linux-kernel - Re: Treat disk space like memory space

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Date:	Thu, 15 Nov 2007 18:03:16 -0600
From:	Wes Felter <wesley@...ter.org>
To:	linux-kernel@...r.kernel.org
Subject:  Re: Treat disk space like memory space

Stefan Monnier wrote:

> So I'd like to be able to say "these areas of my file-system hold data
> that you can discard whenever you need space".  So I can freely fill up
> my disk with such irrelevant data, safe in the knowledge that if I ever
> need this disk space it'll be automatically reclaimed.

James Cipar, Mark D. Corner, Emery D. Berger: TFS: A Transparent File 
System for Contributory Storage.

"TFS provides background tasks with large amounts of unreliable 
storage-all of the currently available space-without impacting the 
performance of ordinary file access operations."

http://www.usenix.org/event/fast07/tech/cipar.html
http://prisms.cs.umass.edu/tcsm/

It's intended for P2P but I could imagine using it for caches.

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