From owner-freebsd-fs  Thu Sep 21  9:42:42 2000
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To: Dwight Tuinstra <tuinstra@clarkson.edu>
Cc: freebsd-fs <freebsd-fs@FreeBSD.ORG>
Subject: Re: Journaling Filesystems in bsd? (LFS, anyone?) 
In-reply-to: Your message of "Thu, 21 Sep 2000 11:18:47 EDT."
             <39CA26D7.51D314BF@clarkson.edu> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Thu, 21 Sep 2000 09:38:12 -0700
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>There has been controversy regarding the performance claims
>of LFS under various disk activity patterns.  The research I'll be 
>doing aims to investigate the claims, especially after implementing 
>the optimizations proposed by Matthews et al (Improving the 
>Performance of Log-Structured File Systems With Adaptive Methods; 
>Proc. Sixteenth ACM Symposium on Operating System Principles).  
>Dr. Matthews is my advisor on this research. 
>
>Is there any interest in porting/redesigning LFS for FreeBSD?

   Have you done any comparisons with FFS+softupdates? The goal of softupdates
was to be as fast or faster than LFS for everything, not require a cleanerd,
and along with "snapshots" eliminate requiring fsck before system startup.

-DG

David Greenman
Co-founder, The FreeBSD Project - http://www.freebsd.org
President, TeraSolutions, Inc. - http://www.terasolutions.com
Pave the road of life with opportunities.


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