Make disk.0 cloning faster?

Hi all,
I have access to an opennebula 3.8 setup, which was installed by my friend whom I cannot connect with now.
I am trying to install another setup (same version, 3.8) which should work like that one.
I am able to setup the system in which VM’s are creating, but every VM requires copying of 1.5 GB of qcow2 image (cloning). That takes time as well as space.
But in the system that my friend set up, there’s no issue like that. The Image is cloned in 15-30 seconds, and VM starts soon after.
Our setup includes shared /var/lib/one directory over master and host machine.
Can anyone help me what need’s to be done to achieve such performance. I am adding the log of vm creation at my friends setup:
Thu Jun 30 15:17:06 2016 [DiM][I]: New VM state is ACTIVE. Thu Jun 30 15:17:06 2016 [LCM][I]: New VM state is PROLOG. Thu Jun 30 15:17:06 2016 [VM][I]: Virtual Machine has no context Thu Jun 30 15:17:51 2016 [TM][I]: clone: oneadmin SHARED Cloning /var/lib/one/datastores/1/8daa04ab4243ab07cc518288b7764171 in sand:/var/lib/one//datastores/0/2602/disk.0 Thu Jun 30 15:17:51 2016 [TM][I]: ls: cannot access /var/lib/one//datastores/0/1/: No such file or directory Thu Jun 30 15:17:51 2016 [TM][I]: clone: ######## Thu Jun 30 15:17:51 2016 [TM][I]: ExitCode: 0 Thu Jun 30 15:17:51 2016 [LCM][I]: New VM state is BOOT Thu Jun 30 15:17:51 2016 [VMM][I]: Generating deployment file: /var/lib/one/vms/2602/deployment.0 Thu Jun 30 15:17:51 2016 [VMM][I]: ExitCode: 0 Thu Jun 30 15:17:51 2016 [VMM][I]: Successfully execute network driver operation: pre. Thu Jun 30 15:17:52 2016 [VMM][I]: ExitCode: 0 Thu Jun 30 15:17:52 2016 [VMM][I]: Successfully execute virtualization driver operation: deploy. Thu Jun 30 15:17:52 2016 [VMM][I]: ExitCode: 0 Thu Jun 30 15:17:52 2016 [VMM][I]: Successfully execute network driver operation: post. Thu Jun 30 15:17:52 2016 [LCM][I]: New VM state is RUNNING
Please help me out here, as I am not able to find what’s that clone: ######## part is for.
Ask away any information/ config info you might need, I would try to respond promptly.