Limin Wang Assistant Professor EECS Department, Case Western Reserve University 10900 Euclid Avenue, Cleveland, OH 44106 Office: 516 Olin Building Phone: (216) 368-4663 Fax:     (216) 368-6039 E-mail: lmwang AT case.edu or lmwang AT eecs.cwru.edu

Short Bio

Teaching

Research

Publications

Short Bio

Teaching

• Fall 2005 EECS 338: Introduction to Operating System
• Spring 2005 EECS 325: Computer Networks I

Research

   Interests

• Robustness and Performance of Network Services, DDoS protection
• Large scale distributed systems---Content Distribution Network, P2P, distributed storage system.
• Communication Protocols, Congestion Control
• Large scale network simulation/testbed evaluation

   Recent Projects

• [CoDeeN - A CDN on PlanetLab]
• [Robust Networks]
  • Explored the design space of request redirection strategies in Content Distribution Networks (CDNs). Proposed new algorithms that balance server load, locality and network proximity, achieving large improvement in system capacity over published CDN technology, while maintaining response latency low. Developed a new strategy unified with normal request handling to deal with flash crowds and Distributed Denial of Service (DDoS) attacks.
    Project Links: [Robust CDN]
  • Designed and implemented a novel hybrid network-server simulator by combining NS-2 and Logsim. This simulator provides detailed model at both packet level and operating system level. Conducted detailed large scale simulations to evaluate different CDN request redirection schemes.
  • Used a duality model to study TCP Vegas as a distributed optimization problem, provided insights on how and why TCP Vegas achieves its resource utilization, smoothness and fairness properties. Also investigated remedies for Vegas' buffer occupancy problem.
    Related Links: [Vegas+REM: ns-2 code and Package Tar file]

Recent Publications

• Limin Wang, Kyoungsoo Park, Ruoming Pang, Vivek Pai and Larry Peterson. Reliability and Security in the CoDeeN Content Distribution Network. In Proceedings of the USENIX 2004 Annual Technical Conference, Boston, MA (June 2004), to appear.
• Vivek Pai, Limin Wang, Kyoungsoo Park, Ruoming Pang and Larry Peterson. The Dark Side of the Web: An Open Proxy's View. In Second Workshop on Hot Topics in Networks HotNets-II, Cambridge, MA (November 2003).
• Limin Wang, Vivek Pai and Larry Peterson. The Effectiveness of Request Redirection on CDN Robustness. In Proceedings of the Fifth Symposium on Operating Systems Design and Implementation (OSDI'02), Boston, MA, December 2002.
• Steven Low, Larry Peterson and Limin Wang. Understanding TCP Vegas: A Duality Model. Journal of the ACM (JACM) 49(2):207-235, (March 2002). [ps, pdf]
• Steven Low, Larry Peterson and Limin Wang. Understanding TCP Vegas: A Duality Model. In Proceedings of SIGMETRICS 2001 . (June 2001). [ps, pdf]
• Limin Wang, Fred Douglis and Michael Rabinovich. Forwarding Requests Among Reverse Proxies. The 5th International Web Caching and Content Delivery Workshop, Poster Session. (May 2000) Also apear as AT&T Research Technical Report TD-4LKK5L. [ps] [pdf] [html]
• Yuanyuan Zhou, Limin Wang, Douglas W. Clark, and Kai Li. Thread Scheduling for Out-of-core Applications with Memory Server on Multicomputers. In Proceedings of the 6th Workshop on I/O in Parallel and Distributed Systems, IOPADS '99 . (May 1999) [ps]