Howard Chang-Hao Tsai
蔡彰豪

Ph.D. Candidate
Real-Time Computing Laboratory
Electrical Engineering and Computer Science
University of Michigan

About Me

I am a Ph.D. candidate working with Prof. Kang G. Shin in the Real-Time Computing Laboratory (RTCL) at the Electrical Engineering and Computer Science Department (EECS) of the University of Michigan. I did my undergraduate study in the Electrical Engineering Department of the National Taiwan University.

Research Areas

My current research interests include Internet services, virtualized sytems, cluster computing, distributed systems, and computer networks.

Projects

Virtualization-Based Resource Allocation in Data Centers

Game Servers in Virtualized Infrastructure

Publications

1. Chang-Hao Tsai, Yaoping Ruan, Sambit Sahu, Anees Shaikh, and Kang G. Shin. Virtualization-Based Techniques for Enabling Multi-Tenant Management Tools. 18th IFIP/IEEE International Workshop on Distributed Systems: Operations and Management (DSOM '07), Oct 2007. [pdf] [ppt]
2. Chang-Hao Tsai, Kang G. Shin, John Reumann, and Sharad Singhal. Online Web Cluster Capacity Estimation and its Application to Energy Conservation. IEEE Transactions on Paralled and Distributed Systems, Vol. 18, No. 7, pp. 932-945, July 2007. [pdf]
3. Chang-Hao Tsaiand Kang G. Shin. DPS: A Distributed Proportional-Share Scheduler in Computing Clusters. 2nd IEEE International Workshop on Feedback Control Implementation and Design in Computing Systems and Networks (FeBID '07), May 2007. [pdf] [ppt]
4. Hani Jamjoom, Chang-Hao Tsai, Kang G. Shin, and Sharad Singhal. Eve: A Measurement-Centric Emulation Environment for Adaptive Internet Servers. 10th Communications and Networking Simulation Symposium (CNS '07), March 2007. [pdf] [ppt] (Best Paper Award)
5. Chang-Hao Tsai, Kang G. Shin, John Reumann, and Sharad Singhal. Online Web Cluster Capacity Estimation and its Application to Energy Conservation. 9th IFIP/IEEE International Symposium on Integrated Network Management (IM '05, Application Session), May 2005. [pdf] [ppt]

Patent

1. Yaoping Ruan, Debanjan Saha, Sambit Sahu, Anees Shaikh, and Chang-Hao Tsai. Method, Apparatus and Computer Program Product Implementing Multi-Tenancy for Network Monitoring Tools Using Virtualization Technology.

Other Activities

System Administration

Currently, I manage the computing resources of RTCL, which includes the installation of 16 blades and several PC servers, a variety of OSes (Linux, OpenSolaris, Windows) on top of various virtualization systems (VMware ESX Servers, Xen, OpenVZ), and the integration of LDAP, CIFS, XMPP, OpenVPN, TWiki, and Subversion into our infrastructure.

In addition, I was also responsible for the creation of the first high school Internet connection in Taiwan back in 1995, and the management of a departmental Internet infrastructure (approx. 1,000 nodes) in 1997-1999. During military service, my experience extends to telephone communication systems as well. I also provide IT consulting service for my father's company.

Contact Information

E-mail Address

chtsai (at) umich (dot) edu

School Address

4956 CSE
2260 Hayward Street
Ann Arbor, Michigan 48109-2121
734 763-4138
734 763-8094 fax

Last updated: $Date: 2008-04-04 22:52:06 -0400 (Fri, 04 Apr 2008) $