Taking snapshots of logical volumes
This video is part of a course titled Linux LVM Fundamentals using Ubuntu 18.04. Here is a link to the course: https://dev9.us/course/linux-lvm-fund...
Video objectives:
Remove previous Logical Volumes
Create a new Logical Volume
Format and mount a Logical Volume
Create a insufficiently sized snapshot for a logical volume
Exceed the COW table size of your snapshot
Create snapshots equaling the size of the logical volume
Commands used:
vgs
lvremove mydata-vg/volume1-lv
lvremove mydata-vg/volume2-lv
lvcreate -l 100%FREE -n volume1-lv mydata-vg /dev/sdb
mkfs.ext4 /dev/mydata-vg/volume1-lv
mount /dev/mydata-vg/volume1-lv /mnt/storage1/
lvcreate -L 10M -s /dev/mydata-vg/volume1-lv -n snap1
lvs
lvdisplay -m
dd if=/dev/urandom of=file1 bs=1M count=1
lvcreate -L 1G –snapshot /dev/mydata-vg/volume1-lv -n snap2
dd if=/dev/urandom of=file1 bs=1M count=9
lvcreate -L 1020M –snapshot /dev/mydata-vg/volume1-lv -n snap3
dd if=/dev/urandom of=file2 bs=1M count=5
lsblk
df -h
