From: Dave Chinner <david@fromorbit.com>
To: hank peng <pengxihan@gmail.com>
Cc: linux-xfs@oss.sgi.com
Subject: Re: how to increase speed to iterate all file's name in a XFS , about million files.
Date: Wed, 29 Sep 2010 11:01:32 +1000 [thread overview]
Message-ID: <20100929010132.GJ5665@dastard> (raw)
In-Reply-To: <AANLkTimnxM_cqYAR6LK3foeZJ=sz5Xn7vm6uXeXHR_Ew@mail.gmail.com>
On Wed, Sep 29, 2010 at 08:55:08AM +0800, hank peng wrote:
> 2010/9/29 Dave Chinner <david@fromorbit.com>:
> > On Wed, Sep 29, 2010 at 08:28:08AM +0800, hank peng wrote:
> >> Hi:
> >> I have a XFS file system which contains about million files in it. I
> >> want to iterate all file's name using readdir function and I found
> >> that a little time-consuming.
> >> Anybody to suggest a way to increase its speed?
> >
> > In what way was it time consuming? IO bound? CPU bound? something
> > else?
> >
> I think it is IO bound,
Can you post the output of 'iostat -x -m 5' while the readdir is in
progress so we can determine if that is true or not?
> file names information is scattered in whole
> partition, right?
No, not usually.
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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prev parent reply other threads:[~2010-09-29 1:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-29 0:28 how to increase speed to iterate all file's name in a XFS , about million files hank peng
2010-09-29 0:48 ` Dave Chinner
2010-09-29 0:55 ` hank peng
2010-09-29 1:01 ` Dave Chinner [this message]
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