Before you can configure or change the active core processors on an Exalytics Machine, you must generate a key file. You generate a unique key file each time that you want to change the number of core processors to active. To activate more core processors later, you follow the same procedure to generate a unique key file.
To generate a key file:
Make a note of the serial number. You need it in Step 4.
The Assets Details screen for the serial number is displayed.
The Manage Cores Configuration Key dialog box is displayed
Initially, you can select to activate any number of core processors that are less than the default active core processors. But once you activate the number of core processors that you want, you can only activate core processors greater than this amount. For example, if you initially activate 20 core processors, you cannot later activate core processors less than 20.
The generated key enables you to configure only the number of active core processors you selected in Step 6.