Re: snapshot space available

[Clemens Eisserer <linuxhippy@gmail.com>]

You are out of metadata, not "normal space".
However, the good question is why 0.5GB of metadata are unused and
btrfs reports no space left.
I have seen similar behaviour on a machine of mine, with exactly 0.5GB
of metadata unused.

Regards

2013/8/26 Russell Coker <russell@coker.com.au>:
> Linux xev 3.10-2-amd64 #1 SMP Debian 3.10.5-1 (2013-08-07) x86_64 GNU/Linux
>
> I've attached a file of script output from a system running the above Debian
> kernel on a system with an Intel 120G SSD.  To get this working again I
> extended the filesystem in question to also use a small USB flash device (4G
> from memory) and then deleted some old snapshots to free some space.
>
> The most intereting part of the script output is pasted below.  The system
> reports that the filesystem is 82% full but that there is no space left.
>
> root@xev:~# df -h /
> Filesystem                                              Size  Used Avail Use%
> Mounted on
> /dev/disk/by-uuid/586e6f48-2985-4115-9f89-f844b319c7c0  108G   87G   21G  82%
> /
> root@xev:~# btrfs filesystem df /
> Data: total=101.57GB, used=81.50GB
> System, DUP: total=8.00MB, used=20.00KB
> System: total=4.00MB, used=0.00
> Metadata, DUP: total=3.00GB, used=2.50GB
> Metadata: total=8.00MB, used=0.00
> root@xev:~# ls -l > test
> bash: test: No space left on device
> root@xev:~# touch test
> touch: cannot touch ‘test’: No space left on device
> root@xev:~#
>
> --
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