HP Instant Capacity User's Guide for versions 8.x > Chapter 6 Instant Capacity Cell Board

Instant Capacity Cell Board and Considerations of Core Usage Rights

  Table of Contents

  Index

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

State

Active Cell Board Cores

Inactive Cell Board
Cores

Notes

Before Cell Board Activation

4 active

4 inactive

No additional core usage rights are available on the complex

After Cell Board Activation

2 active,
2 inactive

2 active,
2 inactive

No additional core usage rights were required because the number of core usage rights was greater than the number of active cell boards

 

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

State

Active Cell Board Cores

Inactive Cell Board
Cores

Notes

Before Cell Board Activation

1 active,
3 inactive

4 inactive

No core usage rights are available on the complex

After Cell Board Activation

1 active,
3 inactive

1 active,
3 inactive
One additional core usage right was acquired because the number of core usage rights was less than the number of active cell boards