Date Added: Jan 2011
Web proxy caching servers play a key role in today's Web infrastructure. Previous studies have shown that disk I/O is one of the major performance bottlenecks of proxy servers. Most conventional file systems do not work well for proxy server workloads and have high overheads. This paper presents a novel, User-space, Customized File System called UCFS that can drastically improve I/O performance of proxy servers. UCFS is a user-level software component of a proxy server which manages data on a raw disk or disk partition. Since the entire system runs in the user space, it is easy and inexpensive to implement. It also has good portability and maintainability.