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6 SPARC Enterprise Mx000 Servers Capacity on Demand (COD) User’s Guide • January 2012
Note – Once you have used headroom to activate a COD resource, you are
contractually obligated to purchase a COD permits for it.
By default, COD resources arrive with headroom disabled. You can use the setcod
command to establish it. However, if you already have COD permits for all your
COD resources, configuring headroom has no effect. In that case, you need to install
additional COD boards to retain your headroom capacity. You can also reduce or
disable headroom at any time.
While headroom is in use, warning messages appear on the console every four
hours. Once you either deactivate the hot-spared COD board or purchase COD
Hardware Activation Options for the COD CPUs in use and enter the keys into the
COD database, the warning messages stop and headroom is automatically reduced.
Violations
A violation occurs if more COD resources are in use than authorized on the server.
These events can cause a violation:
■ The COD database is lost or corrupted while the system is running. This state is
detected on the subsequent XSCF reset. To cancel the violation, use the
addcodactivation(8) command to reenter into the COD database the keys you
received with your COD Hardware Activation Option purchases.
■ You execute the command deletecodactivation -f, causing deletion of a
COD key in the COD database while the server is using the associated COD
permit. This could be a valid action in certain cases. For example, you might want
to delete unwanted COD permits, but delay shutting down the domain.
■ You disable headroom while the server is still using COD resources.
Once the system detects a violation, the Service Processor posts a notice on the
server console and ensures that no additional COD resources are brought online
until the violation is corrected. In the meantime, it will not shut down domains or
COD resources.
COD Commands
The available commands vary depending on the firmware version.