Linux/LVM: Difference between revisions

Latest revision as of 13:58, 1 April 2017

Installation

apt-get install lvm2
apt-get install system-config-lvm

Volumes

physical volume - pv

pvs
pvdisplay
pvcreate /dev/<Partition>

volume group - vg

vgs
vgdisplay
vgcreate <group> /dev/<Partition1> (/dev/<Partition2> /dev/<P3>...)

logical volume - lv

lvs
lvdisplay
lvcreate -L 2G -n <volume> <group> 
lvextend -L 5G /dev/<group>/<volume>

/dev/$vg/$lv

snapshots

lvcreate --size 100M --snapshot --name <snapshot_name> /dev/<group>/<volume>                             (size = max changed size)

mkdir /mnt/snapshot
mount /dev/$vg/$snapshot_name /mnt/snapshot

or

dd if=/dev/$vg/$snapshot_name of=/mnt/backup/snapshot.img

umount /mnt/snapshot
lvremove /dev/$vg/$snapshot_name

Resize

lvextend -L+1000M /dev/$vg/$vol
umount /lvm-test
e2fsck -f /dev/$vg/$vol
resize2fs /dev/$vg/$vol
mount -t ext2 /dev/$vg/$vol /lvm-test

@@ Line 23: / Line 23: @@
 vgs
 vgdisplay
-vgcreate <group> /dev/<Partition1> /dev/<Partition2>
+vgcreate <group> /dev/<Partition1> (/dev/<Partition2> /dev/<P3>...)
 </pre>
 </blockquote>
@@ Line 39: / Line 39: @@
 * /dev/$vg/$lv
-* snapshots
+== snapshots ==
 <blockquote>
 <pre>
-lvcreate --size 100M --snapshot --name <name> /dev/<group>/<volume>                             (size = max changed size)
+lvcreate --size 100M --snapshot --name <snapshot_name> /dev/<group>/<volume>                             (size = max changed size)
-</pre>
-</blockquote>
+mkdir /mnt/snapshot
+mount /dev/$vg/$snapshot_name /mnt/snapshot
+or
+dd if=/dev/$vg/$snapshot_name of=/mnt/backup/snapshot.img
+umount /mnt/snapshot
+lvremove /dev/$vg/$snapshot_name
+</pre>
+</blockquote>
+== Resize ==
 <blockquote>
 <pre>
+lvextend -L+1000M /dev/$vg/$vol
+umount /lvm-test
+e2fsck -f /dev/$vg/$vol
+resize2fs /dev/$vg/$vol
+mount -t ext2 /dev/$vg/$vol /lvm-test
 </pre>
 </blockquote>
+[[Category:Linux/System]]
+[[Category:Linux]]