From: Austin S Hemmelgarn <ahferroin7@gmail.com>
To: Timothy Normand Miller <theosib@gmail.com>
Cc: Btrfs BTRFS <linux-btrfs@vger.kernel.org>
Subject: Re: So, wipe it out and start over or keep debugging?
Date: Tue, 18 Aug 2015 11:56:42 -0400 [thread overview]
Message-ID: <55D355BA.40500@gmail.com> (raw)
In-Reply-To: <CAK7bmU8uXvAcqWZbJs_Hv5LxG0R9_+pG-ecj1k8Np2q_+yNK_w@mail.gmail.com>
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On 2015-08-18 11:10, Timothy Normand Miller wrote:
> I ran the following command. It spent a lot of time creating a
> 1672450048 byte file. Then it stopped writing to the file and started
> using 100% CPU. It's currently doing no I/O, and it's been doing that
> for a while now. Is that supposed to happen?
>
Not normally, I've seen this happen sometimes before for a short period
when it hits a group of blocks that don't compress well, but that
usually goes away after a few seconds. I think this is probably a bug.
However, it isn't unusual for a big filesystem to have a really small
image produced if it contains mostly big files (btrfs-image just copies
the metadata, not the actual file data, so even without compression, it
usually will take up less space than the filesystem being imaged).
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next prev parent reply other threads:[~2015-08-18 15:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-15 21:46 So, wipe it out and start over or keep debugging? Timothy Normand Miller
2015-08-17 11:43 ` Austin S Hemmelgarn
2015-08-17 18:52 ` Timothy Normand Miller
2015-08-18 11:21 ` Austin S Hemmelgarn
2015-08-18 13:30 ` Timothy Normand Miller
2015-08-18 15:10 ` Timothy Normand Miller
2015-08-18 15:56 ` Austin S Hemmelgarn [this message]
2015-08-18 21:09 ` Chris Murphy
2015-08-18 21:10 ` Timothy Normand Miller
2015-08-20 11:35 ` Austin S Hemmelgarn
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