LVM thin provisioning - file system usage and pool usage dosn't match
When I was demonstrating LVM thin provisioning to new batch of campus hires ; they pointed out an important mismatch between thin pool usage and actual file system usage. I thought , it would be worthy to give it a try to find the cause. So here we go; I created a thin pool with size of 100MB and thin volume of 1GB Thin volume formatted with ext4 and mounted over /test_fs Everything was going smooth as per the plan until we did a tar backup of /usr over /test_fs. Here we go ; * Created vg001 - size 12GB [root@ol7-san ~]# vgdisplay vg001 --- Volume group --- VG Name vg001 System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 12 VG Access ...