linux-ext4 - Re: Ext4 benchmarks

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Message-ID: <20070330185019.GW5967@schatzie.adilger.int>
Date:	Fri, 30 Mar 2007 12:50:20 -0600
From:	Andreas Dilger <adilger@...sterfs.com>
To:	Johann Lombardi <johann.lombardi@...l.net>
Cc:	"Jose R. Santos" <jrs@...ibm.com>,
	Jean-Pierre Dion <jean-pierre.dion@...l.net>,
	linux-ext4@...r.kernel.org
Subject: Re: Ext4 benchmarks

On Mar 30, 2007  10:43 +0200, Johann Lombardi wrote:
> On Wed, Mar 28, 2007 at 09:20:50AM -0500, Jose R. Santos wrote:
> > While it may be to late for the purposes of your OLS paper, one thing 
> > that doesn't seem to be getting much attention is the performance of a 
> > file system while doing many meta-data operations or throughput testing 
> > during heavy journal log activity.
> 
> Back in 2005, Alex sent a patch to monitor journal activity through procfs:
> http://marc.info/?l=linux-ext4&m=113538565128617&w=2
> 
> We have been using this patch for more than 1 year and it is very useful
> for investigating performance issues.
> Does anybody know why this patch hasn't found its way into the mainline?
> Maybe it could be merged in jbd2?

Yes, we use this functionality failry often, so having it in jbd2 would
be quite useful.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

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