Hello.
We are have a strange situation with btrfs snapshot. We have a special
script to create snapshot and if we create several snapshots in the same
time we get ENOSPC error. But if we create snapshots one after another with
a little pause between (about 10 minutes), then everything looks ok.
Is there any command to determine that it is safe to make another snapshot?
# uname -a
Linux OraCI2.sigma-it.local 4.8.4-1.el7.elrepo.x86_64 #1 SMP Sat Oct 22
11:47:38 EDT 2016 x86_64 x86_64 x86_64 GNU/Linux
# btrfs --version
btrfs-progs v4.8.1
# btrfs fi show
Label: 'BUILDS' uuid: ce8952ff-30e5-48c5-8cd2-529c95667aa8
Total devices 1 FS bytes used 356.82GiB
devid 1 size 1000.00GiB used 383.00GiB path /dev/nvme0n1p1
Label: none uuid: a712598d-cc4f-4dc5-bdfb-de7ae432b109
Total devices 1 FS bytes used 4.71TiB
devid 1 size 7.66TiB used 4.96TiB path
/dev/mapper/OraCI2-docker--data
Label: none uuid: 89c0495f-ed26-4d66-b83b-ffb5882bd082
Total devices 1 FS bytes used 880.43GiB
devid 1 size 1.93TiB used 913.01GiB path /dev/nvme0n1p2
# btrfs fi df /var/lib/docker/db/STANDS
Data, single: total=4.89TiB, used=4.68TiB
System, DUP: total=8.00MiB, used=592.00KiB
Metadata, DUP: total=35.00GiB, used=26.29GiB
GlobalReserve, single: total=512.00MiB, used=4.41MiB
Best regards,
Dmitry Nechaev
С уважением,
Дмитрий Нечаев,
Ведущий инженер Группы сетевого и системного администрирования Отдела
системной интеграции ООО "СИГМА"
Тел: +7 812 602 27 72 доб. 158
Факс: +7 812 602 2770
e-mail: d.nechaev@xxxxxxxxxxx
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