Sogang University (Youngjae Kim)

Youngjae Kim (PhD)

Professor, CSE, Sogang University, Seoul, Republic of Korea

Director, BK21 FOUR Program for World-Class, Practice-Oriented Big Data Convergence Talent Development (Sep. 2020–Present)

Co-Director: DISCOS (Data-IntenSive AI COmputing and Systems Laboratory)

Office: AS911, 35 Baekbeom-ro, Mapo-gu, Seoul, Republic of Korea, 04107

Tel: +82-2-705-8933, E-mail: youkim.AT.sogang.ac.kr

Research Interest

Knowledge Graph-Augmented Agentic AI Systems and RAG Systems

LLM Serving Systems, Efficient LLM Inference, Distributed LLM Serving, and Deep Learning Training Systems

Cloud AI Infrastructure, Distributed and Heterogeneous Resource Management, and AI Resource Orchestration

Storage Systems, NVMe and CXL Systems, Key-Value SSDs, Computational Storage, and Memory Systems

Education

Ph.D. in Computer Science and Engineering, The Pennsylvania State University, University Park, PA, USA, 2024–2009. (Advisor: Prof. Anand Sivasubramaniam)

M.S. in Computer Science, KAIST, Korea, 2021–2003. (Emeritus Prof. Seungryoul Maeng)

B.S. with honors in Computer Science, Sogang University, Korea, 1995-2001. (Military Service: Republic of Korea Army, 1996–1998)

Industry Appointment, Leadership & Research/Academic Experience

R&D Staff Scientist, Oak Ridge Leadership Computing Facility (OLCF), U.S. Department of Energy’s Oak Ridge National Laboratory (ORNL), TN, USA, 2009–2015
Technical Advisor, Global Quality & Reliability Assurance, SK hynix, April 2025–Sept 2026

Technical Advisor, Memory System Research, SK hynix, July 2022–June 2023

Department Chair, Computer Science & Engr., Sogang University, 2023–2025

Adjunct Professor, School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA, 2011–2014

Faculty Affiliate, The University of Tennessee, Knoxville, TN, USA, 2011–2015

Assistant Professor, Department of Computer Engineering, Ajou University, Suwon, Korea, 2015–2016

Research Engineer, Embedded OS Team, Embedded Software Center, Electronics and Telecommunications Research Institute (ETRI), Daejeon, Korea, 2003–2004

Highlights

Selected Publications: P-Append (Middleware 2026), SurrogateKV (EMNLP 2026 Findings), OASIS (SC 2026), AegisKV (CIKM 2026), DUAL-BLADE (ICDCS 2026), ColdMap (ICS 2026), PAVE (MASCOTS 2026), LLM-Pilot (CCGRID 2026), KVAccel (IPDPS 2025), FlexLLM (MASCOTS 2025), OpenCXD (MASCOTS 2025), DedupKV (ICS 2025), MemBridge (CCGRID 2025), DeepVM (CCGRID 2024), BandSlim (ICPP 2024), IterKVSSD (SYSTOR 2023), DeNOVA (IPDPS 2022), DiskShield (ASIACCS 2020), Scale-F2FS (SYSTOR 2019), iLSM-SSD (MASCOTS 2019), OBJ-Profile (SC 2017), TagIt (SC 2017), AnalyzeThis (SC 2015), LADS (FAST 2015), OLCF-PFS (SC 2014), Active Flash (FAST 2013), D-Factor (SIGMETRICS 2012), NVMalloc (IPDPS 2012), Burst Buffer (ICDCS 2011), HybridStore (MASCOTS 2011), FP-Manycore (SC 2010), DFTL (ASPLOS 2009), ThermoStat (HPCA 2007), Thermo-RAID (HPCA 2006)
Paper Awards & Honors: BucketLSM (CCGrid 2026, Best Student Paper Nominee Award); ByteExpress (HotStorage 2025, Best Paper Award), Iso-KVSSD (HotStorage 2021, Best Paper Nominee), Amoeba (CAL 2018, Best Paper Award), PGC-SSD (ISPASS 2011, Best Paper Nominee), ThermoStat (HPCA 2007, Best Paper Nominee)

Efficient and Scalable AI Systems & Cloud Infrastructure (LLM Serving, KV Cache Management & Compression, Model/Prompt Optimization, Distributed Training, Checkpointing, and Cloud Resource Optimization)

