Table of Contents
Some useful LVM commands to me …
Logical Volume Operations
Extending logical volume size:
# Change size of logical_volume to 100G
lvextend -L 100G /dev/volume_group/logical_volume
# Change the size of logical_volume to 100% free space in the Volume Group
lvextend -l +100%FREE /dev/volume_group/logical_volume
Volume Group Operations
Add physical volume to a Volume Group
vgextend volume_group /dev/sda3
Physical Volumes Operations
Moving physical volume extents from one partition to another.
Let say you have added new partition, and want to move all lvm extents from old partition to the new one, then delete the old one.
Here is what you must do:
# Move contents of old physical volume to the new one [root@server ~]# pvmove /dev/sda4 /dev/sda3 /dev/sda4: Moved: 0.00% /dev/sda4: Moved: 1.09% /dev/sda4: Moved: 100% # Remove old physical volume from volume group [root@server ~]# vgreduce volume_group /dev/sda4
Informational / Status printing commands
Display physical volumes and their mappings
[root@server /]# pvdisplay -m
--- Physical volume ---
PV Name /dev/sda2
VG Name centos
PV Size 39.51 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 10114
Free PE 0
Allocated PE 10114
PV UUID sp1bAp-2EVX-UY8n-iSqv-Rvr3-7MLR-mM0Sfu
--- Physical Segments ---
Physical extent 0 to 9849:
Logical volume /dev/centos/root
Logical extents 0 to 9849
Physical extent 9850 to 10113:
Logical volume /dev/centos/swap
Logical extents 0 to 263
Report information about physical volumes
[root@server]# pvs PV VG Fmt Attr PSize PFree /dev/sda2 centos lvm2 a-- 39.51g 0 /dev/sda3 centos lvm2 a-- 193.76g 193.76g /dev/sda4 centos lvm2 a-- 185.33g 5.33g
Display logical volumes
[root@server ~]# lvdisplay --- Logical volume --- LV Path /dev/centos/root LV Name root VG Name centos LV UUID UaqJOA-WwhM-sjw2-ZfWQ-uSWy-lyT2-WgfmZo LV Write Access read/write LV Creation host, time localhost, 2016-07-01 10:53:10 +0100 LV Status available # open 1 LV Size 218.48 GiB Current LE 55930 Segments 2 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:1
Resources
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