linux-kernel - Ext3 vs NTFS performance

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Message-ID: <B326D0531AF1BA48B4C1E9EBA239A050033DB3C1@scsmsx412.amr.corp.intel.com>
Date:	Tue, 1 May 2007 13:43:18 -0700
From:	"Cabot, Mason B" <mason.b.cabot@...el.com>
To:	<linux-kernel@...r.kernel.org>
CC:	"Cabot, Mason B" <mason.b.cabot@...el.com>
Subject: Ext3 vs NTFS performance

Hello all,

I've been testing the NAS performance of ext3/Openfiler 2.2 against
NTFS/WinXP and have found that NTFS significantly outperforms ext3 for
video workloads. The Windows CIFS client will attempt a poor-man's
pre-allocation of the file on the server by sending 1-byte writes at
128K-byte strides, breaking block allocation on ext3 and leading to
fragmentation and poor performance. This will happen for many
applications (including iTunes) as the CIFS client issues these
pre-allocates under the application layer.

I've posted a brief paper on Intel's OSS website
(http://softwarecommunity.intel.com/articles/eng/1259.htm). Please give
it a read and let me know what you think. In particular, I'd like to
arrive at the right place to fix this problem: is it in the filesystem,
VFS, or Samba?

thanks,
Mason 

(please CC responses to mason dot b dot cabot at intel dot com)
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