[AI-NLP] Junwon Kim, Junghyun Ryu, Farid Talibli, Jungmin So, Youngjae Kim, SurrogateKV: Representation-Preserving KV Cache Compression for Long-Context LLMs, Findings of the Association for Computational Linguistics: EMNLP (EMNLP Findings), 2026
[AI-LLM, CLOUD, OS] Kihyun Kim, Seong Jang, Min Heo, Jinwoo Kim, James J. Kim, Youngjae Kim, AegisKV: Runtime Headroom Control for Online LLM Serving via Adaptive Attention Offloading, ACM Conference on Knowledge and Information Management (CIKM), 2026
[AI-LLM, OS] Seong Jang, Kihyun Kim, Jinwoo Kim, Min Heo, Dong Li, Youngjae Kim, PAVE: Partial KV Cache Eviction for Fine-Grained KV Reclamation in LLM Serving, IEEE Int'l Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS), 2026
[AI-LLM, OS] Bodon Jeong, Hongsu Byun, Youngjae Kim, Weikuan Yu, Kyungkeun Lee, Jihoon Yang, Sungyong Park, DUAL-BLADE: Dual-Path NVMe-Direct KV-Cache Offloading for Edge LLM Inference, IEEE International Conference on Distributed Computing Systems (ICDCS), 2026
[AI-LLM, CLOUD] Jinwoo Kim, Kihyun Kim, Hyunsun Chung, Jihoon Yang, James J. Kim, Dong Li, Youngjae Kim, LLM-Pilot: SLO-Aware and Cost-Efficient LLM Serving on Public Cloud VM Clusters via Offloading, IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGRID), 2026
[AI-LLM-RAG, CLOUD] Kihwan Kim, Hyungsun Yoo, Woojung Kim, Donghyun Min, Myungcheol Lee, Jihoon Yang, Weikuan Yu, Youngjae Kim, VEX: Scaling HNSW-Based Vector Search with DPU Memory and Parallelism, IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGRID), 2026
[Cloud] Kyuli Park, Sungmin Yoon, Awais Khan, Sungyong Park, Youngjae Kim, CODA: Breaking CPU Bottlenecks for Scalable Ceph with DPU-Based OSD Decoupling, IEEE International Conference on Cloud Computing (CLOUD), 2026
[AI-LLM, Cloud, OS] Kihyun Kim, Jinwoo Kim, Hyunsun Chung, Myung-Hoon Cha, Hong-Yeon Kim, Youngjae Kim, Cost-Efficient VM Selection for Cloud-Based LLM Inference with KV Cache Offloading, IEEE International Conference on Cloud Computing (CLOUD), 2025
[AI-LLM, RAG] Hyungwoo Lee, Kihyun Kim, Jinwoo Kim, Jungmin So, Myung-Hoon Cha, Hong-Yeon Kim, James J. Kim, Youngjae Kim, Disk-Based Shared KV Cache Management for Fast Inference in Multi-Instance LLM RAG Systems, IEEE International Conference on Cloud Computing (CLOUD), 2025
[AI-LLM, Cloud] Kihyun Kim, Jinwoo Kim, James J. Kim, Dong Li, Youngjae Kim, FlexLLM: Flexible and Cost-Efficient LLM Serving with Heterogeneous GPUs, IEEE Int'l Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS), 2025
[AI-GNN, Cloud] Yoochan Kim, Hong-Yeon Kim, Weikuan Yu, Youngjae Kim, MemoryBridge: Leveraging Cloud Resource Characteristics for Cost-Efficient Disk-based GNN Training via Two-Level Architecture, IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGRID), 2025
[AI-CNN, Cloud] Yoochan Kim, Kihyun Kim, Yonghyeon Cho, Jinwoo Kim, Awais Khan, Ki-Dong Kang, Baik-Song An, Myung-Hoon Cha, Hong-Yeon Kim, Youngjae Kim, DeepVM: Integrating Spot and On-Demand VMs for Cost-Efficient Deep Learning Clusters in the Cloud, IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGRID), 2024
[Cloud, OS] Yeohyeon Park, Junhyeok Park, Awais Khan, Jungwhan Park, Chang-Gyu Lee, Woosuk Chung, Youngjae Kim, OctoKV: An Agile Network-based Key-Value Storage System with Robust Load Orchestration, IEEE Int'l Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS), 2023
[Cloud] Prince Hamandawana, Awais Khan, Chang-Gyu Lee, Sungyong Park, Youngjae Kim, Crocus: Enabling Computing Resource Orchestration for Inline Cluster-wide Deduplication on Scalable Storage Systems, IEEE Transactions on Parallel and Distributed Systems (TPDS), 2020
[Cloud] Awais Khan, Chang-Gyu Lee, Prince Hamandawana, Sungyong Park, Youngjae Kim, A Robust Fault-Tolerant and Scalable Cluster-wide Deduplication for Shared-Nothing Storage Systems, IEEE Int'l Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS), 2018
[Cloud, Big Data] Seung-Hwan Lim, Jae-Seok Huh, Youngjae Kim, Galen M. Shipman, Chita Das, D-Factor: A Quantitative Model of Application Slow-Down in Shared Service Systems with Multiple Resources, ACM Int'l Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), 2012
[Cloud, Big Data] Seung-Hwan. Lim, Jae-Seok. Huh, Youngjae Kim, Chita Das, Migration, Assignment, and Scheduling of Jobs in Virtualized Environment, USENIX Workshop on Hot Topics in Cloud Computing (HotCloud), 2011

