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Re: synctest results on xfs/ext3(htree) on 2.6.5-rc3-mm4

To: Steve Lord <lord@xxxxxxx>
Subject: Re: synctest results on xfs/ext3(htree) on 2.6.5-rc3-mm4
From: Yusuf Goolamabbas <yusufg@xxxxxxxxxxxx>
Date: Fri, 2 Apr 2004 22:11:38 +0800
Cc: linux-xfs@xxxxxxxxxxx, akpm@xxxxxxxx
In-reply-to: <406D6374.5000802@xfs.org>
References: <20040402104436.GA24772@outblaze.com> <406D6374.5000802@xfs.org>
Sender: linux-xfs-bounce@xxxxxxxxxxx
User-agent: Mutt/1.4.2i
> Did you use default mkfs parameters on xfs? Try upping the log size:
> 
>    mkfs -t xfs -f -l size=32768b .....
> 
> Also try
> 
>    mount -o logbufs=8 ....
> The multiple test dirs will make xfs spread out all over the disk,
> not sure how ext3 will place them.  Probably seek heaven, what
> does the disk sound like on ext3, it chatters a lot for xfs.

Big difference

With your mkfs settings and mount options, the same synctest finishes in

real 97.64 user 2.20 sys 30.19

That's close to a 10x difference from the original numbers

Can't tell you about disk noise now, doing the test remotely. I'll try
to listen in on Monday


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