* how to increase speed to iterate all file's name in a XFS , about million files.
@ 2010-09-29 0:28 hank peng
2010-09-29 0:48 ` Dave Chinner
0 siblings, 1 reply; 4+ messages in thread
From: hank peng @ 2010-09-29 0:28 UTC (permalink / raw)
To: linux-xfs
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?
--
The simplest is not all best but the best is surely the simplest!
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* Re: how to increase speed to iterate all file's name in a XFS , about million files.
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
0 siblings, 1 reply; 4+ messages in thread
From: Dave Chinner @ 2010-09-29 0:48 UTC (permalink / raw)
To: hank peng; +Cc: linux-xfs
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?
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: how to increase speed to iterate all file's name in a XFS , about million files.
2010-09-29 0:48 ` Dave Chinner
@ 2010-09-29 0:55 ` hank peng
2010-09-29 1:01 ` Dave Chinner
0 siblings, 1 reply; 4+ messages in thread
From: hank peng @ 2010-09-29 0:55 UTC (permalink / raw)
To: Dave Chinner; +Cc: linux-xfs
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, file names information is scattered in whole
partition, right?
> Cheers,
>
> Dave.
> --
> Dave Chinner
> david@fromorbit.com
>
--
The simplest is not all best but the best is surely the simplest!
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: how to increase speed to iterate all file's name in a XFS , about million files.
2010-09-29 0:55 ` hank peng
@ 2010-09-29 1:01 ` Dave Chinner
0 siblings, 0 replies; 4+ messages in thread
From: Dave Chinner @ 2010-09-29 1:01 UTC (permalink / raw)
To: hank peng; +Cc: linux-xfs
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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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
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2010-09-29 1:01 ` Dave Chinner
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