Graph Neural Network Training System

Cost-Efficient LLM Serving on AWS

Knowledge-Enhanced AI and Data Systems (Knowledge Graphs, Machine Learning, Vector Retrieval, RAG, Agentic AI)

[ML] J. Kang, et al, QFuse: Preserving Precise Queryability in Knowledge Graphs over Structured and Unstructured Data, submitted to CIKM Workshop
[ML] 계층적 클래스 인식 디퓨전 모델 기반 불균형 금융 테이블 데이터 합성 연구, 최현기, 김영재, 정보과학회 논문지 (9월 게재예정)
[ML] SymbolicRAG: 추상 구문 트리 기반 구조 인지형 검색증강생성을 활용한 수학 단답형 자동채점 (SymbolicRAG: AST-Based Structure-Aware RAG for Automated Mathematical Short-Answer Grading), 권재우, 김영재, 한국소프트웨어종합학술대회 (KSC2025), 여수엑스포컨벤션센터, 2025년 12월 16일-19일 - 한국정보과학회.
[ML] Speculative RAG의 효율적 초안 생성을 위한 다중 클러스터링과 유사도 기반 샘플링 기법 (Multi-Clustering and Similarity-based Sampling for Efficient Draft Generation in Speculative RAG), 안규원, 김영재, 한국소프트웨어종합학술대회 (KSC2025), 여수엑스포컨벤션센터, 2025년 12월 16일-19일 - 한국정보과학회.
[ML] 멀티태스크 LLM 기반 정책 반영 여부 예측 성능 향상을 위한 랜덤포레스트 활용에 관한 연구 (Multi-task LLM-based Method for Policy Adoption Prediction with Random Forest), 이동섭, 김영재, 한국컴퓨터종합학술대회(KCC2025), 제주국제컨벤션센터(ICC 제주), 2025년 7월 2일-4일.

Data-Centric HPC Architectures and Big Data Analytics Systems (Distributed Analytics, Scientific Data Management, Data Movement, Storage-Side Computing, Resource Orchestration, and HPC/Cloud Infrastructure)
*DS: Distributed System

