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Research results demonstrate that a log-structured file system
offers the potential for dramatically improved write performance,
faster recovery time, and faster file creation and deletion than
traditional UNIX file systems. This paper presents a redesign and
implementation of the Sprite log-structured file system that is
more robust and integrated into the vnode interface. Measurements
show its performance to be superior to the 4BSD Fast File System
in a variety of benchmarks and not significantly less than FFS in
any test. Unfortunately, an enhanced version of FFS (with read and
write clustering) provides comparable and sometimes superior
performance to our LFS. However, LFS can be extended to provide
additional functionality such as embedded transactions and versioning,
not easily implemented in traditional file systems.
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