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From: Andrew Klaassen <ak@spinpro.com>
To: xfs@oss.sgi.com
Subject: External log size limitations
Date: Wed, 16 Feb 2011 13:54:47 -0500	[thread overview]
Message-ID: <4D5C1D77.1060000@spinpro.com> (raw)

Hi all,

I found some this document:

http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?coll=linux&db=bks&fname=/SGI_Admin/LX_XFS_AG/ch02.html

...which says that an XFS external log is limited to 128MB.

Is there any way to make that larger?

Goal:  I'd love to try putting the external log on an SSD that could 
sustain two or three minutes of steady full-throttle writing.  128MB 
gives me less than a second worth of writes before my write speed slows 
down to the underlying storage speed.

I'll do lots of benchmarks before rolling it out to make sure it 
actually does help, of course.  I just want to know if it's possible, 
and how to do it if it is.

Thanks.

Andrew



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             reply	other threads:[~2011-02-16 18:57 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-16 18:54 Andrew Klaassen [this message]
2011-02-17  0:32 ` External log size limitations Dave Chinner
2011-02-18 15:26   ` Andrew Klaassen
2011-02-18 19:55     ` Stan Hoeppner
2011-02-18 20:31       ` Andrew Klaassen
2011-02-19  3:53         ` Stan Hoeppner
2011-02-19 10:02           ` Matthias Schniedermeyer
2011-02-19 20:33             ` Stan Hoeppner
2011-02-19 21:47               ` Emmanuel Florac
2011-02-20 21:14     ` Dave Chinner

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