Using the HMC, you can create and activate often-used collections
of predefined partition profiles. A collection of predefined partition
profiles is called a system profile. The system profile is an ordered
list of partitions and the profile that is to be activated for each
partition. The first profile in the list is activated first, followed
by the second profile in the list, followed by the third, and so
system profile helps you change the managed system from one complete
set of partition configurations to another. For example, a company
might want to switch from using 12 partitions to using only 4 every
day. To do this, the system administrator deactivates the 12 partitions
and activates a different system profile, one specifying 4 partitions.
The advantage in using a system profile is in the initial IPL of the
system. By starting in System profile mode, all of the partitions
defined in the profile will be started, whereas by starting in LPAR standby
mode, the system administrator would then have to start each LPAR
(and select the required profile for the LPAR) manually.