From: Dave Chinner <david@fromorbit.com>
To: Ryan Lee <ryanlee.lahk@gmail.com>
Cc: xfs@oss.sgi.com
Subject: Re: [QUESTION] Too much time to delete file on xfs filesystem
Date: Tue, 19 Jun 2012 12:03:41 +1000 [thread overview]
Message-ID: <20120619020341.GK25389@dastard> (raw)
In-Reply-To: <CABF-5Wryz4QXMzDb12zViPytSEi67Tm0ZwPkYLJaCbDix+91fg@mail.gmail.com>
On Tue, Jun 19, 2012 at 09:45:28AM +0900, Ryan Lee wrote:
> Hi, My name is Ryan.
>
> Nowadays, Our company product has a new problem which is taking too much
> time to delete file on xfs filesystem.
>
> When I try to delete the file (18GByte, It was just one file), it would
> take around 7 minutes 30 seconds.
It's fragmented, isn't it? Run 'xfs_bmap -vp <file>' and count the
extents. If that fails because of ENOMEM errors, run 'xfs_io -f -c
stat <file>' to see what the count of extents is. if the result is
in the thousands, then that is the reason for it being slow.
> # time rm hdd_write_test6.ts
Hmmm - a loopback filesystem image that was written to randomly?
Perhaps you should preallocate the file before running the write
test....
> kernel 2.6.37
A current kernel (e.g. 3.4) will be significantly faster at removing
fragmented files than 2.6.37. Consider upgrading.
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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prev parent reply other threads:[~2012-06-19 2:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-19 0:45 [QUESTION] Too much time to delete file on xfs filesystem Ryan Lee
2012-06-19 2:03 ` Dave Chinner [this message]
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