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From: <Ivan.Novick@emc.com>
To: xfs@oss.sgi.com
Cc: Timothy.Heath@emc.com
Subject: allocsize mount option
Date: Tue, 28 Sep 2010 14:53:46 -0400	[thread overview]
Message-ID: <C8C787CA.44AA%ivan.novick@emc.com> (raw)

Hi all,

According to the documentation the allocsize mount option: "Sets the
buffered I/O end-of-file preallocation size when doing delayed allocation
writeout"

Will this value limit "extent" sizes to be be no smaller than the allocsize?

I have set the following mount options:
(rw,noatime,nodiratime,logbufs=8,allocsize=512m)

And yet, depending on the workload, the extent sizes are often 1 or 2 orders
of magnitude lower than 512 MB ...

If I wanted to do further reading on the subject, can someone point me to an
approximate location in the code where the size of a newly created extent is
determined?

Cheers,
Ivan Novick

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             reply	other threads:[~2010-09-28 18:52 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-28 18:53 Ivan.Novick [this message]
2010-09-29  0:31 ` allocsize mount option Dave Chinner
  -- strict thread matches above, loose matches on Subject: below --
2011-01-20 20:41 Peter Vajgel
2011-01-21  0:48 ` Dave Chinner
2010-01-24  6:44 Gim Leong Chin
2010-01-15  3:08 Gim Leong Chin
2010-01-14 17:25 Gim Leong Chin
2010-01-14 17:42 ` Eric Sandeen
2010-01-14 23:28 ` Dave Chinner
2010-01-13  9:42 Gim Leong Chin
2010-01-13 10:50 ` Dave Chinner
2010-01-11 17:25 Gim Leong Chin
2010-01-11 18:16 ` Eric Sandeen

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