Youngjae's photo
Research Interests:
  • General research areas are computer systems, operating systems, system software, computer architecture, embedded systems, high performance computing and cloud computing.
  • Research interests include operating systems, memory systems, file systems, I/O, virtualization, performance modeling, analysis and turning, scheduling, data processing and management, application tools development, parallel processing, and power and thermal management.
Education:
Appointments:
Selected Publications: (Click here for full list of publications)
  • NVMalloc: Exposing an Aggregate SSD Store as a Memory Partition in Extreme-Scale Machines, IPDPS'12
  • Enhancing I/O Throughput via Efficient Routing and Placement for Large-scale Parallel File systems, IPCCC'11
  • Migration, Assignment, and Scheduling of Jobs in Virtualized Environment, USENIX HotCloud'11
  • Provisioning a Multi-Tiered Data Staging Area for Extreme-Scale Machines, ICDCS'11
  • Harmonia: A Globally Coordinated Garbage Collector for Arrays of Solid-state Drives, MSST'11
  • HybridStore: A Cost-Efficient, High-Performance Storage System Combining SSDs and HDDs, MASCOTS'11
  • Workload Characterization of a Leardership Class Storage, PDSW'10
  • DFTL: A Flash Translation Layer Employing Demand-based Selective Caching of Page-level Address Mappings, ASPLOS'09
  • Managing Thermal Emergencies in Disk-based Storage Systems, ASME JEP'08
  • Modeling and Managing Thermal Profiles of Rack-mounted Servers with ThermoStat, HPCA'07
  • Understanding the Performance-Temperature Interactions in Disk I/O of Server Workloads, HPCA'06
Recent News! (Click here for full list of news)
  • [Publication] (2/29/12) GC coordination for SSD RAID and Active flash papers will be presented in 2012 Non-Volatile Memories Workshop.
  • [Publication] (12/12/11) NVMalloc paper has been selected to appear in IPDPS 2012.
  • [Travel] (11/12-18/11) Attending SC'11 and PDSW'11 at Seattle, WA.
  • [Life] Yu Jung's Piano Concerto with Temple University Sinfonia in Lew Klein Hall, Philadelphia on Nov. 17th, 2011.
  • [Publication] (09/25/11) Our paper "Enhancing I/O Throughput via Efficient Routing and Placement for Large-scale Parallel File Systems" got accepted to appear in IEEE IPCCC 2011.
  • [Invited Talk] (Sept 2011) Computer Science Departmental Colloquium in University of Pittsburgh.
  • [Invited Talk] (July 2011) CSE departmental colloquium in Seoul National University.
  • [Position] (06/28/11) Adjunct Professor Appointment in GaTech.
  • [Talk/Travel] (05/24-28/11) Attending SNAPI workshop and MSST conference at Denver, CO.
  • [Summer Intern] (05/23/11) Junghee will start his second summer internship at ORNL from May 23rd. I will be mentoring him during his internship at ORNL. Welcome on board!!!
  • [Summer Intern] (05/16/11) Simona joined Computer Sci&Research group as a summer intern. She will be collaborating with me, Chao, and Sudharshan (Primary Mentor). Welcome on board!
  • [Publication] (04/22/11) HybridStore paper got accepted to appear in MASCOTS 2011.
  • [Publication] (04/11/11) Our paper on "Migration, Assignment, and Scheduling of Jobs in Virtualized Environment" has been selected to appear in USENIX HOTCLOUD 2011.
  • [Travel] (April 8-11.2011) Visiting State College to attend Penn State Computer Systems Lab alumni reunion party. (Click to see Photo)
  • [Lecture] (03/09/11) Giving an invited lecture on SSDs and Application in HPC in ECE dept., Georgia Tech in Atlanta.