From: Phillip Susi <psusi@ubuntu.com>
To: "Joseph D. Wagner" <joe@josephdwagner.info>
Cc: linux-ext4@vger.kernel.org
Subject: Re: dump ext4 performance degrades linearly as disk fills
Date: Tue, 29 Jul 2014 16:55:27 -0400 [thread overview]
Message-ID: <53D80A3F.5010807@ubuntu.com> (raw)
In-Reply-To: <d5c373beb24a9da86986ea43afe13594@josephdwagner.info>
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On 6/19/2014 2:42 PM, Joseph D. Wagner wrote:
> Hello Theo.
>
> I know you're working-for-free and have other things to do besides
> work on my low priority problem. However, I haven't heard from
> you. I just wanted to follow-up and make sure you got my
> attachment, not that anything fell through the cracks so-to-speak.
Just thought I'd suggest two things you might try:
1) dump to /dev/null to make sure it is a read problem, and not a
problem writing the output file.
2) You might try throwing e2defrag at the fs and see if that helps (
after a full backup of course ). In the past I have seen significant
slowness when dumping due to my Maildir being fragmented all to hell.
If you have any sets of large numbers of relatively small files, that
could be what you are seeing. An e2defrag pass will completely clear
this up.
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next prev parent reply other threads:[~2014-07-29 20:55 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-19 18:42 dump ext4 performance degrades linearly as disk fills Joseph D. Wagner
2014-06-21 0:38 ` Theodore Ts'o
2014-07-29 20:55 ` Phillip Susi [this message]
2014-07-29 22:48 ` Joseph D. Wagner
-- strict thread matches above, loose matches on Subject: below --
2014-06-20 23:59 Joseph D. Wagner
2014-06-16 5:43 Joseph D. Wagner
2014-06-16 12:42 ` Theodore Ts'o
2014-06-17 14:08 ` Joseph D. Wagner
2014-06-17 14:51 ` Theodore Ts'o
2014-06-16 21:48 ` Andreas Dilger
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