William Jannen

William Jannen is an Associate Professor in the Department of Computer Science at Williams College. His research focuses on file systems and storage, with an emphasis on write-optimized data structures and storage stack improvements. He is a key contributor to the development of BetrFS, a Linux file system built using Bε-trees.

• Education:
  • Ph.D. in Computer Science from Stony Brook University (2017)
  • B.A. in Computer Science from Williams College (2009)
• Research Interests:
  • Design and analysis of write-optimized file systems
  • Block layer translation for shingled magnetic recording drives
  • Application layer query models for read optimization
  • RNA secondary structure prediction (past work)
• Key Projects:
  • BetrFS: A write-optimized Linux file system
  • OSCAR Lab (now at UNC Chapel Hill): Library operating system virtualization
  • RNA visualization tools: RNAbows, Bindigo, Nestor

Teaching: Courses include Introduction to Computer Science (CSCI 134), Algorithm Design (CSCI 256), and Storage Systems (CSCI 333). He has also taught advanced courses like Game Analysis & Aesthetics (CSCI 498).