HP Instant Capacity (iCAP) manual 164

running iCAP software, the unreachable partition may be assumed to be using all cores on cells configured for that partition. Because of this, cells in partitions from which usage rights have been acquired should be rebooted or made inactive within 12 hours. If this is not done, the partition can begin to consume temporary capacity. If temporary capacity is not available, the complex might no longer be in compliance with the iCAP contract. Cells can be made inactive by removing them from the partition, shutting down the partition from within the OS by using shutdown -R-H, or with the MP RR command.

If, at the time of rights seizure, all member partitions are unreachable, the rights seizure is deferred and must be viewed as a limited and immediate loan of usage rights from the specified partition to the group. This loan of seized usage rights expires in 10 days. Upon expiration, usage rights are automatically restored to the member partitions from which they were seized. The expiration date for a rights seizure operation effectively terminates the period during which the core usage rights are available to other group members for purposes of disaster recovery. If none of the member partitions are reachable by the expiration date for a particular member, the usage rights are automatically restored (reassigned) to the member partition (or complex, in the case of unassigned seized rights) from which they were seized. However, if the seized usage rights have been redeployed to other members and are not released at expiration time, the group might go out of compliance, or temporary capacity might be used to maintain compliance.

If any partition of the inaccessible member from which rights seizures were deferred reconnects to the group before the expiration date, then the seized core usage rights (for all partitions) are finalized as a loan from the member to the group, the expiration date is no longer relevant, and the usage rights can thereafter be manipulated with normal icapmodify operations.

While rights seizure operations can be performed in a virtual partition environment, the rights seizure always operates on, and affects, the entire nPartition. This means:

•Rights seizure can be performed only if all the virtual partitions for an nPartition are down.

•For a given nPartition, you can specify any of the virtual partition host names as the target of a rights seizure operation or as the target of a usage rights restore operation.

•Because rights seizure leaves only a minimum of core usage rights with the nPartition, is it likely that the remaining number of core usage rights is not sufficient to satisfy the number of cores assigned to each virtual partition in the nPartition. This means that the virtual partitions likely cannot be booted (due to noncompliance) once the original failure is corrected.

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