On Fri, Jun 10, 2016 at 2:58 PM, ojab // <o...@ojab.ru> wrote: > [Please CC me since I'm not subscribed to the list]
So I'm still playing w/ btrfs and again I have 'No space left on device' during balance: >$ sudo /usr/bin/btrfs balance start --full-balance /mnt/xxx/ >ERROR: error during balancing '/mnt/xxx/': No space left on device >There may be more info in syslog - try dmesg | tail >$ sudo dmesg -T | grep BTRFS | tail >[Wed Jun 15 10:28:53 2016] BTRFS info (device sdc1): relocating block group >13043037372416 flags 9 >[Wed Jun 15 10:28:53 2016] BTRFS info (device sdc1): relocating block group >13041963630592 flags 20 >[Wed Jun 15 10:29:54 2016] BTRFS info (device sdc1): found 25155 extents >[Wed Jun 15 10:29:54 2016] BTRFS info (device sdc1): relocating block group >13040889888768 flags 20 >[Wed Jun 15 10:30:50 2016] BTRFS info (device sdc1): found 63700 extents >[Wed Jun 15 10:30:50 2016] BTRFS info (device sdc1): relocating block group >13040856334336 flags 18 >[Wed Jun 15 10:30:51 2016] BTRFS info (device sdc1): found 9 extents >[Wed Jun 15 10:30:52 2016] BTRFS info (device sdc1): relocating block group >13039782592512 flags 20 >[Wed Jun 15 10:32:08 2016] BTRFS info (device sdc1): found 61931 extents >[Wed Jun 15 10:32:08 2016] BTRFS info (device sdc1): 896 enospc errors during >balance >$ sudo /usr/bin/btrfs balance start -dusage=75 /mnt/xxx/ >Done, had to relocate 1 out of 901 chunks >$ sudo /usr/bin/btrfs balance start -dusage=76 /mnt/xxx/ >ERROR: error during balancing '/mnt/xxx/': No space left on device >There may be more info in syslog - try dmesg | tail >$ sudo /usr/bin/btrfs fi usage /mnt/xxx/ >Overall: > Device size: 1.98TiB > Device allocated: 1.85TiB > Device unallocated: 135.06GiB > Device missing: 0.00B > Used: 1.85TiB > Free (estimated): 135.68GiB (min: 68.15GiB) > Data ratio: 1.00 > Metadata ratio: 2.00 > Global reserve: 512.00MiB (used: 0.00B) > >Data,RAID0: Size:1.84TiB, Used:1.84TiB > /dev/sdb1 895.27GiB > /dev/sdc1 895.27GiB > /dev/sdd1 37.27GiB > /dev/sdd2 37.27GiB > /dev/sde1 11.27GiB > /dev/sde2 11.27GiB > >Metadata,RAID1: Size:4.00GiB, Used:2.21GiB > /dev/sdb1 2.00GiB > /dev/sdc1 2.00GiB > /dev/sde1 2.00GiB > /dev/sde2 2.00GiB > >System,RAID1: Size:32.00MiB, Used:160.00KiB > /dev/sde1 32.00MiB > /dev/sde2 32.00MiB > >Unallocated: > /dev/sdb1 34.25GiB > /dev/sdc1 34.25GiB > /dev/sdd1 1.11MiB > /dev/sdd2 1.05MiB > /dev/sde1 33.28GiB > /dev/sde2 33.28GiB >$ sudo /usr/bin/btrfs fi show /mnt/xxx/ >Label: none uuid: 8a65465d-1a8c-4f80-abc6-c818c38567c3 > Total devices 6 FS bytes used 1.84TiB > devid 1 size 931.51GiB used 897.27GiB path /dev/sdc1 > devid 2 size 931.51GiB used 897.27GiB path /dev/sdb1 > devid 3 size 37.27GiB used 37.27GiB path /dev/sdd1 > devid 4 size 37.27GiB used 37.27GiB path /dev/sdd2 > devid 5 size 46.58GiB used 13.30GiB path /dev/sde1 > devid 6 size 46.58GiB used 13.30GiB path /dev/sde2 show_usage.py output can be found here: https://gist.github.com/ojab/a24ce373ce5bede001140c572879fce8 Balance always fails with '896 enospc errors during balance' message in dmesg. I don't quite understand the logic: there is a plenty of space on four devices, why `btrfs` apparently trying to use sdd[0-1] drives, is it a bug or intended behaviour? What is the proper way of fixing such an issue in general, adding more devices and rebalancing? How can I determine how many devices should be added and their capacity? I'm still on 4.6.2 vanilla kernel and using btrfs-progs-4.6. //wbr ojab -- 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
