Masato Asahara

English / Japanese

E-mail: masato_asahara [at] gmail_com (replace _ with .)

Masato@Seattle

He visited the Space Needle in Seattle.

Short bio

Masato Asahara was born in 1982. He received his B.E. degree from The Univ. of Electro-communications in 2005, M.E. degree and Ph.D. degree from Keio Univ. in 2007 and 2011, respectively (Supervisor: Associate Professor Kenji Kono). He joined NEC in 2010 and worked at NEC Green Platform Research Labs. He currently works at a branch office of NEC Knowledge Discovery Research Laboratories in Cupertino, CA. He has been a visiting researcher at Keio University since 2011. His research interests include cloud computing, Peer-to-Peer systems, distributed systems, middleware and operating systems.

Project

  • LoadAtomizer: A Locality and I/O Load aware Task Scheduler for MapReduce
  • ExaPeer: Constructing An Infrastructure for Repositioning Replica Servers on the Basis of Demand Fluctuations

Publications

International Conferences (Refereed)

  • Minimizing WAN Communications in Inter-Datacenter Key-Value Stores.
    Hikaru Horie, Masato Asahara, Hiroshi Yamada, Kenji Kono.
    In Proc. of the 7th IEEE Int'l Conf. on Cloud Computing (Cloud'14), Alaska, USA, Jun. 2014.
  • A Single Key Space, Inter-Datacenter Key-Value Store.
    Hikaru Horie, Masato Asahara, Hiroshi Yamada, Kenji Kono.
    In Proc. of the 19th IEEE Int'l Conf. on Parallel and Distributed Systems (ICPADS'13), Poster session, Seoul, Korea, Dec. 2013.
  • LoadAtomizer: A Locality and I/O Load aware Task Scheduler for MapReduce.
    Masato Asahara, Shinji Nakadai, Takuya Araki.
    In Proc. of the 4th IEEE Int'l Conf. on Cloud Computing Technology and Science (CloudCom'12), pp. 317–324, Taipei, Taiwan, Dec. 2012.
  • Inter-Datacenter Elastic Key-value Storage.
    Hikaru Horie, Masato Asahara, Hiroshi Yamada, Kenji Kono.
    In Proc. of the 10th Int'l Conf. on Optical Internet (COIN'12), pp. 71–72, Yokohama, Japan, May 2012.
  • Efficient Update Propagation by Speculating Replica Locations on Peer-to-Peer Networks.
    Ai Hayakawa, Masato Asahara, Kenji Kono, Toshinori Kojima.
    In Proc. of the 15th IEEE Int'l Conf. on Parallel and Distributed Systems (ICPADS'09), pp. 422–431, Shenzhen, China, Dec. 2009.
  • Embedding Network Coordinates into the Heart of Distributed Hash Tables.
    Toshinori Kojima, Masato Asahara, Kenji Kono, Ai Hayakawa.
    In Proc. of the 9th IEEE Int'l Conf. on Peer-to-Peer Computing (P2P'09), short paper session, pp. 155–158, Seattle, WA, USA, Sep. 2009.
  • Finding Candidate Spots for Replica Servers based on Demand Fluctuation.
    Masato Asahara, Akio Shimada, Hiroshi Yamada, Kenji Kono.
    In Proc. of the 13th IEEE Int'l Conf. on Parallel and Distributed Systems (ICPADS'07), 10 pages, Hsinchu, Taiwan, Dec. 2007.

Journals

  • MashCache: Taming Flash Crowds by Using Their Good Features.
    Hikaru Horie, Masato Asahara, Hiroshi Yamada, Kenji Kono.
    IPSJ Trans. on Advanced Computing Systems, Vol.5, No.2, pp. 10–22, Mar. 2012.
  • Live Wide-Area Migration of Virtual Machines by Exploiting Application Layer Protocol Context.
    Yutaka Ishikawa, Hiroshi Yamada, Masato Asahara, Miyuki Hanaoka, Kenji Kono.
    IPSJ Trans. on Advanced Computing Systems, Vol.4, No.2, pp. 12–24, Mar. 2011. (in Japanese)
  • Practical Approach to Integrating Network Coordinates with Distributed Hash Tables.
    Toshinori Kojima, Masato Asahara, Kenji Kono, Ai Hayakawa.
    IPSJ Trans. on Advanced Computing Systems, Vol.4, No.1, pp. 95–110, Feb. 2011.
  • P2P-Based Approach to Finding Replica Server Locations for Alleviating Flash Crowds.
    Masato Asahara, Kenji Kono, Toshinori Kojima, Ai Hayakawa.
    IEICE Trans. on Information and Systems, Vol.E93-D, No.11, pp. 3027–3037, Nov. 2010.
  • A Strategy for Efficient Update Propagation on Peer-to-Peer based Content Distribution Networks.
    Ai Hayakawa, Masato Asahara, Kenji Kono, Toshinori Kojima.
    IPSJ Trans. on Advanced Computing Systems, Vol.3, No.3, pp. 138–152, Sep. 2010.
  • Strategy for Selecting Replica Server Spots on the Basis of Demand Fluctuations.
    Masato Asahara, Akio Shimada, Hiroshi Yamada, Kenji Kono.
    IPSJ Trans. on Advanced Computing Systems, Vol.1, No.1, pp. 160–173, Jun. 2008.