[HPC, Big Data, DS] Soon Hwang, Junhyeok Park, Junghyun Ryu, Seonghoon Ahn, Jeongahn Park, Jeongjin Lee, Jinna Yang, Soonyeal Yang, Jungki Noh, Qing Zeng, Woosuk Chung, Hoshik Kim, Youngjae Kim, OASIS: Object-based Analytics Storage for Multi-layer SQL Offloading in Scientific Tabular Workloads, ACM/IEEE International Conference on High Performance Computing, Networking, Storage and Analysis (SC), 2026
[HPC, Big Data, DS] Soon Hwang, Jungki Noh, Woosuk Chung, Youngjae Kim, Scout-and-Reduce: Budget-Aware Storage-Side Reduction for Memory-Safe GPU Analytics, International Conference on Massive Storage Systems and Technology (MSST), 2026
[HPC, Big Data, DS] Inhyuk Park, Qing Zeng, Dominic Manno, Soonyeoal Yang, Jason Lee, David Bonnie, Bradley Settlemyer, Youngjae Kim, Woosuk Chung, Gray Grider, KV-CSD: A Hardware-Accelerated Key-Value Store for Data-Intensive Applications, IEEE International Conference on Cluster Computing (CLUSTER), 2023
[HPC, Big Data, DS] Hyogi Sim, Awais Khan, Sudharshan Vazhkudai, Seung-Hwan Lim, Ali Butt, Youngjae Kim, An Integrated Indexing and Search Service for Distributed File Systems, IEEE Transactions on Parallel and Distributed Systems (TPDS), 2020
[HPC, Big Data, DS] Awais Khan, Taeuk Kim, Hyunki Byun, Youngjae Kim, SCISPACE: A Scientific Collaboration Workspace for GeoDistributed HPC Data Centers, Future Generation Computer Systems (FGCS), 2019
[HPC, Big Data, DS] Youngjae Kim, Scott Atchley, Geoffroy R. Vallée, Sangken Lee, Galen M. Shipman, Optimizing End-to-End Big Data Transfers over Terabits Network Infrastructure, IEEE Transactions on Parallel and Distributed Systems (TPDS), 2017
[HPC, Big Data, DB, DS] Hyogi Sim, Youngjae Kim, Sudharshan Vazhkudai, Geoffroy R. Valle ́e, Seung-Hwan Lim, Ali Butt, TagIt: An Integrated Search and Discovery Service for File Systems, ACM/IEEE International Conference on High Performance Computing, Networking, Storage and Analysis (SC), 2017
[HPC, OS] Xu Ji, Chao Wang, Nosayba El-Sayed, Xiaosong Ma, Youngjae Kim, Sudharshan S. Vazhkudai, Wei Xue, Daniel Sanchez, Understanding Object-level Memory Access Patterns Across the Spectrum, ACM/IEEE International Conference on High Performance Computing, Networking, Storage and Analysis (SC), 2017
[HPC, Big Data, DB, DS] Hyogi Sim, Youngjae Kim, Sudharshan Vazhkudai, Devesh Tiwari, Ali Anwar, Ali Butt, Lavayna Ramakrishnan, AnalyzeThis: An Analysis Workflow-Aware Storage System, ACM/IEEE International Conference on High Performance Computing, Networking, Storage and Analysis (SC), 2017
[HPC, Big Data, DS] Youngjae Kim, Scott Atchley, Geoffroy R. Vallee, Galen M. Shipman, LADS: Optimizing Data Transfers Using Layout-Aware Data Scheduling, USENIX Conference on File and Storage Technologies (FAST), 2015
[HPC, OS] Sarp Oral, et al, Best Practices and Lessons Learned from Deploying and Operating Large-Scale Data-Centric Parallel File Systems, ACM/IEEE International Conference on High Performance Computing, Networking, Storage and Analysis (SC), 2014
[HPC, Big Data] Devesh Tiwari, Simona Bobila, Sudharshan Vazhkudai, Youngjae Kim, Xiaosong Ma, Peter Desnoyers, Yan Solin, Active Flash: Towards Energy-Efficient, In-Situ Data Analytics on Extreme-Scale Machines, USENIX Conference on File and Storage Technologies (FAST) (2013)
[HPC, Big Data] Devesh Tiwari, Sudharshan Vazhkudai, Youngjae Kim, Xiaosong Ma, Simona Boboila, Peter Desnoyers, Reducing Data Movement Costs using Energy-Efficient Active, Computation on SSD, USENIX Workshop on Power-Aware Computing and Systems (HotPower), 2012.
[HPC, DS] Chao Wang, Sudharshan Vazhkudai, Xiaosong Ma, Fei Meng, Youngjae Kim, Christian Engelmann, NVMalloc: Exposing an Aggregate SSD Store as a Memory Partition in Extreme-Scale Machines, IEEE Int'l Parallel and Distributed Processing Symposium (IPDPS), 2012
[HPC, DS] Ramya Prabhakar, Sudharshan Vazhkudai, Youngjae Kim, Ali Butt, Min Li, Mahmut Kantemir, Provisioning a Multi-Tiered Data Staging Area for Extreme-Scale Machines, International Conference on Distributed Computing Systems (ICDCS), 2011
[HPC, DS] Min Li, Sudharshan Vazhkudai, Ali Butt, Fei Meng, Xiaosong Ma, Youngjae Kim, Christian Engelmann, Galen M. Shipman, Functional Partitioning to Optimize End-to-End Performance on Many-Core Architectures, IEEE/ACM Int'l Conference on High Performance Computing, Networking, Storage and Analysis (SC), 2010
[HPC] Jeonghwan Choi, Youngjae Kim, Anand Sivasubramaniam, Jelena Srebric, Qian Wang, Joonwon Lee, Modeling and Managing Thermal Profiles of Rack-mounted Servers with ThermoStat, International Symposium on High Performance Computer Architecture (HPCA), 2007 [Best Paper Nomination]

Big Data Analytics Storage

Searchable DFS

Key-Value Stores, File and Storage Systems, and Emerging I/O Technologies (NVMe, CXL) (Key-Value Stores, File Systems, ZNS/FDP SSDs, Computational & KV SSDs, Host–Device Co-design, NVMe, and CXL)

