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lpi2:btrfs

ext? nach btrfs konvertieren:

man btrfs-convert

Dateisystem anlegen und mounten:

mkfs.btrfs /dev/sda2
mkdir /mnt/btrfs
mount /dev/sda2 /mnt/btrfs
cp -a /usr/share/ /mnt/btrfs
cd /mnt/btrfs

Informationen über das Dateisystem anzeigen:

btrfs subvolume show .

→ Subvolume ID: 5

btrfs subvolume list .

→ noch keine Subvolumes

Subvolume anlegen und Daten hinein verschieben:

btrfs subvolume create subvol1
btrfs subvolume list .
btrfs subvolume show subvol1

→ Subvolume ID: 259 → Parent ID: 5

time mv ./share/ ./subvol1/

Subvolume umbenennen:

mv subvol1/ subvol2

Snapshot erstellen:

btrfs subvolume snapshot subvol2 snap1
btrfs subvolume list .
btrfs subvolume show snap1

→ Subvolume ID: 260 → Parent ID: 5

Read-only Snapshot erstellen:

btrfs subvolume snapshot -r subvol2 snap_ro1
btrfs filesystem df -h
btrfs filesystem du -s --human-readable .
du -sh .
du -shx .
btrfs filesystem du -s --human-readable subvol2
du -sh subvol2
btrfs filesystem du -s --human-readable snap1

SuSE default:

mkfs.btrfs ${BOOT_DEVICE}2
uuid=$(lsblk -n -o uuid ${BOOT_DEVICE}2)
mkdir $target
mount UUID="$uuid" $target || exit
btrfs subvolume create ${target%/}/@
btrfs subvolume create ${target%/}/@/.snapshots
mkdir -p               ${target%/}/@/.snapshots/1
btrfs subvolume create ${target%/}/@/.snapshots/1/snapshot
mkdir -p               ${target%/}/@/boot/grub2
btrfs subvolume create ${target%/}/@/boot/grub2/i386-pc
btrfs subvolume create ${target%/}/@/boot/grub2/x86_64-efi
btrfs subvolume create ${target%/}/@/opt
btrfs subvolume create ${target%/}/@/srv
btrfs subvolume create ${target%/}/@/tmp
mkdir -p               ${target%/}/@/usr
btrfs subvolume create ${target%/}/@/usr/local
mkdir -p               ${target%/}/@/var
btrfs subvolume create ${target%/}/@/var/crash
mkdir -p               ${target%/}/@/var/lib/libvirt
btrfs subvolume create ${target%/}/@/var/lib/libvirt/images
btrfs subvolume create ${target%/}/@/var/lib/mailman
btrfs subvolume create ${target%/}/@/var/lib/mariadb
btrfs subvolume create ${target%/}/@/var/lib/mysql
btrfs subvolume create ${target%/}/@/var/lib/named
btrfs subvolume create ${target%/}/@/var/lib/pgsql
btrfs subvolume create ${target%/}/@/var/log
btrfs subvolume create ${target%/}/@/var/opt
btrfs subvolume create ${target%/}/@/var/spool
btrfs subvolume create ${target%/}/@/var/tmp
subvolid=$(btrfs subvolume show $target/@/.snapshots/1/snapshot | sed -rn 's/.*Object ID:\s+//p')
btrfs subvolume set-default "$subvolid" "$target"
lpi2/btrfs.txt · Zuletzt geändert: 2018/06/28 06:57 von ingo_wichmann