BetterLinux CPU throtting requires 4-core servers. Certain other BetterLinux features will work with even 1 core (cloakfs, memory limit, process limit, etc).
When running cpud on servers with less than 4 cores, this error appears:
Error: cpud requires a minimum of 4 cpus in order to run when using start_throttling rules. [FAILED]
If you run this command:
[root@centos6-tim ~]# service cpud status
This message will appear:
cpud is not running