Learn More
A reimplementation of the UNIX file system is described. The reimplementation provides substantially higher throughput rates by using more flexible allocation policies that allow better locality of reference and can be adapted to a wide range of peripheral and processor characteristics. The new file system clusters data that is sequentially accessed and(More)
Research results [ROSE91] demonstrate that a log-structured file system (LFS) 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 [ROSE91] log-structured file system that is more robust(More)
Large complex programs are composed of many small routines that implement abstractions for the routines that call them. To be useful, an execution profiler must attribute execution time in a way that is significant for the logical structure of a program as well as for its textual decomposition. This data must then be displayed to the user in a convenient(More)
Traditionally, recovery of a BSD fast filesystem after an uncontrolled system crash such as a power failure or a system panic required the use of the filesystem checking program, ''fsck''. Because the filesystem cannot be used while it is being checked by ''fsck'', a large server may experience unacceptably long periods of unavailability after a crash.(More)