News & Updates

Kihwan Kim, Hyunsun Chung, Seonghoon Ahn, Junhyeok Park, Safdar Jamil, Hongsu Byun, and Youngjae Kim's paper on "KVAccel: A Novel Write Accelerator for LSM-Tree-Based KV Stores with Host-SSD Collaboration" has been accepted in International Parallel and Distributed Processing Symposium (IPDPS).

Kyuli Park, Dongjae Lee, Yeonwoo Jeong, Sungyong Park's paper titled "Towards an Asynchronous Commit in Micro-batch Streaming Systems with Log-Structured Merge-tree based Key-Value Store" has been accepted in Cluster Computing Journal (SCIE).

Research in the field of AI Systems: Kihyun Kim, and Youngjae Kim's paper on "DRAM 기반 스토리지를 활용한 RAG 기반 LLM 추론 가속화 연구" has been accepted in KCS 2025.

Research in the field of AI Systems: Hyungwoo Lee, Kihyun Kim, and Youngjae Kim's paper on "High-Performance LLM RAG System Utilizing Disk-Based KV Cache in Vector Database" has been accepted in KSC 2024.

Research in the field of AI Systems: Jinwoo Kim, Kihyun Kim, Yoochan Kim and Youngjae Kim's paper on "Resolving I/O Bottlenecks through Partition Prediction and Preloading in Large-Scale Disk-based GNN Training" has been accepted in KSC 2024.

Safdar Jamil, Joseph Ro and Youngjae Kim's paper on "Efficient Data Placement in Deduplication enabled ZenFS via CRC-Based Prediction" has been accepted in IEEE Access.

GyeongHwan Jung, Yeonwoo Jeong, Kyuri Park, Dongjae Lee, Hongsu Byun, Suyeon Lee, Sungyong Park's paper on "dStream: An Online-based Dynamic Operator-level Query Mapping Scheme on Discrete CPU-GPU Architectures" has been accepted in IEEE Access.

Soon Hwang, Junhyeok Park, Junghyun Ryu, Youngjae Kim's WIP Proposal titled "Improving SQL Query Execution of a Distributed SQL Query Engine on Object-Based Computational Storage through Multi-Layered Offloading" has been accepted for presentation in the 9th International Parallel Data Systems Workshop (PDSW'24).

Our DISCOS Lab. received the Mid-career Research Grant (중견연구) for “Research on Hardware-Software Co-Design for Building a Software Defined Computational Storage Ecosystem” (National Research Foundation of Korea, 2024.09 ~ 2029.08) (PI: Prof. Sungyong Park, Co-PI: Prof. Yongjae Kim).

Junghyun Ryu was selected for the Master's Student Research Encouragement Grant from the National Research Foundation of Korea. He will conduct research over the next year on the topic of exploring the utility of DPU in storage systems. Congratulations!

Seoyeong Lee, Awais Khan, Yoochan Kim, Junghwan Park, Soon Hwang, Youngjae Kim’s paper titled ‘Fault-Tolerant Deep Learning Cache with Hash Ring for Load Balancing in HPC Systems’ has been accepted in Proceedings of the 9th International Parallel Data Systems Workshop (PDSW’24).

Farid Talibli has joined us as a new MS/PhD student. Welcome aboard!

DISCOS Lab received new funding (2024) from NRF under the research title "대규모 머신러닝 가속화를 위한 고성능 계산-데이터 플랫폼 연구", 서강대학교, 2024년도 과학기술정보통신부 글로벌 기초연구실 지원사업 신규과제 선정 (연구책임자: 김영재 교수, 공동연구원: 박성용 교수).

Honghyeon Yoo, Hongsu Byun and Sungyong Park’s poster titled ‘Refining Compaction Offloading I/O Stack for LSM-based Key-Value Stores with SPDK’ has been accepted in the IEEE International Conference on Cluster Computing (IEEE CLUSTER’24).

Hamin Hwangbo, Joseph Ro, Sungjin Byeon, Safdar Jamil and Youngjae Kim's paper on "Towards A Unified Garbage Collection Strategy in ZNS Key-Value Store File Systems Using Same-Victim GC" has been accepted for presentation at the 32nd International Symposium on the Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS).

Yonghyeon Cho, Yoochan Kim, Kihyun Kim, Jinwoo Kim, Youngjae Kim's paper on "Optimizing Multi-level Checkpointing for Distributed Deep Learning Workloads on Cloud Spot VM Cluster" has been accepted in IEEE Access.

