LVM
PV(/dev/sda) –> VG –> LV –> directory
Create PV change system ID to LVM (8e) under fdisk
pvcreate /dev/sdb1
To check PV: pvs or pvdisplay
create VG vgcreate vg-name /dev/sdb1 /dev/sdb2
To check VG: vgs or vgdisplay
create LV lvcreate -L 800M -n lv-name vg-name
To check LV: lvs or lvdisplay
create filesystem mkfs.ext4 /dev/vg-name/lv-name
Increase size
resize LV lvresize -L 900M /dev/vg-name/lv-name resize filesystem resize2fs /dev/vg-name/lv-name
Shrink size
1. unmount the volume first
2. run filecheck fsck -f /dev/vg-name/lv-name
resize filesystem resize2fs /dev/vg-name/lv-name 800M resize LV lvresize -L 800M /dev/vg-name/lv-name
Snapshot
1. Create a directory for snapshot
2. Create a snapshot of 100M on LV
lvcreate -L 100M -s -n lvmsnapshot /dev/vg-name/lv-name
3. mount the snapshot to retrieve file
mount -t ext4 /dev/vg-name/lvmsnapshot /directoy
delete snapshot:
lvmremove /dev/vg-name/lvmsnapshot
GUI tool for LVM
yum install system-config-lvm
Go on to part 3 of the cheat sheet
