I'm trying to run balance on a 4.13.2 kernel without much luck:
# time btrfs balance start -v /var/lib/lxd -dusage=5 -musage=5
Dumping filters: flags 0x7, state 0x0, force is off
DATA (flags 0x2): balancing, usage=5
METADATA (flags 0x2): balancing, usage=5
SYSTEM (flags 0x2): balancing, usage=5
Done, had to relocate 1 out of 353 chunks
real 0m2.356s
user 0m0.005s
sys 0m0.175s
# time btrfs balance start -v /var/lib/lxd -dusage=0 -musage=0
Dumping filters: flags 0x7, state 0x0, force is off
DATA (flags 0x2): balancing, usage=0
METADATA (flags 0x2): balancing, usage=0
SYSTEM (flags 0x2): balancing, usage=0
Done, had to relocate 0 out of 353 chunks
real 0m0.076s
user 0m0.004s
sys 0m0.008s
# time btrfs balance start -v /var/lib/lxd
Dumping filters: flags 0x7, state 0x0, force is off
DATA (flags 0x0): balancing
METADATA (flags 0x0): balancing
SYSTEM (flags 0x0): balancing
WARNING:
Full balance without filters requested. This operation is very
intense and takes potentially very long. It is recommended to
use the balance filters to narrow down the balanced data.
Use 'btrfs balance start --full-balance' option to skip this
warning. The operation will start in 10 seconds.
Use Ctrl-C to stop it.
10 9 8 7 6 5 4 3 2 1
Starting balance without any filters.
ERROR: error during balancing '/var/lib/lxd': No space left on device
There may be more info in syslog - try dmesg | tail
real 284m58.541s
user 0m0.000s
sys 47m39.037s
# df -h /var/lib/lxd
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 424G 318G 105G 76% /var/lib/lxd
# btrfs fi df /var/lib/lxd
Data, RAID1: total=318.00GiB, used=313.82GiB
System, RAID1: total=32.00MiB, used=80.00KiB
Metadata, RAID1: total=5.00GiB, used=3.17GiB
GlobalReserve, single: total=512.00MiB, used=0.00B
# btrfs fi show /var/lib/lxd
Label: 'btrfs' uuid: f5f30428-ec5b-4497-82de-6e20065e6f61
Total devices 2 FS bytes used 316.98GiB
devid 1 size 423.13GiB used 323.03GiB path /dev/sda3
devid 2 size 423.13GiB used 323.03GiB path /dev/sdb3
# btrfs fi usage /var/lib/lxd
Overall:
Device size: 846.25GiB
Device allocated: 646.06GiB
Device unallocated: 200.19GiB
Device missing: 0.00B
Used: 633.97GiB
Free (estimated): 104.28GiB (min: 104.28GiB)
Data ratio: 2.00
Metadata ratio: 2.00
Global reserve: 512.00MiB (used: 0.00B)
Data,RAID1: Size:318.00GiB, Used:313.82GiB
/dev/sda3 318.00GiB
/dev/sdb3 318.00GiB
Metadata,RAID1: Size:5.00GiB, Used:3.17GiB
/dev/sda3 5.00GiB
/dev/sdb3 5.00GiB
System,RAID1: Size:32.00MiB, Used:80.00KiB
/dev/sda3 32.00MiB
/dev/sdb3 32.00MiB
Unallocated:
/dev/sda3 100.10GiB
/dev/sdb3 100.10GiB
Mount flags in /etc/fstab are:
LABEL=btrfs /var/lib/lxd btrfs
defaults,noatime,space_cache=v2,device=/dev/sda3,device=/dev/sdb3,discard
0 0
Last pieces logged in dmesg:
[46867.225334] BTRFS info (device sda3): relocating block group
2996254998528 flags data|raid1
[46874.563631] BTRFS info (device sda3): found 9250 extents
[46894.827895] BTRFS info (device sda3): found 9250 extents
[46898.463053] BTRFS info (device sda3): found 201 extents
[46898.562564] BTRFS info (device sda3): relocating block group
2995181256704 flags data|raid1
[46903.555976] BTRFS info (device sda3): found 7299 extents
[46914.188044] BTRFS info (device sda3): found 7299 extents
[46914.303476] BTRFS info (device sda3): relocating block group
2947936616448 flags metadata|raid1
[46939.570810] BTRFS info (device sda3): found 42022 extents
[46945.053488] BTRFS info (device sda3): 2 enospc errors during balance
Tomasz Chmielewski
https://lxadm.com
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
