SPARC: Dynamic Reconfiguration Operations and Resource Pools
Dynamic Reconfiguration (DR) enables you to reconfigure hardware while the system is running.
A DR operation can increase, reduce, or have no effect on a given
type of resource. Because DR can affect available resource amounts, the pools facility
must be included in these operations. When a DR operation is initiated, the
pools framework acts to validate the configuration.
If the DR operation can proceed without causing the current pools configuration to
become invalid, then the private configuration file is updated. An invalid configuration is
one that cannot be supported by the available resources.
If the DR operation would cause the pools configuration to be invalid, then
the operation fails and you are notified by a message to the
message log. If you want to force the configuration to completion, you must
use the DR force option. The pools configuration is then modified to comply
with the new resource configuration. For information on the DR process and the
force option, see the dynamic reconfiguration user guide for your Sun hardware.
If you are using dynamic resource pools, note that it is possible
for a partition to move out of poold control while the daemon is active.
For more information, see Identifying a Resource Shortage.