People

Currently Advising Students (2015~ )

I am fortunate to work with the following wonderful postdoc/students. 

PostDoc

1. Amol JaKar (PhD), 2018-

Graduate Students

1. Awais Khan (PhD Course) (2015-)

2. Changgyu Lee (PhD Course) (2015-)

3. Safdar Jamil (PhD Course) (2018-)

4. Donghyun Min (MS Course) (2017-)

5. Donggyu Park (MS Course) (2017-) Primary advisor: Prof. Sungyong Park (advising OS security and key-value storage research) 

6. Hyungoo Kang (MS Course) (2018-)

7. Hyunki Byun (MS Course) (2017-)

8. Jangwoong Kim (MS Course) (2017-) Primary advisor: Prof. Sungyong Park (advising Non-volatile memory file system research) 

9. Jinwoo Ahn (MS Course) (2017-)

10. Preethika Kasu (MS Course) (2016-) Currently affiliated with AJOU University  

11. Sunghyun Noh (MS Course) (2018-)

12. Taeuk Kim (MS Course) (2017-)

13. Sanggoo Han (BS Course/Intern) (2017-)

Undergraduate Students

1. Sanggoo Han (BS Course/Undergraduate Intern)

Alumni (with First Employment)

1. Ronnie Mativenga (MS Course, 2015-2017), currently pursuing PhD in Computer Engr., Ajou Univ.

   • Achievements

     • R. Mativenga, et. al., Minimizing CMT Miss Penalty in Selective Page-level Address Mapping Table, (short) in Proceedings of IEEE International Conference on Cluster Computing (Cluster) (2016), Taipei, Taiwan, September 2016. 

     • R. Mativenga, et. al., RFTL: Improving Performance of Selective Caching-based Page-level FTL through Replication, Cluster Computing: The Journal of Networks, Software Tools and Applications (in major revision) 

2. Prince Hamandawana (MS Course, 2016-2018), currently pursuing PhD in Computer Engr., Ajou Univ. 

   • Achievements

     • P. Hamandawana, et. al., Accelerating the Data Deduplication Performance with GPU in Hybrid Storage Systems, (WiP) PDSW-DISCS'17 (held in conjunction with SC'17), Denver, CO USA. 

Past Students and Post-Docs Who I advised 

I am fortunate to have worked closely with the following students and post-docs:

• 2016

  • Xu Ji, PhD student (Peking University) 2013- 

    • Current Interests: Memory-access pattern analysis using kernel-level profiler (instrumented linux page-cache) 

  • Hyogi Sim, PhD student (Virginia Tech) 2011- 

    • Current Interests: Versatile file systems, Distributed analysis workflow-aware file systems

  • Lipeng Wan (PhD) (University of Tennessee at Knoxville) 2011- (First employer: Post-Doctoral ResearcherResearcher, Oak Ridge National Laboratory, TN, USA)

    • Current Interests: Performance and lifetime tradeoff analysis for checkpoint workloads in HPC 

  • Kalidas Ganesh, MS student, University of Texas at San Antonio (First employer: BDIPLus - Big Data Management Software Products, NY, USA)

    • I/O Parallelism in Write Buffer for high performance SSD arrays

    • Security research on memory for secure storage 

• 2015 

  • Matt Lee, post-doc, ORNL

    • Process in memory (PIM) and MapReduce Workloads

    • SSD lifetime and performance tradeoff study for SSD memory extension and checkpoint workloads using graph analysis methods

  • Hyogi Sim, PhD student, Virginia Tech

    • Design and developing a new analysis workflow-aware file system 

• 2014

  • Hyogi Sim, PhD student, Virginia Tech (First employer: Post-Masters Storage Systems Researcher, Oak Ridge National Laboratory, TN, USA)

    • Developing file systems with workflow awareness

  • Sam Shadwel (Rice University)

    • Characterization of the Community Earth System Model (CESM) workflow

  • Sean McDaniel (University of Delaware)

    • I/O kernel extraction for Hardware Accelerated Cosmology Code (HACC)

• 2013

  • Hyogi Sim, PhD student, Virginia Tech (a long term research intern in TechInt Group from Jan to Aug in 2013)

    • Building OSD T10 based Active Flash evaluation framework 

• 2012

  • Devesh D. Tiwari, PhD student, NC State (First employer: Research Scientist, Oak Ridge National Laboratory)

    • Project: Using SSDs for Energy-Efficient Active Computation in Extreme-scale Computing Environment

• 2011

  • Simona Boboila, PhD student, Northeastern University (First employer: Software Engineer, EMC Corp.)

    • Project: Active Flash: Out-of-core Data Analytics on Flash Storage

  • Junghee Lee, PhD student, Georgia Tech (First employer: Assistant Professor at University of Texas at San Antonio)

    • Project: Performance Improvement of SSD based Storage Systems (Summer 2011)

  • Seunghwan Lim, PhD student, Penn State (First employer: Post-Doc, Oak Ridge National Laboratory)

    • Project: Performance Modeling of Application Slow-Down in Shared Systems Environment with Multiple Resources

• 2010

  • Junghee Lee, PhD student, Georgia Tech (Summer intern at ORNL TechInt Group)

    • Project: Design and Implementation of Preemptive Garbage Collector for Solid State Drives (Summer 2010)

  • Ramya Prabhakar, PhD Student, Penn State (Summer intern for 2010 at ORNL Computer Science Research Group) (First employer: NetApp)

    • Project: Provisioning a Multi-Tiered Data Staging Area using NVRAM Devices for Extreme-Scale Machines

  • Fei Meng, PhD student, NC State (Student Intern for 2010-2011 at ORNL Computer Science Research Group)

    • Project: Enhancing stdchk FUSE based file systems

I am fortunate to collaborate (have collaborated) with the following people (some co-authored in papers) for various systems research projects

• Nosayba El-Sayed (MIT/Qatar Computing Research Institute)

• Scott Atchley, Raghul Gunasekaran, David Dillow (now at Google), Jason Hill, Ryan A. Kerekes, Seung-Hwan Lim, Hai-Ah Nam (now at Los Alamos Natl' Lab), Sarp Oral, Hoony Park, Galen M. Shipman (now at Los Alamos Natl' Lab), Devesh Tiwari, Geoffroy R. Vallee, Sudharshan Vazhkudai, Chao Wang, Feiyi Wang, Matt Lee (Oak Ridge National Laboratory)

• HyukJun Lee, Sungyong Park (Sognag University)

• Ali Butt (Virginia Tech)

• Xiaosong Ma (Qatar Computing Research Institute)

• Peter Desnoyers  (Northeastern University)

• Junghee Lee (University of Texas at San Antonio)

• Jongman Kim (Georgia Tech) 

• Zhe Zhang, Min Li (IBM TJ Waston)

• Anand Sivasubramaniam, Bhuvan Urgaonkar, Pitro Berman, Chita Das  (Pennsylvania State University)

• Sudhanva Gurumurthi (University of Virginia)