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From: Eric Sandeen <sandeen@sandeen.net>
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: xfs@oss.sgi.com
Subject: Re: Anyone using XFS in production on > 20TiB volumes?
Date: Thu, 23 Dec 2010 15:12:55 -0600	[thread overview]
Message-ID: <4D13BB57.80309@sandeen.net> (raw)
In-Reply-To: <alpine.DEB.2.00.1012231304130.12482@p34.internal.lan>

On 12/23/10 12:06 PM, Justin Piszcz wrote:
> 
> On Thu, 23 Dec 2010, Justin Piszcz wrote:
> 
> 
> Hi,
> 
> How come parted using (optimal at 1mb alignment is slower than no
> partition?  

because parted got it wrong, sounds like.

> In addition, sunit and swidth set properly as mentioned
> earlier appears to be _slower_ than defaults with no partitions.

stripe unit over an incorrectly aligned partition won't help
and I suppose could make it worse.

align your partitions, using sector units, to a stripe width unit.
Set the stripe width properly on the fs on top of that.

-Eric
 
> 
> http://home.comcast.net/~jpiszcz/20101223/final.html
> 
> Justin.
> 

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  parent reply	other threads:[~2010-12-23 21:10 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-12-22 16:30 Anyone using XFS in production on > 20TiB volumes? Justin Piszcz
2010-12-22 16:56 ` Emmanuel Florac
2010-12-22 19:03   ` Eric Sandeen
2010-12-23  0:26     ` Emmanuel Florac
2010-12-23  0:28       ` Justin Piszcz
2010-12-23  0:56         ` Dave Chinner
2010-12-23  9:43           ` Justin Piszcz
2010-12-23 12:03             ` Emmanuel Florac
2010-12-23 18:06             ` Justin Piszcz
2010-12-23 18:55               ` Emmanuel Florac
2010-12-23 19:07                 ` Justin Piszcz
2010-12-23 19:54                   ` Stan Hoeppner
2010-12-23 21:48                     ` Emmanuel Florac
2010-12-23 23:21                       ` Stan Hoeppner
2010-12-23 21:50                   ` Emmanuel Florac
2010-12-23 22:04                     ` Justin Piszcz
2010-12-23 19:29                 ` Justin Piszcz
2010-12-23 19:58                   ` Stan Hoeppner
2010-12-24  1:01                   ` Stan Hoeppner
2010-12-23 21:12               ` Eric Sandeen [this message]
2010-12-23  1:10         ` Emmanuel Florac
2010-12-22 17:06 ` Chris Wedgwood
2010-12-22 17:10   ` Justin Piszcz
2010-12-22 17:32     ` Chris Wedgwood
2010-12-22 17:35       ` Justin Piszcz
2010-12-22 18:50         ` Chris Wedgwood
2010-12-22 19:24           ` Justin Piszcz

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