2016-02-27 23:14 GMT+02:00 Marc Haber <mh+linux-bt...@zugschlus.de>:
> Hi,
>
> I have again the issue of no space left on device while rebalancing
> (with btrfs-tools 4.4.1 on kernel 4.4.2 on Debian unstable):
>
I've same issue, 4.4.3 kernel on Arch Linux
$ sudo btrfs fi show /mnt/fs/
Label: 'fs' uuid: a3c66d25-2c25-40e5-a827-5f7e5208e235
Total devices 1 FS bytes used 396.94GiB
devid 1 size 435.76GiB used 435.76GiB path /dev/sdi2
$ sudo btrfs fi df /mnt/fs/
Data, single: total=416.70GiB, used=390.62GiB
System, DUP: total=32.00MiB, used=96.00KiB
Metadata, DUP: total=9.50GiB, used=6.32GiB
GlobalReserve, single: total=512.00MiB, used=0.00B
$ sudo btrfs fi usage /mnt/fs/
Overall:
Device size: 435.76GiB
Device allocated: 435.76GiB
Device unallocated: 1.00MiB
Device missing: 0.00B
Used: 403.26GiB
Free (estimated): 26.07GiB (min: 26.07GiB)
Data ratio: 1.00
Metadata ratio: 2.00
Global reserve: 512.00MiB (used: 0.00B)
Data,single: Size:416.70GiB, Used:390.62GiB
/dev/sdi2 416.70GiB
Metadata,DUP: Size:9.50GiB, Used:6.32GiB
/dev/sdi2 19.00GiB
System,DUP: Size:32.00MiB, Used:96.00KiB
/dev/sdi2 64.00MiB
Unallocated:
/dev/sdi2 1.00MiB
$ sudo btrfs balance start -v /mnt/fs/
Dumping filters: flags 0x7, state 0x0, force is off
DATA (flags 0x0): balancing
METADATA (flags 0x0): balancing
SYSTEM (flags 0x0): balancing
ERROR: error during balancing '/mnt/fs/': No space left on device
There may be more info in syslog - try dmesg | tail
$ sudo btrfs balance start -dusage=34 /mnt/fs/
Done, had to relocate 0 out of 438 chunks
$ sudo btrfs balance start -dusage=35 /mnt/fs/
ERROR: error during balancing '/mnt/fs/': No space left on device
$ sudo btrfs balance start -musage=0 /mnt/fs/
Done, had to relocate 0 out of 438 chunks
$ sudo btrfs balance start -musage=1 /mnt/fs/
ERROR: error during balancing '/mnt/fs/': No space left on device
$ sudo btrfs balance start -dprofiles=single /mnt/fs
ERROR: error during balancing '/mnt/fs': No space left on device
$ sudo btrfs balance start -mprofiles=dup /mnt/fs
Done, had to relocate 20 out of 438 chunks
$ sudo btrfs balance start -sprofiles=dup --force /mnt/fs
Done, had to relocate 1 out of 433 chunks
$ sudo btrfs fi df /mnt/fs/
Data, single: total=416.70GiB, used=390.62GiB
System, DUP: total=32.00MiB, used=96.00KiB
Metadata, DUP: total=7.00GiB, used=6.31GiB
GlobalReserve, single: total=512.00MiB, used=0.00B
$ sudo btrfs fi usage /mnt/fs/
Overall:
Device size: 435.76GiB
Device allocated: 430.76GiB
Device unallocated: 5.00GiB
Device missing: 0.00B
Used: 403.25GiB
Free (estimated): 31.07GiB (min: 28.57GiB)
Data ratio: 1.00
Metadata ratio: 2.00
Global reserve: 512.00MiB (used: 0.00B)
Data,single: Size:416.70GiB, Used:390.62GiB
/dev/sdi2 416.70GiB
Metadata,DUP: Size:7.00GiB, Used:6.31GiB
/dev/sdi2 14.00GiB
System,DUP: Size:32.00MiB, Used:96.00KiB
/dev/sdi2 64.00MiB
Unallocated:
/dev/sdi2 5.00GiB
now balance works
$ sudo btrfs balance start -m /mnt/fs/
Done, had to relocate 15 out of 433 chunks
$ sudo btrfs balance start /mnt/fs/
it's still going but most likley it will finish
$ sudo btrfs balance status /mnt/fs/
Balance on '/mnt/fs/' is running
26 out of about 431 chunks balanced (27 considered), 94% left
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