The paper titled 'ML-based Dynamic Operator-Level Query Mapping for Stream Processing Systems in Heterogeneous Computing Environments' authored by Sejeong Oh, Gordon Euhyun Moon and Sungyong Park, has been accepted in the IEEE International Conference on Cluster Computing (IEEE CLUSTER`24).

The paper titled 'Coordinating Compaction between LSM-tree based Key-Value Stores for Edge Federation' authored by Jeeseob Kim, Honghyeon Yoo, Seungjae Lee, Hongsu Byun and Sungyong Park, has been accepted in the IEEE International Conference on Cloud Computing
(IEEE CLOUD'24).

Soon (PhD student) completed an internship at Oak Ridge National Lab during the last winter vacation, and as a result, contributed to the publication of an I/O acceleration poster for distributed deep learning at SOS26.

Sungjin Byeon, Joseph Ro, Youngjae Kim's paper titled "Ensuring Compaction and Zone Cleaning Efficiency through Same-Zone Compaction in ZNS Key-Value Store" has been accepted in the 38th International Conference on Massive Storage Systems and Technology (MSST).

Hyungwoo Lee has joined us as new MS students. Welcome on board!

Yoochan Kim, Kihyun Kim, Jinwoo Kim, Youngjae Kim's paper titled "DeepVM: Integrating Spot and On-Demand VMs for Cost-Efficient Deep Learning Clusters in the Cloud" has been accepted in the 24th IEEE/ACM International Symposium on Cluster, Cloud and Internet Computing (CCGrid).

Kyuri Park, Sungyong Park's paper titled "Performance Improvement Using Multi Checkpointing Technique in Micro-batch Streaming System" has been selected as the best paper presentation award in the field of the high performance computing at Korea Software Congress (KSC'23).

Yeohyeon Park, Junhyeok Park, Junghwan Park, Awais Khan, Kyungpyo Kim, Sung-Soon Park, Youngjae Kim's Paper on "OctoFAS: A Two-Level Fair Scheduler for Enhancing Fairness in Network-based Key-Value Storage" has been accepted in MDPI Electronics (Electronics).

Soyang Baek, Dongjae Lee, Honghyeon Yoo, Sungjin Byeon and Junhyeok Park have joined us as new MS students. Welcome on board!

Hongsu Byun, Safdar Jamil, Sungyong Park, Youngjae Kim's Paper on "An Analytical Model-based Capacity Planning Approach for Building CSD-based Storage Systems" has been accepted in the Transactions on Embedded Computing Systems (TECS).

Yeohyeon Park, Junhyeok Park, Junghwan Park, Chang-Gyu Lee, and Youngjae Kim's paper on "OctoKV: An Agile Network-based Key-Value Storage System with Robust Load Orchestration" has been accepted in the 31st International Symposium on the Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS) 2023.

Soon Hwang (PhD) has joined us. Welcome on board!

Kyuri Park, Sungyong Park's paper titled "Performance Evaluation and Analysis for LSM based Persistent Key-Value Store in Streaming Application" has been selected as the best presentation award in the field of the high performance computing at Korea Computer Congress (KCC'23).

Prof. Youngjae Kim's co-authored Paper on "TomDB: A Hardware-Accelerated Key-Value Store for Data-Intensive Applications" has been accepted in the IEEE conference on Cluster Computing (Cluster'23).

Sungjin Byeon, Joseph Ro, Safdar Jamil, Jeong-Uk Kang, Youngjae Kim's Paper on "A Free-Space Adaptive Runtime Zone-Reset Algorithm for Enhanced ZNS Efficiency" has been accepted in the 15th ACM Workshop on Hot Topics in Storage and File Systems (HotStorage'23).

Donghyun Min, Kihyun Kim, Seungjin Lee, Youngjae Kim's Paper on "A Multi-Tenant Key-Value SSD with Secondary Index for Search Query Processing and Analysis" has been accepted in the Transactions on Embedded Computing Systems (TECS).

Siu Jung, Seungjin Lee, Jungwook Han, Youngjae Kim's Paper on "Preemptive Zone Reset Design within Zoned Namespace SSD Firmware" has been accepted in MDPI Electronics (Electronics).

Jinhoon Lee, Yeonwoo Jung, Suyeon Lee, Safdar Jamil, Youngjae Kim's Paper on "MFence: Defending Against Memory Access Interference in a Disaggregated Cloud Memory Platform" has been accepted in the 38th ACM/SIGAPP Symposium On Applied Computing (SAC) 2023.

