https://github.com/sonots/fadvise

This is a forked version of http://net.doit.wisc.edu/~plonka/fadvise/
https://github.com/sonots/fadvise

Last synced: about 2 months ago
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This is a forked version of http://net.doit.wisc.edu/~plonka/fadvise/

• Host: GitHub
• URL: https://github.com/sonots/fadvise
• Owner: sonots
• License: gpl-2.0
• Created: 2013-07-31T07:18:58.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2013-07-31T07:28:40.000Z (over 11 years ago)
• Last Synced: 2024-10-13T08:08:51.998Z (3 months ago)
• Size: 121 KB
• Stars: 1
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README
  • License: COPYING

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README

        
fadvise is a command used to give file advisory information to the operating system.

Its "don't need" option (fadvise --dontneed) is particularly useful to cause the files' pages (blocks) to be evicted from the buffer-cache.

Here is some sample output:

$ fadvise --verbose --dontneed foo.rrd

page size: 4096

foo.rrd: no incore pages.

And the usage information:

Usage:

    fadvise [options] file [...]

     Options:

      -help - brief help message

      -man - full documentation

      -sequential

      -random

      -willneed

      -dontneed

      -noreuse

      -normal (default)

      -offset=n

      -length=n

      -verbose

      -noverbose

The fadvise command was introduced in the paper, "Application Buffer-Cache Management for Performance: Running the World's Largest MRTG", that appears in the proceedings of the LISA 2007 conference in Dallas, November, 2007.

It is available online here: 

http://www.usenix.org/events/lisa07/tech/plonka.html

You may also be interested in the related fincore command.