User's Manual

Instant Capacity Cell Board and Considerations of Core Usage Rights
At least one core usage right must be available for an Instant Capacity cell board you want to
activate. Each active cell board must have at least 1 active core. However, you do not necessarily
need to acquire additional core usage rights. No additional core usage rights are required unless
the requirement for a minimum of 1 core per active cell board cannot otherwise be met. If the
number of active cores in an nPartition equals (or exceeds) the number of cell usage rights, then
you do not need to purchase additional core usage rights.
NOTE: The following examples assume that the number of intended active cores for the
nPartition remains constant before and after cell board activation.
For example, consider an nPartition with 1 active cell board with all 4 cores active, and 1 inactive
cell board with 4 inactive cores. The number of intended active cores for the nPartition is 4. No
additional core usage rights are available. Activation of the inactive cell board on the complex
results in 2 active cores per cell board after reboot. That is, the Instant Capacity software distributes
the available core usage rights across the 2 active cell boards in the partition. The requirement
that at least 1 core is active on each cell board is satisfied, so purchase of additional core usage
rights is not necessary. You can choose to activate additional cores in the partition. If you do so,
you should purchase core usage rights at the same time as the cell usage rights. In this instance,
it is not required.
Table 6-1 Cell Board Activation Not Requiring Additional Core Usage Rights
NotesInactive Cell Board
Cores
Active Cell Board
Cores
State
No additional core usage rights are available on
the complex.
4 inactive4 activeBefore Cell Board
Activation
No additional core usage rights are required
because the number of core usage rights is greater
than the number of active cell boards.
2 active, 2 inactive2 active, 2 inactiveAfter Cell Board
Activation
In a different scenario, activation of an additional cell usage right can cause the number of core
usage rights to be below the minimum (1 active core per active cell board) and necessitate the
acquisition of additional core usage rights. For example, consider an nPartition with 1 active cell
board containing 1 active core and 3 inactive cores, and 1 inactive cell board with 4 inactive cores.
The number of intended active cores is 1 and there are no available core usage rights on the
complex. In this case, purchase of an additional cell usage right for the inactive cell board requires
purchase of an additional core usage right in order to meet the minimum requirement of 1 core
per active cell board.
Table 6-2 Cell Board Activation Requiring Additional Core Usage Rights
NotesInactive Cell Board
Cores
Active Cell Board
Cores
State
No core usage rights are available on the complex.4 inactive1 active, 3 inactiveBefore Cell Board
Activation
One additional core usage right is acquired
because the number of core usage rights is less
than the number of active cell boards.
1 active, 3 inactive1 active, 3 inactiveAfter Cell Board
Activation
96 Instant Capacity Cell Board