee, Joontaek Oh, Dongkun Shin, and Youjip Won, “D2FS: Device-Driven Filesystem Garbage Collection”, In Proc. of USENIX Conference on File and Storage Technologies (FAST) 2025, Feb. 25-27, 2025
  • [USENIX FAST] Jieun Kim, Joontaek Oh, Juwon Kim, Seung Won Yoo, and Youjip Won, “OPIMQ: Order Preserving IO stack for Multi-Queue Block Device”, In Proc. of USENIX Conference on File and Storage Technologies (FAST) 2025, Feb. 25-27, 2025
  • [ACM SAC] Juwon Kim, Dongeon Kim, Seung Won Yoo, Myoengin Cheon, Joontaek Oh, and Youjip Won, “lwFSCK: Light-weight Filesystem Check”, ACM Symposium on Applied Computing (SAC) 2025, Mar. 3 – Apr. 4, 2025
  • [USENIX ATC] 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

Seung Won Yoo

Seung Won Yoo is PhD student at Department of Electrical Engineering, KAIST. He is a member of Operating system laboratory. His research interest is Filesystem.

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

Sukjoon Oh

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

Publications

Bonmoo Koo

Bonmoo Koo is PhD student at Department of Electrical Engineering, KAIST. He is a member of Operating system laboratory. His research interest is Storage.

Publications

MS Students

Jihoon Seok

Jihoon Seok is MS student at Department of Electrical Engineering, KAIST. He is a member of Operating system laboratory. His research interest is File system and OS kernel.

Publications

Hyobyung Han

Hyobyung Han is MS student at Department of Electrical Engineering, KAIST. He is a member of Operating system laboratory. His research interest is File system and Storage

Publications

Hwanseok Yoo

Hwanseok Yoo is a MS student at Department of Electrical Engineering, KAIST. He is a member of Operating System Laboratory. His research interests are Filesystem and OS kernel.

Publications

Minki Kang

Minki Kang is a MS student at Department of Electrical Engineering, KAIST. She is a member of Operating System Laboratory. Her research interests are Storage and GPU System.

Publications

Jaewon Lee

Jaewon 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

Whanseok Kim

Whanseok Kim is MS student at Department of Electrical Engineering, KAIST. He is a member of Operating system laboratory. His research interest is File system and Storage.

Publications

Alumni

  • 이승재 (Lee, Seungjae),,2025
  • 오준택 (Oh, Joontaek), University of Wisconsin–Madison, 2024
  • 최병현 (Choi, Byeonghyeon), , 2024
  • 박수익 (Park, Suik), SK Hynix, 2024
  • 김동언 (Kim, Dongeon), Presto Labs, 2024
  • 임승호 (Lim, Seungho), 사회복무요원, 2024
  • 황채영 (Hwang, Chaeyoung), LG CNS, 2024
  • 장주현(Jang, Juhyeon), 삼성전자, 2023
  • 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),SK hynix,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