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Re: Question: why does dbench take so much longer to run on XFSthen ext2

To: <linux-xfs@xxxxxxxxxxx>
Subject: Re: Question: why does dbench take so much longer to run on XFSthen ext2 file system
From: "Philip Chiang" <pchiang@xxxxxxxxxxxxxxxxx>
Date: Wed, 16 Jan 2002 15:23:32 -0800
References: <006001c19ee0$aa218170$1701a8c0@xxxxxxxxxxxxxxxxxxxxxxxxxxx> <1011222311.3602.10.camel@xxxxxxxxxxxxxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
sorry, forgot to mention. it not in a raid. the test was done on
a single 40 GB IDE hard drive.


Thanks


----- Original Message -----
From: "Eric Sandeen" <sandeen@xxxxxxx>
To: "Philip Chiang" <pchiang@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, January 16, 2002 3:05 PM
Subject: Re: Question: why does dbench take so much longer to run on XFSthen
ext2 file system


> hi Philip, I should have asked - are you using raid?  If so, make an
> external log that's not part of the raid, and see how that goes.
>
> -Eric
>
> On Wed, 2002-01-16 at 16:53, Philip Chiang wrote:
> > Hi, I am trying to make comparisons between ext2 and xfs file system.
> I ran dbench on my system with 150 clients on the ext2 file system and
> on the xfs file system. I ran this test several times, but the results
> are similar. On xfs, dbench takes 211 mins to finish. Where on ext2, it
> takes 60 mins. I want to ask "why it has such a big difference on the
> two file system?" One more note, when dbench is running on xfs, the
> whole system tag downs, CPU usage is at 99% all the time, is this
> normal?
>
> > I am using:
> > 40 GB IDE hard drives
> --
> Eric Sandeen      XFS for Linux     http://oss.sgi.com/projects/xfs
> sandeen@xxxxxxx   SGI, Inc.
>


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