From: Michael Monnerie <michael.monnerie@is.it-management.at>
To: xfs@oss.sgi.com
Subject: Re: Calculating swidth On A RAID6 Volume
Date: Tue, 20 Jul 2010 17:00:51 +0200 [thread overview]
Message-ID: <201007201700.51977@zmi.at> (raw)
In-Reply-To: <20100720164444.4c1cef88@harpe.intellique.com>
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On Dienstag, 20. Juli 2010 Emmanuel Florac wrote:
> > so a sunit value of 512 would mean 256KB stripe size which
> > is correct :-)
>
> exactly. Or use su and sw to specify the size in k, m, etc.
Ah, I remember the difference now, that's why I use su= and sw=. This
mix of different units is... irritating.
I corrected the FAQ now to use su+sw:
http://xfs.org/index.php/XFS_FAQ#Q:_How_to_calculate_the_correct_sunit.2Cswidth_values_for_optimal_performance
And I mentioned "swidth" and "sunit" in a sentence in the end.
I'd say using su+sw is more future proof than swidth+sunit, as 4K sector
drives will become standard, and then using 512B units will be outdated
anyway, right? And using su+sw seems simpler to me to explain. YMMV,
--
mit freundlichen Grüssen,
Michael Monnerie, Ing. BSc
it-management Internet Services
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next prev parent reply other threads:[~2010-07-20 14:57 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-20 12:06 Calculating swidth On A RAID6 Volume Andrew Debenham
2010-07-20 12:40 ` Michael Weissenbacher
2010-07-20 13:22 ` Michael Monnerie
2010-07-20 14:13 ` Michael Weissenbacher
2010-07-20 14:44 ` Emmanuel Florac
2010-07-20 15:00 ` Michael Monnerie [this message]
2010-07-20 15:27 ` Emmanuel Florac
2010-07-21 6:54 ` Dave Chinner
2010-07-20 15:04 ` Michael Monnerie
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