Talks

Japanese Domestic Workshops (In Japanese)

  • A Robust MapReduce Task Scheduler to Detect Outliers in System State Variation.
    Masato Asahara, Yoritaka Fujimori, Kazuyo Narita, Jianquan Liu.
    In IPSJ Technical Report, 2013-OS-126, 9 pages, Jul. 2013.
  • Inter-Datacenter Elastic Key-value Storage.
    Hikaru Horie, Masato Asahara, Hiroshi Yamada, Kenji Kono.
    In IPSJ Technical Report, 2012-OS-122, 7 pages, Aug. 2012.
  • MashCache: Making Mashup-Services Resistant to Flash Crowds.
    Hikaru Horie, Masato Asahara, Hiroshi Yamada, Kenji Kono.
    In IPSJ Technical Report, 2011-OS-116, No. 1, 9 pages, Jan. 2011.
  • Robust Mashup-Service Using Client Resources.
    Hikaru Horie, Masato Asahara, Kenji Kono.
    In IPSJ Technical Report, 2009-OS-112, No. 5, 8 pages, Aug. 2009.
  • Analysis of the Latency Fluctuations on the Logical Links of Overlay Networks.
    Masato Asahara, Kenji Kono.
    In IPSJ Technical Report, 2009-OS-112, No. 16, 9 pages, Aug. 2009.
  • Topologically-aware Distributed Hash Table with Network Coordinates.
    Toshinori Kojima, Masato Asahara, Ai Hayakawa, Kenji Kono.
    In IPSJ Technical Report, 2008-OS-109, pp. 17–24, Aug. 2008.
  • Live Migration of Virtual Machines by Exploiting Layer-7 Protocol Context.
    Yutaka Ishikawa, Hiroshi Yamada, Masato Asahara, Miyuki Hanaoka, Kenji Kono.
    In IPSJ Technical Report, 2008-OS-109, pp. 117–124, Aug. 2008.
  • Efficient Consistency Algorithm by Speculating the Location of the Contents on Peer-to-Peer Distributed Servers.
    Ai Hayakawa, Masato Asahara, Toshinori Kojima, Kenji Kono.
    In IPSJ Technical Report, 2008-OS-109, pp. 125–132, Aug. 2008.
  • An Environment for Developing Overlay Networks with Latency Fluctuation.
    Akio Shimada, Masato Asahara, Kenji Kono.
    In IPSJ Technical Report, 2007-OS-106, pp. 119–126, Aug. 2007.
  • Repositioning Replica-Servers based on Demand Fluctuation.
    Masato Asahara, Akio Shimada, Hiroshi Yamada, Kenji Kono.
    In IPSJ Technical Report, 2007-OS-105, pp. 123–130, Apr. 2007.
  • Repositioning Replica in Content Delivery Network based on Demand Fluctuation.
    Masato Asahara, Akio Shimada, Hiroshi Yamada, Kenji Kono.
    In IPSJ Technical Report, 2006-OS-102, pp. 85–92, May 2006.

Invited Talks

  • LoadAtomizer: A Locality and I/O Load aware Task Scheduler for MapReduce.
    2012 Young researchers workshop (The Japan Society for Industrial and Applied Mathematics (JSIAM)), Dec. 2012.

Service

  • Member of the Program Committee for IPSJ ComSys 2013
  • Member of the Program Committee for IPSJ ComSys 2012
  • Member of the Steering Committee for IPSJ SIGOS (2012–)

Awards and Honors

  • IPSJ Digital Courier Funai Young Researcher Encouragement Award (The Funai Foundation for Information Technology, Mar. 2009)

Degrees

  • March 2011, Doctor of Engineering, Keio University
  • March 2007, Master of Engineering, Keio University
  • March 2005, Bachelor of Engineering, The University of Electro-communications

Lecture Notes