Using Instant Capacity to Manage Processing Capacity

Deactivating Processors

 

Deactivation Example Session for

 

Hardware-partitionable Systems

 

The following example shows you how to deactivate an active processor.

 

At the beginning of this deactivation session, there are a total of 4

 

processors in the partition; 3 processors are active and 1 is inactive. In

 

this example, 1 active processor is deactivated, leaving the partition with

 

2 active processors and 2 inactive processors. As with activation, you do

 

not specify a particular processor to be deactivated. You specify only a

 

number of processors to be deactivated.

Example 4-4

Deactivating an Active Processor

 

/usr/sbin/icod_modify -d 1

 

2 processors are now active, and 2 processors are specified to

 

be active after the next reboot.

 

 

NOTE

In the above deactivation example, the processor deactivation is instant

 

(that is, does not require a reboot). To defer the deactivation (until the

 

next reboot) add the -Doption to the command. See the manpage

 

icod_modify(1M) for details.

 

The icod_modify command allows you to deactivate processors with the

 

 

-doption, or set the total number of active processors with the -soption.

 

For example, the icod_modify -d 1 command/option deactivates 1

 

additional processor in a partition. The icod_modify -s 2

 

command/option sets the total number of active processors in a partition

 

to 2.

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Chapter 4