LVM
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Info
- Phisical Volumes
pvs
- Volume Groups
vgs
- Logical Volumes
lvs
Phisical Volumes (PV)
pvs PV VG Fmt Attr PSize PFree /dev/sda vg_1 lvm2 a-- 930.82g 0 /dev/sdb vg_1 lvm2 a-- 931.31g 931.31g
- Phisical to Virtual
lvs -a -o +devices
- Segmentation
pvs -v --segments /dev/sdb1 PV VG Fmt Attr PSize PFree Start SSize LV Start Type PE Ranges /dev/sdb1 server03-vg lvm2 a-- 58.35g 40.35g 0 4608 root 0 linear /dev/sdb1:0-4607 /dev/sdb1 server03-vg lvm2 a-- 58.35g 40.35g 4608 10330 0 free
add a disk to a PV
vgextend vg_1 /dev/sdb Volume group "vg_1" successfully extended
remove a disk from PV
vgreduce vg_1 /dev/sdb Removed "/dev/sdb" from volume group "vg_1"
delete a PV
vgremove vg_1 Volume group "vg_1" successfully removed
Resizing out from Disk->PV->LV->Partition
- After resizing a physical drive this commands will claim the space gained to the file system.
- resizing LVM linux partition to the new disk boundaries
pvresize /dev/md1
pvresize --setphysicalvolumesize (size here) /dev/sda5
- adding 100G
lvextend -L+100G /dev/mapper/vg0-var
- ext4 resizing command
resize2fs /dev/mapper/vg0-var
df -hT
Logical Volumes
create a mirror volume
lvcreate -L 931g vg_1 -m 1 vg_1
create a mirror from existing and mounted volume
lvconvert -m1 vg_1/lv_home
- then we check the result:
# pvs;echo;vgs;echo;lvs PV VG Fmt Attr PSize PFree /dev/sda2 vg_1 lvm2 a-- 930.82g 0 /dev/sdb vg_1 lvm2 a-- 931.31g 56.33g
VG #PV #LV #SN Attr VSize VFree vg_1 2 3 0 wz--n- 1.82t 56.33g
LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert lv_home vg_1 mwi-aom- 874.98g lv_home_mlog 100.00 lv_root vg_1 -wi-ao-- 50.00g lv_swap vg_1 -wi-ao-- 5.84g