From: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
To: Austin S Hemmelgarn <ahferroin7@gmail.com>,
"linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: slowdown after one week
Date: Mon, 13 Jul 2015 14:54:32 +0200 [thread overview]
Message-ID: <55A3B508.7070500@profihost.ag> (raw)
In-Reply-To: <55A39F10.5040304@gmail.com>
Am 13.07.2015 um 13:20 schrieb Austin S Hemmelgarn:
> On 2015-07-11 02:46, Stefan Priebe wrote:
>> Hi,
>>
>> while using a 40TB btrfs partition for VM backups. I see a massive
>> slowdown after around one week.
>>
>> The backup task takes usally 2-3 hours. After one week it takes 20
>> hours. If i umount and remount the btrfs volume it takes 2-3 hours again.
>>
>> Kernel 4.1.1
>>
> I've been seeing similar (although much less drastic) slowdowns over
> time myself pretty much since I started using BTRFS (IIRC, sometime
> around 3.16). If you're not constantly writing to that backup volume,
> you might want to consider setting up automounting for it.
>
Yes but that's awful. it's a bug. It would be very nice if someone
involved in the btrfs development can comment on that one.
prev parent reply other threads:[~2015-07-13 12:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-11 6:46 slowdown after one week Stefan Priebe
2015-07-13 11:20 ` Austin S Hemmelgarn
2015-07-13 12:54 ` Stefan Priebe - Profihost AG [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=55A3B508.7070500@profihost.ag \
--to=s.priebe@profihost.ag \
--cc=ahferroin7@gmail.com \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox