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Re: [Evms-devel] XFS + evms + x86_64 + network hangs...

To: Jan De Landtsheer <jan@xxxxxxxxxxxx>
Subject: Re: [Evms-devel] XFS + evms + x86_64 + network hangs...
From: Nathan Scott <nathans@xxxxxxx>
Date: Thu, 3 Jun 2004 09:46:31 +1000
Cc: Hendrik Visage <hvisage@xxxxxxxxxxxxxx>, Jord Tanner <jord@xxxxxxxxxxxxx>, evms-devel@xxxxxxxxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxx
In-reply-to: <1086166167.19803.252.camel@Jan-DEV.dct.be>; from jan@dct-mail.com on Wed, Jun 02, 2004 at 10:49:28AM +0200
References: <40BB48A3.1050205@indygecko.com> <20040601083234.GB4347@hvs.envisage.co.za> <20040601193038.A999249@wobbly.melbourne.sgi.com> <1086085280.19799.45.camel@Jan-DEV.dct.be> <20040602081013.GB32633@frodo> <1086166167.19803.252.camel@Jan-DEV.dct.be>
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Hi Jan,

On Wed, Jun 02, 2004 at 10:49:28AM +0200, Jan De Landtsheer wrote:
> Hi all, Nathan.
> Included you'll find a little python script that just breaks the FS in a
> matter of seconds. 

Thanks... I've run it for half an hour on a raid5 device (on 2.6.6)
and it was still chugging away when I interrupted it.  Unmounted,
ran check/repair and no problems found... hmm.

Repeated on just a regular scsi disk and also no problems so far.

> We are a data shop, we eat disks for breakfast, lunch and dinner. For

Mmmm, tasty. :)

> some testing purposes, I created a little script for filling 2-5-10 TB

Oh.  So - you're testing this with CONFIG_LBD enabled I assume;
does it fail on small devices (several gigabytes for example)?
You can use -dsize=10g for example to restrict mkfs.xfs to making
a smaller filesystem.  There are known device driver issues with
multi-terabyte MD devices in current kernels, and I suppose the
same sorts of issues may still be lurking in other drivers too.

Thanks for all the help.



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