Subject: Re: Extreme slowness with xfs [WAS: Re: Slowness with new pc]
From: Stian Jordet <liste@jordet.net>
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: linux-kernel@vger.kernel.org, xfs@oss.sgi.com
In-Reply-To: <alpine.DEB.1.10.0811240448570.25866@p34.internal.lan>
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Date: Tue, 25 Nov 2008 00:36:48 +0100
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ma., 24.11.2008 kl. 04.50 -0500, skrev Justin Piszcz:
> While there still may be something else wrong, the first problem I see is 
> your sunit and swidth are set to 0.
> 
> Please read, a good article on what they are and how to set them:
> http://www.socalsysadmin.com/

Oh, this was new to me. But the setting didn't change anything. I can
copy one large file between the xfs and ext3 disk (both ways), and I get
speeds between 160 and 200 MB/s. But unpacking the kernel source takes
between 5 and 10 minutes on the xfs disk, and a mere 15 seconds on the
ext3... (and it also used to take between 5 and 10 minutes when I had
xfs on the raid0, so it doesn't seem to be hardware related...)

If anyone has anything more I can try before I do the lengthy process of
backup 1TB, reformat and restore...

Thanks :)

Regards,
Stian

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