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

To: Yusuf Goolamabbas <yusufg@xxxxxxxxxxxx>
Subject: Re: synctest results on xfs/ext3(htree) on 2.6.5-rc3-mm4
From: Steve Lord <lord@xxxxxxx>
Date: Fri, 02 Apr 2004 08:29:52 -0600
Cc: linux-xfs@xxxxxxxxxxx, akpm@xxxxxxxx
In-reply-to: <20040402141138.GB26499@xxxxxxxxxxxx>
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Yusuf Goolamabbas wrote:

>>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

Thats somewhat of a relief, we should be able to get closer to ext3 than 
but at least it puts us in the same ballpark.

>Can't tell you about disk noise now, doing the test remotely. I'll try
>to listen in on Monday
That's OK, if our 2 week old lets me I might be able to try ext3 myself, 
just a
matter of being able to get to the basement ;-)


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