On Fri, Jun 10, 2016 at 8:04 PM, ojab // <o...@ojab.ru> wrote: > [Please CC me since I'm not subscribed to the list] > Hi, > I've tried to `/usr/bin/btrfs fi defragment -r` my btrfs partition, > but it's failed w/ "No space left on device" and now I can't get any > free space on that partition (deleting some files or adding new device > doesn't help). During defrag I've used `space_cache=v2` mount option, > but remounted FS w/ `clear_cache` flag since then. Also I've deleted > about 50Gb of files and added new 250Gb disk since then: > >>$ df -h /mnt/xxx/ >>Filesystem Size Used Avail Use% Mounted on >>/dev/sdc1 2,1T 1,8T 37G 99% /mnt/xxx >>$ sudo /usr/bin/btrfs fi show >>Label: none uuid: 8a65465d-1a8c-4f80-abc6-c818c38567c3 >> Total devices 3 FS bytes used 1.78TiB >> devid 1 size 931.51GiB used 931.51GiB path /dev/sdc1 >> devid 2 size 931.51GiB used 931.51GiB path /dev/sdb1 >> devid 3 size 230.41GiB used 0.00B path /dev/sdd1 >>$ sudo /usr/bin/btrfs fi usage /mnt/xxx/ >>Overall: >> Device size: 2.04TiB >> Device allocated: 1.82TiB >> Device unallocated: 230.41GiB >> Device missing: 0.00B >> Used: 1.78TiB >> Free (estimated): 267.23GiB (min: 152.03GiB) >> Data ratio: 1.00 >> Metadata ratio: 2.00 >> Global reserve: 512.00MiB (used: 0.00B) >> >>Data,RAID0: Size:1.81TiB, Used:1.78TiB >> /dev/sdb1 928.48GiB >> /dev/sdc1 928.48GiB >> >>Metadata,RAID1: Size:3.00GiB, Used:2.30GiB >> /dev/sdb1 3.00GiB >> /dev/sdc1 3.00GiB >> >>System,RAID1: Size:32.00MiB, Used:176.00KiB >> /dev/sdb1 32.00MiB >> /dev/sdc1 32.00MiB >> >>Unallocated: >> /dev/sdb1 1.01MiB >> /dev/sdc1 1.00MiB >> /dev/sdd1 230.41GiB >>$ sudo /usr/bin/btrfs balance start -dusage=66 /mnt/xxx/ >>Done, had to relocate 0 out of 935 chunks >>$ sudo /usr/bin/btrfs balance start -dusage=67 /mnt/xxx/ >>ERROR: error during balancing '/mnt/xxx/': No space left on device >>There may be more info in syslog - try dmesg | tail > > I assume that there is something wrong with metadata, since I can copy > files to FS. > I'm on 4.6.2 vanilla kernel and using btrfs-progs-4.6, btrfs-debugfs > output can be found here: > https://gist.githubusercontent.com/ojab/1a8b1f83341403a169a8e66995c7c3da/raw/61621d22f706d7543a93a3d005415543af9a0db0/gistfile1.txt. > Any hint what else can I try to fix the issue?
I have seldom seen an fs so full, very regular numbers :) But can you provide the output of this script: https://github.com/knorrie/btrfs-heatmap/blob/master/show_usage.py It gives better info w.r.t. devices and it is then easier to say what has to be done. But you have btrfs raid0 data (2 stripes) and raid1 metadata, and they both want 2 devices currently and there is only one device with place for your 2G chunks. So in theory you need 2 empty devices added for a balance to succeed. If you can allow reduces redundancy for some time, you could shrink the fs used space on hdd1 to half, same for the partition itself, add a hdd2 parttition and add that to the fs. Or just add another HDD. Then your 50Gb of deletions could get into effect if you start balancing. Also have a look at the balance stripe filters I would say. -- 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