Abdul Salam, Safdar Jamil, Sungwon Jung, Sung-Soon Park, Youngjae Kim's Paper on "Future-based Persistent Spatial Data Structure for NVM-based Manycore Machines" has been accepted in IEEE Access.

Safdar Jamil, Abdul Salam, Awais Khan, Youngjae Kim's Paper on "Scalable NUMA-aware Persistent B+-tree for Non-Volatile Memory Devices" has been accepted in Cluster Computing Journal (SCIE).

Suyeon Lee, Yeonwoo Jeong, Kyuri Park, GyeongHwan Jung, Sungyong Park's Paper on "zStream: Towards a Low Latency Micro-Batch Streaming System" has been accepted in Cluster Computing Journal (SCIE).

Yeohyeon Park, Chang-gyu Lee, Seungjin Lee, Youngjae Kim's Paper on "BTS : Exploring Effects of Background Task-Aware Scheduling for Key-Value CSDs" has been accepted in the 7th International Parallel Data Systems Workshop(PDSW 2022) at SC22.

Safdar Jamil, Awais Khan, Kihyun Kim, Youngjae Kim's Paper on "DENKV: Addressing Design Trade-offs of Key-value Stores for Scientific Applications" has been accepted in the 7th International Parallel Data Systems Workshop(PDSW 2022) at SC22.

Heerock Lee, Chang-gyu Lee, Seungjin Lee, Youngjae Kim's Paper on "Compaction-Aware Zone Allocation for LSM based Key-Value Store on ZNS SSDs" has been accepted in the 14th ACM Workshop on Hot Topics in Storage and File Systems (HotStorage'22).

Safdar Jamil, Awais Khan, Youngjae Kim's WiP on Exploring Data Deduplication in LSM Tree-based Key-Value Stores has been accepted and invited to present in USENIX Conference on File and Storage Technologies (FAST'22).

Hyungjoon Kwon, Yonghyeon Cho, Awais Khan, Yeohyeon Park, Youngjae Kim's paper on DeNOVA: Deduplication Extended NOVA File System has been accepted in the 36th IEEE International Parallel and Distributed Processing Symposium (IPDPS'22).

Soon Hwang's paper on "Enabling Scalability in F2FS create() by Per-Core NAT" was selected as the best paper in the field of computer systems at KSC (Korea Software Congress) 2021.

Jungwook Han, Suyeon Lee and Safdar Jamil's (3) Three different Papers has been accepted in The 9th International Workshop on Autonomic Management of high performance Grid and Cloud Computing (AMGCC'21).

Donghyun Min, Yungwoo Ko, Junghee Lee, Youngjae Kim's Paper on "A Content-based Ransomware Detection and Backup Solid-State Drive for Ransomware Defense" has been accepted in IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems (TCAD).

DISCOS lab is excited to share the great news that Prof. Youngjae Kim's first Ph.D. Awais Khan accepted a position offer at Oak Ridge National Laboratory (ORNL), Tennessee, USA. Big Congratulations to Dr. Awais and best of luck for his future endeavors.

Yeonwoo Jeong, Esrat Maria, Sungyong Park's Paper on "Towards Energy-Efficient Service Scheduling in Federated Edge Clouds" has been accepted in Cluster Computing Journal (SCIE).

DISCOS Lab received new funding (2021) from ETRI under the research title "메모리 중심 컴퓨팅 환경에서의 응용 프로그래밍 모델 개발/Developing an application programming model in a memory-centric environment".

DISCOS Lab received new funding (2021) from ETRI under the research title "CSD 활용 블록체인 데이터 고속처리 시제품 개발/Developing high-speed data processing prototypes of blockchain using Computational Storage Device (CSD)".

Donghyun Min, Youngjae Kim's Paper on "Isolating Namespace and Performance in Key-Value SSDs for Multi-tenant Environments" has been accepted in the Proceeding of the 13th USENIX Workshop on Hot Topics in Storage and File Systems (ACM HotStorage).

Awais Khan, Hyogi Sim, Sudharshan S. Vazhkudai, Myeong-Hoon Oh, Youngjae Kim's Paper on "MOSIQS: Persistent Memory Object Storage with Metadata Indexing and Querying for Scientific Computing" has been accepted in IEEE Access.

Soon Hwang, Changgyu Lee, Youngjae Kim's poster titled "Enabling Manycore Scalability in F2FS Metadata for unlink() Operation" has been accepted in the ACM International Systems and Storage Conference (SYSTOR'21). [Poster Acceptance Rate: 10/18 = 55.6%, 10 papers accepted out of 18 submitted]

DISCOS Lab received new funding (2021-2017) from Institute of Information & Communications Technology Planning & Evaluation (IITP).