[OS] Junhyeok Park, Junghee Lee, Youngjae Kim, Redesigning Small Payload Transfer Paths for Emerging NVMe SSD Workloads, ACM Transactions on Storage (TOS), (in revision)
[OS] Yosep Ro, Changgyu Lee, Soon Hwang, Joo-Young Hwang, Hong-Yeon Kim, Youngjae Kim, Predictive Append: A New I/O Mechanism for Intra-Zone Parallelism in ZNS-Supporting File Systems, ACM International Middleware Conference (Middleware), Tarragona, Spain, December 2026.
[DB, OS] Sungjin Byeon*, Kyungwook Min*, Jaewan Park, Sangyun Lee, Hong-Yeon Kim, Junyoung Han, Joo-Young Hwang, Zhichao Cao, Youngjae Kim, ColdMap: Compaction-Aware Cost-Benefit Zone Cleaning for ZNS-Based Key-Value Stores, ACM International Conference on Supercomputing (ICS), Belfast, Northern Ireland, United Kingdom, July 6-9, 2026 (* Equal Contribution)
[DB] Jaewan Park, Kyungwook Min, Sungjin Byeon, Taewan Noh, Hyungi Park, Xubin He, Hongyeon Kim, Youngjae Kim, BucketLSM: Breaking the Compaction Scalability Barrier in LSM-Based Key-Value Stores, IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGRID), 2026 [Best Student Paper Nomination Award]
[OS] Junhyeok Park, Chang-Gyu Lee, Soon Hwang, Seung-Jun Cha, Woosuk Chung, Youngjae Kim, Maximizing Interconnect Bandwidth and Efficiency in NVMe-Based Key-Value SSDs with Fine-Grained Value Transfer, IEEE Micro Special Issue on Cache Coherent Interconnects and Resource Disaggregation Techniques (MICRO), 2025
[OS, Archi] Hyunsun Chung, Junhyeok Park, Taewan Noh, Seonghoon Ahn, Kihwan Kim, Ming Zhao, Youngjae Kim, OpenCXD: An Open Real-Device-Guided Hybrid Evaluation Framework for CXL-SSDs, IEEE Int'l Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS) (2025)
[DB] Safdar Jamil, Awais Khan, Xubin He, Youngjae Kim, DedupKV: A Space-Efficient and High-Performance Key-Value Store via Fine-Grained Deduplication, ACM International Conference on Supercomputing (ICS), 2025
[DB, OS, Archi] Kihwan Kim*, Hyunsun Chung*, Seonghoon Ahn*, Junhyeok Park, Safdar Jamil, Hongsu Byun, Myungcheol Lee, Jinchun Choi, Youngjae Kim, KVAccel: A Novel Write Accelerator for LSM-Tree-Based KV Stores with Host-SSD Collaboration, IEEE Int'l Parallel and Distributed Processing Symposium (IPDPS), 2025 (* Equal Contribution)
[OS] Junhyeok Park, Junghee Lee, Youngjae Kim, ByteExpress: A High-Performance and Traffic-Efficient Inline Transfer of Small Payloads over NVMe, ACM Workshop on Hot Topics in Storage and File Systems (HotStorage), 2025 [Best Paper Award]
[DB, Cloud] Jeeseob Kim, Hongsu Byun, Seungjae Lee, Myoungjoon Kim, Youngjae Kim, Zaipeng Xie and Sungyong Park, ECO-KVS: Energy-aware Compaction Offloading Mechanism for LSM-tree based Key-Value Stores in Edge Federation, IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing, 2025
[OS] Junhyeok Park, Chang-Gyu Lee, Soon Hwang, Soonyeal Yang, Jungki Noh, Woosuk Chung, Junghee Lee, Youngjae Kim, BandSlim: A Novel Bandwidth and Space-Efficient KV-SSD with an Escape-from-Block Approach, International Conference on Parallel Processing (ICPP), 2024
