Log-structured file system

A log-structured filesystem is a file system in which data and metadata are written sequentially to a circular buffer, called a log. The design was first proposed in 1988 by John K. Ousterhout and Fred Douglis and first implemented in 1992 by Ousterhout and Mendel Rosenblum for the Unix-like Sprite distributed operating system.

This article is about the general concept of log-structured file systems. For the NetBSD file system, see Log-structured File System (BSD). For the Linux log-structured Flash file system, see LogFS.
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