Kernel 4.11, btrfs-progs v4.7.3
I run scrub and balance every night, been doing this for 1.5 years on this
filesystem.
But it has just started failing:
saruman:~# btrfs balance start -musage=0 /mnt/btrfs_pool1
Done, had to relocate 0 out of 235 chunks
saruman:~# btrfs balance start -dusage=0 /mnt/btrfs_pool1
Done, had to relocate 0 out of 235 chunks
saruman:~# btrfs balance start -musage=1 /mnt/btrfs_pool1
ERROR: error during balancing '/mnt/btrfs_pool1': No space left on device
aruman:~# btrfs balance start -dusage=10 /mnt/btrfs_pool1
Done, had to relocate 0 out of 235 chunks
saruman:~# btrfs balance start -dusage=20 /mnt/btrfs_pool1
ERROR: error during balancing '/mnt/btrfs_pool1': No space left on device
There may be more info in syslog - try dmesg | tail
BTRFS info (device dm-2): 1 enospc errors during balance
BTRFS info (device dm-2): relocating block group 598566305792 flags data
BTRFS info (device dm-2): 1 enospc errors during balance
BTRFS info (device dm-2): 1 enospc errors during balance
BTRFS info (device dm-2): relocating block group 598566305792 flags data
BTRFS info (device dm-2): 1 enospc errors during balance
saruman:~# btrfs fi show /mnt/btrfs_pool1/
Label: 'btrfs_pool1' uuid: bc115001-a8d1-445c-9ec9-6050620efd0a
Total devices 1 FS bytes used 169.73GiB
devid 1 size 228.67GiB used 228.67GiB path /dev/mapper/pool1
saruman:~# btrfs fi usage /mnt/btrfs_pool1/
Overall:
Device size: 228.67GiB
Device allocated: 228.67GiB
Device unallocated: 1.00MiB
Device missing: 0.00B
Used: 171.25GiB
Free (estimated): 55.32GiB (min: 55.32GiB)
Data ratio: 1.00
Metadata ratio: 1.00
Global reserve: 512.00MiB (used: 0.00B)
Data,single: Size:221.60GiB, Used:166.28GiB
/dev/mapper/pool1 221.60GiB
Metadata,single: Size:7.03GiB, Used:4.96GiB
/dev/mapper/pool1 7.03GiB
System,single: Size:32.00MiB, Used:48.00KiB
/dev/mapper/pool1 32.00MiB
Unallocated:
/dev/mapper/pool1 1.00MiB
How did I get into such a misbalanced state when I balance every night?
My filesystem is not full, I can write just fine, but I sure cannot
rebalance now.
Besides adding another device to add space, is there a way around this
and more generally not getting into that state anymore considering that
I already rebalance every night?
Thanks,
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/
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