[DB, OS] Hamin Hwangbo, Joseph Ro, Sungjin Byeon, Safdar Jamil, Junyoung Han, Jooyoung Hwang, Youngjae Kim, Towards A Unified Garbage Collection Strategy in ZNS Key-Value Store File Systems Using Same-Victim GC, IEEE Int'l Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS), 2024
[DB, OS] 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, International Conference on Massive Storage Systems and Technology (MSST), 2024
[DB, OS] Sungjin Byeon, Joseph Ro, Safdar Jamil, Jeong-Uk Kang, Youngjae Kim, A Free-Space Adaptive Runtime Zone-Reset Algorithm for Enhanced ZNS Efficiency, ACM Workshop on Hot Topics in Storage and File Systems (HotStorage), 2023
[OS, Archi] Seungjin Lee, Changgyu Lee, Donghyun Min, Inhyuk Park, Woosuk Chung, Anand Sivasubramaniam, Youngjae Kim, Iterator Interface Extended LSM-tree-based KVSSD for Range Queries, ACM International Systems and Storage Conference (SYSTOR), 2023
[DB, Arch] Donghyun Min, Kihyun Kim, Chaewon Moon, Awais Khan, Seungjin Lee, Changhwan Yun, Woosuk Chung, Youngjae Kim, A Multi-Tenant Key-Value SSD with Secondary Index for Search Query Processing and Analysis, ACM Transactions on Embedded Computing Systems (TECS), 2023
[OS] Hyungjoon Kwon, Yonghyeon Cho, Awais Khan, Yeohyeon Park, Youngjae Kim, DeNOVA: Deduplication Extended NOVA File System, IEEE Int'l Parallel and Distributed Processing Symposium (IPDPS), 2022
[DB, OS] Hee-Rock Lee, Chang-Gyu Lee, Seungjin Lee, Youngjae Kim, Compaction-Aware Zone Allocation for LSM based Key-Value Store on ZNS SSDs, ACM Workshop on Hot Topics in Storage and File Systems (HotStorage), 2022
[OS, Archi] Donghyun Min, Youngjae Kim, Isolating Namespace and Performance in Key-Value SSDs for Multi-tenant Environments, ACM Workshop on Hot Topics in Storage and File Systems (HotStorage) (2021) [Best Paper Nomination]
[OS] June-Hyung Kim, Youngjae Kim, Safdar Jamil, Sungyong Park, A NUMA-aware NVM File System Design for Manycore Server Applications, IEEE Int'l Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS) (2020)
[OS, Security] Jinwoo Ahn, Junghee Lee, Yungwoo Ko, Donghyun Min, Jiyoon Park, Sungyong Park, Youngjae Kim, DiskShield: A Data Tamper-Resistant Storage for Intel SGX, ACM ASIA Conference on Computer and Communications Security (ASIACCS), 2020
[OS] Chang-Gyu Lee, Hyunki Byun, Sunghyun Noh, Hyeongu Kang, Youngjae Kim, Write Optimization of Log-structured Flash File System for Parallel I/O on Manycore Servers, ACM International Systems and Storage Conference (SYSTOR), 2019
[OS, Archi] Chang-Gyu Lee, Hyeongu Kang, Donggyu Park, Sungyong Park, Youngjae Kim, Jungki Noh, Woosuk Chung, Kyoung Park, iLSM-SSD: An Intelligent LSM-tree based Key-Value SSD for Data Analytics, IEEE Int'l Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS), 2019