DISCOS Lab received new funding (2021-2017) from Institute of Information & Communications Technology Planning & Evaluation (IITP) under the research title “하드웨어 중심 신뢰계산기반과 분산 데이터보호박스를 위한 표준 프로토콜 개발/Standard Protocol Development for Hardware-centric Trust Computing and Distributed Data Protection Box” (Sub-Project Investigator: Prof. Youngjae Kim) (PI: Korea University, Sub-PIs: Kookmin University, ZyCropto).

Suyeon Lee, Sungyong Park's paper titled "Performance Analysis of Big Data ETL Process over CPU-GPU Heterogeneous Architectures" has been accepted in the Joint International Workshop on Big Data Management on Emerging Hardware and Data Management on Virtualized Active Systems (HardBD & Active'21).

DISCOS Lab received new funding for joint research from National Research Foundation of Korea (NRF) under the research title "Hardware/Software Co-Design for ZNS SSD-based Key-Value Store" (PI: Prof. Youngjae Kim, Co-PI: Prof. Sungyong Park).

Jaewon Son, Yonghyuk Yoo, Kui-rae Kim, Youngjae Kim, Kwonyong Lee, Sungyong Park's Paper on "A GPU Scheduling Framework to Accelerate Hyper-Parameter Optimization in Deep Learning Clusters" has been accepted in MDPI Electronics.

Yeonwoo (Phd student) won the Best Paper Award (우수논문상) at KSC 2021 for "An Energy Efficient Reconfiguration Algorithm using Reinforcement Learning in Federated Edge Cloud."

Heerock (MS student) won the Best Paper Award (우수논문상) at KSC 2021 for "Scalable Container-based Software Platform for Fabric-Attached Memory Pool."

June-Hyung Kim, Youngjae Kim, Safdar Jamil, Chang-Gyu Lee, Sungyong Park's Paper on "Parallelizing Shared File I/O operations of NVM File System for Manycore Servers" has been accepted in IEEE Access.

DISCOS Lab received new funding from Koh Young Technology (Development of Real-time Distributed Computing Platform for Big Manufacturing Data).

DISCOS Lab received new funding from SK hynix (Accelerating Big Data Analytics using Computational SSD).

Min-Gyo Jeong, Chang-Gyu Lee, Dong-Gyu Park, Sungyong Park, Youngjae Kim's Paper on "GPUKV: An Integrated Framework with KVSSD and GPU through P2P Communication Support" In Proceedings of the 36th ACM/SIGAPP Symposium On Applied Computing (SAC) 2021.

Chang-Gyu Lee, Sunghyun Noh, Soon Hwang, Hyeongu Kang, Youngjae Kim's Paper on "Concurrent File Metadata Structure using Readers-Writer Lock" In Proceedings of the 36th ACM/SIGAPP Symposium On Applied Computing (SAC) 2021.

Awais khan Ph.D. Dessertation open lecture will going to be held on 26th November 2020.(Online Zoom session) Click for details

Awais khan, Prince Hamandawana, Youngjae Kim's paper on "A Content Fingerprint-based Cluster-wide Inline Deduplication for Shared-Nothing Storage Systems" has been accepted in IEEE Access.

Awais's paper on "An Analysis of System Balance and Architectural Trends Based on Top500 Supercomputers" in collaboration with ORNL has been accepted in HPC Asia 2021.

A paper where Prof. Youngjae Kim co-authored in collaboration with Korea University on “PhantomFS-v2: Dare You To Avoid This Trap” has been accepted in the IEEE Access.

Awais Khan, Hyogi Sim, Sudharshan S. Vazhkudai, Jinsuk Ma, Myeong-Hoon, Youngjae Kim‘s paper on “Persistent Memory Object Storage and Indexing for Scientific Computing” has been accpeted in the Workshop of Memory Centric High Performance Computing (MCHPC) 2020.

Kui-rai Kim, Youngjae Kim, Sungyong Park‘s paper on “A Probabilistic Machine Learning Approach to Scheduling Parallel Loops with Bayesian Optimization” has been accepted in IEEE Transactions on Parallel and Distributed Systems (TPDS) journal.

June-Hyung Kim, Youngjae Kim, Safdar Jamil, Sungyong Park‘s short paper on “A NUMA-aware NVM File System Design for Manycore Server Applications” has been accepted in the Proceeding of the MASCOTS 2020.