linux-ext4 - Ext4 test results

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Message-ID: <48A963A9.107@bull.net>
Date:	Mon, 18 Aug 2008 13:57:29 +0200
From:	Celine Bourde <celine.bourde@...l.net>
To:	Mingming Cao <cmm@...ibm.com>
Cc:	linux-ext4@...r.kernel.org,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	jean-pierre.dion@...l.net, frederic.bohe@...l.net,
	SOLOFO RAMANGALAHY <Solofo.Ramangalahy@...l.net>,
	"Jose R. Santos" <jrs@...ibm.com>, celine.bourde@...l.net
Subject: Ext4 test results

Hi all,

I have launch valerie's performance test to compare ext4 evolution from
kernel 2.6.26-rc2 to kernel 2.6.27-rc1.

Both results are available here :
http://www.bullopensource.org/ext4/20080530/ffsb-write-2.6.26-rc2.htm <http://www.bullopensource.org/ext4/20080818-ffsb/ffsb-write-2.6.27-rc1.html>
http://www.bullopensource.org/ext4/20080818-ffsb/ffsb-write-2.6.27-rc1.html

barriers were disabled for this tests.
We could notice significant improvement of number of
extents per file with following cases :

mkfs option : -I 256 -O uninit_groups
mount option : data=writeback, nomballoc

and

mkfs option : -I 256 -O uninit_groups,flex_bg -G 64
mount option : data=writeback, nomballoc

fsck time appears now constant (kernel 2.6.27-rc1).

Cel.







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