RocksDB with KVSSD

NVM FS

NVMe Data Transfer

Storage Architectures for Emerging Storage Technologies (Flash/SSD Architectures, Computational Storage, Processing-in-Memory/Storage, Storage Security & Reliability, and Device-Level Resource Management)

[Arch, Modeling] Hongsu Byun, Safdar Jamil, Jungwook Han, Sungyong Park, Myungcheol Lee, Changsoo Kim, Beongjun Choi, Youngjae Kim, An Analytical Model-based Capacity Planning Approach for Building CSD-based Storage Systems, ACM Transactions on Embedded Computing Systems (TECS), 2024
[Arch, Modeling] Donghyun Min, Yungwoo Ko, Ryan Walker, Junghee Lee, Youngjae Kim, A Content-based Ransomware Detection and Backup Solid-State Drive for Ransomware Defense, IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems (TCAD), 2022
[Arch] Donghyun Min, Donggyu Park, Jinwoo Ahn, Ryan Walker, Junghee Lee, Sungyong Park, Youngjae Kim, Amoeba: An Autonomous Backup and Recovery SSD for Ransomware Defense, IEEE Computer Architecture Letters (CAL), 2018 [2018 Best Paper Award]
[Arch] Kalidas Ganesh, Youngjae Kim, Monobrata Debnath, Sungyong Park, Junghee Lee, LAWC: Optimizing Write Cache using Layout-Aware I/O Scheduling for All Flash Storage, IEEE Transactions on Computers (TC), 2017
[Arch, Big Data] Sangken Lee, Hyogi Sim, Youngjae Kim, Sudharshan Vazhkudai, AnalyzeThat: A Programmable Shared-Memory System for an Array of Processing-In-Memory Devices, IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGRID), 2017
[Arch, Security] Chintan Chavda, Ethan C. Ahn, Yu-Sheng Chen, Youngjae Kim, Kalidas Ganesh, Junghee Lee, Vulnerability Analysis of On-Chip Access-Control Memory, USENIX Workshop on Hot Topics in Storage and File Systems (HotStorage), 2017
[Arch] Junghee Lee, Youngjae Kim, Jongman Kim, Galen Shipman, Synchronous I/O Scheduling of Independent Write Caches for an Array of SSDs, IEEE Computer Architecture Letters (CAL), 2015
[Arch] Youngjae Kim, Junghee Lee, Sarp Oral, David Dillow, Feiyi Wang, Galen M. Shipman, Coordinating Garbage Collection for Arrays of Solid-state Drives, IEEE Transactions on Computers (TC), 2014
[Arch] Simona Boboila, Youngjae Kim, Sudharshan Vazhkudai, Peter Desnoyers, Galen M. Shipman, Active Flash: Out-of-core Data Analytics on Flash Storage, IEEE Symposium on Massive Storage Systems and Technologies (MSST) (2012)
[Arch] Youngjae Kim, Sarp Oral, Galen M. Shipman, Junghee Lee, David Dillow, Feiyi Wang, Harmonia: A Globally Coordinated Garbage Collector for Arrays of Solid-state Drives, IEEE Symposium on Massive Storage Systems and Technologies (MSST), 2011
[Arch, Modeling] Youngjae Kim, Aayush Gupta, Bhuvan Urgaonkar, Piotr Berman, Anand Sivasubramaniam, HybridStore: A Cost-Efficient, High-Performance Storage System Combining SSDs and HDDs, IEEE Int'l Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS), 2011
[Arch] Junghee Lee, Youngjae Kim, Galen M. Shipman, Sarp Oral, Feiyi Wang, Jongman Kim, A Semi-Preemptive Garbage Collector for Solid State Drives, IEEE Int'l Symposium on Performance Analysis of Systems and Software (ISPASS), 2011 [Best Paper Nomination]
[Arch] Aayush Gupta, Youngjae Kim, Bhuvan Urgaonkar, DFTL: A Flash Translation Layer Employing Demand-based Selective Caching of Page-level Address Mappings, International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS) (2009)
[Arch] Sudhanva Gurumurthi, Youngjae Kim, Anand Sivasubramaniam, Using STEAM for Thermal Simulation of Storage Systems, IEEE Micro Special Issue on Computer Architecture Simulation and Modeling (MICRO), 2006
[Arch] Youngjae Kim, Sudhanva Gurumurthi, Anand Sivasubramaniam, Understanding the Performance-Temperature Interactions in Disk I/O of Server Workloads, IEEE Int'l Symposium on High Performance Computer Architecture (HPCA), 2006

Honors & Awards

Best Student Paper Nominee Award, CCGrid, 2026
Nominated for Distinguished reviewer, HotStorage 2026

Sogang Outstanding Faculty Award (External Research Funding Category), Industry-Academic Cooperation Foundation, Sogang University, 2026
Best Paper Award, ACM HotStorage, 2025

Outstanding Large-Enrollment Teaching Award (Operating Systems), Fall 2025

Outstanding Researcher Award, Sogang University, 2025

Distinguished Paper Award Nomination, HiPC, 2025

Samsung Electronics DS Best Patent Invention Award, 2024

Sogang Ricci Engineering Young Fellow, 2021

Best Paper Award Nomination, HotStorage 2021

SK hynix 8th Industry-Academic Research Project Outstanding Invention Grand Prize, 2020 [News]

Best Paper Award, IEEE CAL 2018

Outstanding Research Award, Oak Ridge National Laboratory, 2012

Best Paper Award Nomination, ISPASS 2011

Best Paper Award Nomination, HPCA 2007

College of Engineering Fellowship, The Pennsylvania State University (2004-2007)

Korea Government IT Scholarship, Ministry of Information and Communication (45 students selected nationwide) (2004)

Graduated in 1st rank with the highest GPA in class, Sogang University (July 2001)

Program Committee

2028: FAST

2027:

2026: DAC, SC, CCGRID, ICDCS, MASCOTS, EURO-PAR, ICPP, HotStorage, REX-IO, HPCAsia, SSDBM, HPDC(Poster), PDSW, Cluster(Poster), HiPC(AI Systems and Applications Track), BTSD, BID, SoCC (External Review)

2025: DAC, HPCA, CCGRID, EURO-PAR, CLUSTER, HotStorage, PDSW, HiPC(Architecture Track), SOSP(Poster), NVMW, BID

2024: DAC, IPDPS, CCGRID, EURO-PAR, PDSW, HiPC(Architecture Track), SSDBM, NAS, BTSD

