HP Instant Capacity User's Guide for Versions 8.x

Instant Capacity Cell Board and Considerations of Core Usage Rights
There must be at least one core usage right available for an Instant Capacity cell board you wish
to activate. Each active cell board must have at least one active core. However, this does not
necessarily mean you must acquire additional core usage rights. No additional core usage rights
are required unless the requirement of a minimum of one core per active cell board could not be
met without acquiring additional core usage rights. That is, if the number of active cores in an
nPartition equals (or exceeds) the number of cell usage rights, then the purchase of additional
core usage rights is not necessary.
NOTE: The following examples assume that the number of Intended Active cores for the
nPartition remains constant before and after the cell board activation.
Example 6-1 Cell Board Activation Not Requiring Additional Core Usage Rights
For example, consider an nPartition with one active cell board with all four cores active, and one
inactive cell board with four inactive cores. The number of Intended Active cores for the nPartition
is four. There are no additional core usage rights available. Activation of the inactive cell board
on the complex will result in two active cores per cell board after a reboot. That is, the Instant
Capacity software distributes the available core usage rights across the two active cell boards in
the partition. The requirement that at least one core is active on each cell board is satisfied, so
purchase of additional core usage rights is not necessary. Of course, you may wish to activate
additional cores in the partition and if so, then you should purchase core usage rights at the same
time as the cell usage rights, but it is not required in this situation.
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 were required
because the number of core usage rights was
greater than the number of active cell boards
2 active, 2 inactive2 active, 2 inactiveAfter Cell Board
Activation
Example 6-2 Cell Board Activation Requiring Additional Core Usage Rights
In a different scenario, activation of an additional cell RTU can cause the number of core usage
rights to be below the minimum (one active core per active cell board) and necessitate the
acquisition of additional core usage rights. For example, consider an nPartition with one active
cell board containing one active core and three inactive cores, and one inactive cell board with
four inactive cores. The number of Intended Active cores is one and there are no available core
usage rights on the complex. In this case, purchase of an additional cell RTU for the inactive cell
board requires that an additional core usage right be purchased in order to meet the minimum
requirement of one 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 complex4 inactive1 active, 3 inactiveBefore Cell Board
Activation
One additional core usage right was acquired
because the number of core usage rights was less
than the number of active cell boards
1 active, 3 inactive1 active, 3 inactiveAfter Cell Board
Activation
92 Instant Capacity Cell Board