Log-structured File System (BSD)
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This article is about the NetBSD file system. For the general concept, see log-structured file system.
The Log-Structured File System (or LFS) is an implementation of a log-structured file system (a concept originally proposed and implemented by John Ousterhout), originally developed for BSD. It was removed from FreeBSD and OpenBSD; the NetBSD implementation was nonfunctional until work leading up to the 4.0 release made it viable again as a production file system.[1]