Using Instant Capacity to Manage Processing Capacity

Activating Processors

Activating Processors

Activating Processors in nPartitions

IMPORTANT

The icod_modify command provides the ability to increase processing capacity instantly by activating licensed processors in nPartitions (hard partitions) of Instant Capacity systems. At any time, any number of inactive (licensed) processors can be activated, in accordance with complex-wide compliance. See “Instant Capacity Integration with Virtual Partitions” on page 132 for details about activation in virtual partitions.

The software provides two types of activation:

•Instant (icod_modify command’s default behavior) — the activation occurs immediately

•Deferred (icod_modify command’s -Doption) — the activation occurs after the next reboot of the partition

Instant activation of processors occurs when the icod_modify command is used with either the -aor -soption, and the -Doption is not specified.

Deferred activation of processors occurs when the icod_modify command is used with both the -Doption and either the -aor -soption specified. With the deferred option (-D), processor activation occurs after a reboot of the partition. The scheduled timing of the reboot (and the processor activation) can take place at a planned time. For example, if you activate processors in deferred activation mode and schedule a partition reboot to occur on the first day of the next month, the processors are activated at that time.

Always use the shutdown command when shutting down or rebooting a partition with Instant Capacity. See the manpage shutdown (1M) for information on the shutdown command.

Deferred activation does change the quantity of activated and inactivated processing capacity, even if the partition reboot has not yet occurred. Complex-wide compliance checking is calculated as if the activation had not been deferred.

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Chapter 4