| 1 |
parted -s /dev/sdb mklabel gpt |
| 2 |
parted -s /dev/sdb mkpart primary 1MiB 100% |
| 3 |
|
| 4 |
partprobe |
| 5 |
|
| 6 |
|
| 7 |
# Natural LVM |
| 8 |
|
| 9 |
mkdir /var/log/mongologs |
| 10 |
mkfs.btrfs /dev/sdb1 |
| 11 |
|
| 12 |
#+ cow disabled for /var/log/mongologs |
| 13 |
echo "`blkid | grep sdb1 | awk '{ print $2 }'` /var/log/mongologs btrfs defaults,nodatacow 0 0" >> /etc/fstab |
| 14 |
|
| 15 |
mount /var/log/mongologs |
| 16 |
|
| 17 |
dd if=/dev/zero of=/var/log/mongologs/big-file.whatever bs=1M count=1024 |
| 18 |
|
| 19 |
btrfs device add /dev/sdc /var/log/mongologs |
| 20 |
# VIEW DISTRIBUTION BEFORE AND AFTER BALANCE WITH: btrfs filesystem show /var/log/mongologs |
| 21 |
btrfs balance start -d -m /var/log/mongologs |
| 22 |
|
| 23 |
|
| 24 |
# RAID |
| 25 |
|
| 26 |
mkdir /var/lib/mongodb |
| 27 |
|
| 28 |
mkfs.btrfs -m raid1 -d raid1 /dev/sdd /dev/sde |
| 29 |
|
| 30 |
# NOTE: it's sdd, not sdd1 |
| 31 |
echo "`blkid | grep sdd | awk '{ print $2 }'` /var/lib/mongodb btrfs defaults,noatime 0 0" >> /etc/fstab |
| 32 |
|
| 33 |
mount /var/lib/mongodb |
| 34 |
|
| 35 |
|
| 36 |
#+ disable cow on one file |
| 37 |
touch /var/lib/mongodb/some-random-file.txt |
| 38 |
sudo chattr -C /var/lib/mongodb/some-random-file.txt |
| 39 |
|
| 40 |
|
| 41 |
wget https://linux.azure.david.betz.space/raw/btrfs/repair.sh -O /root/repair.sh |
| 42 |
chmod +x /root/repair.sh |
| 43 |
|