soft:lvm
Table of Contents
LVM - Logical volume manager
- List Physical Volumes:
pvs - List Volume Groups:
vgs - List Volumes:
lvs
pvcreate /dev/sdX vgcreate vg0 /dev/sdX
Thin volumes
It's better to use thin provisioned volumes to have snapshots comes for free (copy on write) and are better for SSDs
Thin provisioned volumes are created from a “pool”.
lvcreate -L 100G --thin vg/thin
Then create volume within the pool:
lvcreate -n myvol -T vg/thin -V 10G
Then to take a snapshot:
lvcreate -kn -n myvol_snap -s vg/myvol
To restore the snapshot
lvremove vg/myvol lvrename vg/myvol_snap vg/myvol
Non-Thin volumes
Create a volume:
lvcreate -L10G -n myvol vg
Take a snapshot, you MUST give a size here, the diff between snapshot and original volume will be stored here. In case of this space being consumed, the snapshot is corrupted :/
lvcreate -L2G -s -n myvol_snap vg/myvol
To restore the snapshot
lvconvert --merge vg/myvol_snap
Backup using lvm snapshots
- http://ed.zehome.com/2018/sauvegarde-lvm-simple-partie-2/ backup block device limiting impact on CPU and disk I/O
soft/lvm.txt · Last modified: by phil