From: Charles Cazabon <charlesc-lists-btrfs@pyropus.ca>
To: btrfs list <linux-btrfs@vger.kernel.org>
Subject: Re: Oddly slow read performance with near-full largish FS
Date: Wed, 24 Dec 2014 21:18:47 -0600 [thread overview]
Message-ID: <20141225031847.GC5864@pyropus.ca> (raw)
In-Reply-To: <54977E50.7000109@jp.fujitsu.com>
Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com> wrote:
>
> In addition, to confirm whether this problem is caused only by
> Btrfs or not, the following way can be used.
>
> 1. preparing the extra storage,
> 2. copy Btrfs's data into int by dd if=<LVM volume> of=<extra storage>
> 3. Use it and confirm whether this problem still happen or not
I've already copied the ~16TB of data from the btrfs filesystem to an XFS
filesystem. I do not see the performance variability under xfs that I see
under btrfs.
> However, since the size of your Btrfs is quite large, I guess you
> can't do it. If you have such extra storage, you've already
> embed it to Btrfs.
Actually, I decided to move to xfs, at least for now. Apparently not many
people are using btrfs with filesystems >15TB, so it seems I'm in more-or-less
uncharted territory, at least according to the responses I've gotten when
looking into this issue.
Charles
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Charles Cazabon
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prev parent reply other threads:[~2014-12-25 3:14 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-17 2:42 Oddly slow read performance with near-full largish FS Charles Cazabon
2014-12-19 8:58 ` Satoru Takeuchi
2014-12-19 16:58 ` Charles Cazabon
2014-12-19 17:33 ` Duncan
2014-12-20 8:53 ` Chris Murphy
2014-12-20 10:03 ` Robert White
2014-12-20 10:57 ` Robert White
2014-12-21 16:32 ` Charles Cazabon
2014-12-21 21:32 ` Robert White
2014-12-21 22:53 ` Charles Cazabon
2014-12-22 0:38 ` Robert White
2014-12-25 3:14 ` Charles Cazabon
2014-12-22 14:16 ` Austin S Hemmelgarn
2014-12-25 3:15 ` Charles Cazabon
2014-12-22 2:13 ` Satoru Takeuchi
2014-12-25 3:18 ` Charles Cazabon [this message]
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