Compressing and Deduplicating Storage with VDO 
use VDO volumes to optimize storage space in use

#yum install vdo kmod-kvdo
#yum list installed vdo

#vdo create --name=vdo1 --device=/dev/vdd --vdoLogicalSize=50G
#vdo list
#vdo status --name=vdo1
#vdo status --name=vdo1 | grep -E 'Deduplication|Compression'
	Compression: enabled
	Deduplication: enabled
#udevadm settle

#mkfs.xfs -K /dev/mapper/vdo1
#mkdir /mnt/vdo1
#mount /dev/mapper/vdo1 /mnt/vdo1
#mount | grep vdo1

Verify the data deduplication and compression :
#vdostats --human-redable
#cp /root/install.img /mnt/vdo1/install.img.1
#vdostats --human-readable
#cp /root/install.img /mnt/vdo1/install.img.2
#cp /root/install.img /mnt/vdo1/install.img.3
#vdostats --human-readable
