###### With barriers ON ###########

[student@workstation ~]$ time lab fencing setup
[sudo] password for student: 
Creating a basic cluster
  - Installing SSH key on nodea
  - Installing SSH key on nodeb
  - Installing SSH key on nodec
  - Installing SSH key on noded
 - Installing packages on nodea
 - Installing packages on nodeb
 - Installing packages on nodec
 - Running commands on nodea
 - Running commands on nodeb
 - Running commands on nodec
 - Running commands on nodea
 - Running commands on nodeb
 - Running commands on nodec
 - Running commands on nodea
 - Running commands on nodea
 - Running commands on nodea

real	4m9.913s
user	0m0.766s
sys	0m0.420s

####### With barriers OFF #############

[student@workstation ~]$ time lab fencing setup
[sudo] password for student: 
Creating a basic cluster
  - Installing SSH key on nodea
  - Installing SSH key on nodeb
  - Installing SSH key on nodec
  - Installing SSH key on noded
 - Installing packages on nodea
 - Installing packages on nodeb
 - Installing packages on nodec
 - Running commands on nodea
 - Running commands on nodeb
 - Running commands on nodec
 - Running commands on nodea
 - Running commands on nodeb
 - Running commands on nodec
 - Running commands on nodea
 - Running commands on nodea
 - Running commands on nodea

real	0m46.233s
user	0m0.894s
sys	0m0.508s