From: Austin S Hemmelgarn <ahferroin7@gmail.com>
To: Stefan Priebe <s.priebe@profihost.ag>,
"linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: slowdown after one week
Date: Mon, 13 Jul 2015 07:20:48 -0400 [thread overview]
Message-ID: <55A39F10.5040304@gmail.com> (raw)
In-Reply-To: <55A0BBD7.5000400@profihost.ag>
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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.
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next prev parent reply other threads:[~2015-07-13 11:20 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 [this message]
2015-07-13 12:54 ` Stefan Priebe - Profihost AG
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