linux-ext4 - seekwatcher IO visualization

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Message-ID: <20070809205355.GB6689@schatzie.adilger.int>
Date:	Thu, 9 Aug 2007 14:53:55 -0600
From:	Andreas Dilger <adilger@...sterfs.com>
To:	"Jose R. Santos" <jrs@...ibm.com>
Cc:	linux-ext4@...r.kernel.org
Subject: seekwatcher IO visualization

I saw on #linuxfs today some graphs and movies by Chris Mason showing
the poor IO locality for ext3 compared to btrfs and XFS.  It would be
interesting to run this with ext4+mballoc+delalloc, and a separate
one with the FLEXBG feature enabled to see how that improves the
seeking/locality.

http://oss.oracle.com/~mason/seekwatcher/

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

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