2023: IPDPS, CLUSTER, HiPC(Architecture Track), HPCAsia, HCM, EESA

2022: Systor, ISPASS, HotStorage, PDSW, HPCAsia, REX-I/O, SC (External), BTSD

2021: CCGrid, PDSW, HPCAsia, APSys, BTSD

2020: ICDCS, NVMSA, SIMUL, BTSD

2019: HPCAsia, BTSD

2018: HPCAsia, SNTA, NAS (External)

2017: NVMSA

2016: INFLOW, IC2E, NVMSA, HotStorage (External), DSN (External)

2015: NAS, NVMSA, HPDC (External), MSST (External)

2014: CLUSTER, ICPP, CCGRID, PDSW, DSSCB

2013: ICPAD, DSSCB, NAS (External)

Organizing Committee

2023: HPDC (Workshop co-chair)

2021: HPC Asia (Program Track Chair), AMGCC'21 (Workshop Co-Chair)

2020: NVMSA (Program Chair)

2019: APSys'19 (Publication Chair)

2016: NVMSA (Publicity Chair)

Journal Editor

Cluster Computing Journal'18 (Guest Editor)

Scientific Programming'18 (Guest Editor)

한국정보과학회 학술대회 수상

2026 한국소프트웨어 종합학술대회 학부생/주니어 논문 경진대회 학부생부문 최우수상, 최민석, et al, "LLM 서빙에서 Multi-GPU 병렬화 성능 분석"
2026 한국소프트웨어 종합학술대회 컴퓨터 시스템 분야 최우수상, 김준원, et al, "SurrogateKV: 어텐션 안정화 기반 의미보존 KV 캐시 압축"

2026 한국소프트웨어 종합학술대회 소프트웨어공학 분야 우수발표논문상, 유성연, et al, "AWS 환경에서 대규모 언어모델 기반 코드형 클라우드 인프라의 목표 지향적 보안 최적화 연구"

2025 한국소프트웨어 종합학술대회 컴퓨터 시스템 분야 장려상, 장성, et al, "LLM 서빙시 Head-of-Line 블로킹 완화를 위한 SLM 기반 LLM 출력 길이 예측 및 스케줄링 기법"

2021 한국소프트웨어 종합학술대회 컴퓨터 시스템 분야 우수상, 황순, et al, "매니코어 환경에서 Per-Core NAT를 통한 F2FS의 create() 확장성"

2020 한국소프트웨어 종합학술대회 컴퓨터 시스템 분야 우수상, 박중언, et al, "컨테이너 기반의 확장성 있는 Fabric-Attached Memory 관리 플랫폼"

2019 한국소프트웨어 종합학술대회 컴퓨터 시스템 분야 우수상, 안진우, et al, "SSD GUARD: 높은 권한의 데이터 변조 공격으로부터 파일 보호"

2019 한국소프트웨어 종합학술대회 정보보호 및 고신뢰 컴퓨팅 분야 우수상, "STT-MRAM 기반 스토리지 디바이스의 성능 및 파워, 발열에 대한 비교 분석 연구"

2018 한국소프트웨어 종합학술대회 컴퓨터 시스템 분야 우수상, 노성현, et al, "로그 기반 파일 시스템의 매니 코어 성능 및 확장성 분석"

2018 한국소프트웨어 종합학술대회 컴퓨터 시스템 분야 최우수상, 김장웅, et al, "비휘발성 메모리 파일시스템의 단일 파일에서의 쓰기 병렬화"

국내 활동

스토리지 시스템 연구회 위원장 (2025.03-27.02)
한국연구재단 국책연구본부 시스템S/W분야 (기획)전문위원 (2026.11-2027.10)

한국연구재단 국책연구본부 시스템S/W분야 (기획)전문위원 (2024.09-2026.10)

한국연구재단 국책연구본부 시스템S/W분야 (기획)전문위원 (2022.01-2024.08)

한국반도체학술대회 시스템소프트웨어 분과위원장 (2021-2022)

컴퓨터시스템소사이어티 부회장 (2021-현재)

컴퓨터시스템소사이어티 이사 역임 (2015-현재)

스토리지 시스템 연구회 이사 (2018-현재)

컴퓨터시스템 소사이어티 동계학술대회 (2023 공동 운영위원장)

NVRAMOS (2022 워크샵 위원장)

Linux Kernel Camp (2012 공동위원장), NVRAMOS (2021 워크샵 위원장)

NVRAMOS (2020 프로그램 위원장)

FISS (2019 프로그램 위원장)

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