Hostname is one of the names used to identify this machine. It is primarily used for
internal processes (most importantly, Failover and Volume replication). It is different
from the server name; usually server name is primarily used for NAS protocols.
Hostname needs to start with a lowercase letter; the other characters may consist of
lowercase letters, digits, minus signs and dots.
NOTE It is not possible to change the hostname while the failover service is running.
NOTE Changing hostname requires a reboot.