From: Dave Chinner <david@fromorbit.com>
To: Mark Seger <mjseger@gmail.com>
Cc: Nathan Scott <nathans@redhat.com>, xfs@oss.sgi.com
Subject: Re: definitions for /proc/fs/xfs/stat
Date: Sun, 16 Jun 2013 10:11:30 +1000 [thread overview]
Message-ID: <20130616001130.GE29338@dastard> (raw)
In-Reply-To: <CAC2B=ZGgr5WPWOEehHDHKekM8yHgQ3QS4HMzM8+j217AfEoPyQ@mail.gmail.com>
On Sat, Jun 15, 2013 at 12:22:35PM -0400, Mark Seger wrote:
> I was thinking a little color commentary might be helpful from a
> perspective of what the functionally is that's driving the need for
> fallocate. I think I mentioned somewhere in this thread that the
> application is OpenStack Swift, which is a highly scalable cloud object
> store.
I'm familiar with it and the problems it causes filesystems. What
application am I talking about here, for example?
http://oss.sgi.com/pipermail/xfs/2013-June/027159.html
Basically, Swift is trying to emulate Direct IO because python
does't support Direct IO. Hence Swift is hacking around that problem
and causing secondary issues that would never have occurred if
Direct IO was used in the first place.
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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next prev parent reply other threads:[~2013-06-16 0:11 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-14 16:37 definitions for /proc/fs/xfs/stat Mark Seger
2013-06-14 22:16 ` Nathan Scott
2013-06-14 22:37 ` Mark Seger
2013-06-15 0:17 ` Nathan Scott
2013-06-15 1:55 ` Mark Seger
2013-06-15 2:04 ` Dave Chinner
2013-06-15 10:35 ` Mark Seger
2013-06-15 16:22 ` Mark Seger
2013-06-16 0:11 ` Dave Chinner [this message]
2013-06-16 12:58 ` Mark Seger
2013-06-16 22:06 ` Dave Chinner
2013-06-16 22:31 ` Mark Seger
2013-06-16 23:14 ` Dave Chinner
2013-06-16 23:31 ` Mark Seger
2013-06-17 1:11 ` Nathan Scott
2013-06-17 2:46 ` Dave Chinner
2013-06-17 5:41 ` Nathan Scott
2013-06-17 10:57 ` Mark Seger
2013-06-17 11:13 ` Dave Chinner
2013-06-17 14:57 ` Mark Seger
2013-06-17 20:28 ` Stefan Ring
2013-06-18 0:15 ` Dave Chinner
2013-06-18 10:17 ` Mark Seger
2013-06-19 23:02 ` Useful stats (was Re: definitions for /proc/fs/xfs/stat) Nathan Scott
2013-06-17 11:19 ` definitions for /proc/fs/xfs/stat Dave Chinner
2013-06-17 13:18 ` Stan Hoeppner
2013-06-18 0:13 ` Mark Goodwin
2013-06-16 0:00 ` Dave Chinner
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