HP Instant Capacity User's Guide for Versions 8.x

Additional Considerations
Systems which do not have any Instant Capacity components can be part of a GiCAP group.
Deactivating resources on these systems allows them to loan usage rights to other members in
the group.
Members of a GiCAP group do not have to be located near each other. IP connectivity between
the members and the Group Manager, sufficient GiCAP Sharing Rights, and adherence to the
GiCAP grouping rules are the only constraints.
The GiCAP software uses the Secure Shell product to provide secure communication between
the Group Manager and the group members. If SSH is installed after Instant Capacity, a provided
script (/etc/opt/iCAP/GiCAP_keygen) must be invoked in order to configure secure
communication.
It is recommended that the IP address of the Group Manager not be a dynamic address. The
member systems of a GiCAP group store the IP address of the Group Manager and therefore
will lose communication with the Group Manager if the IP address changes. If the Group
Manager’s IP address changes and it loses communication with the member systems, you must
first restore the Group Manager’s old IP address and re-establish communication with the member
systems, and remove the group members. Then change the IP address on the Group Manager
to the new IP address and re-add the group members.
If the GiCAP Group Manager system becomes unavailable, usage rights and temporary capacity
remain as per allocated to each group member. Within a server complex, the usage rights can be
deployed to other partitions, but movement of usage rights between complexes is unavailable
when the Group Manager is unavailable.
On a system with full usage rights, the icapd daemon does not constantly check the system
configuration. It can take up to 12 hours for each partition of a system converted from non-iCAP
to iCAP to discover that it is now an iCAP system. During this time, icapmanage -s will show
asterisks for the new member, and icapstatus on that system will show “Runs iCAP” as “N”.
To force a faster conversion, kill the icapd daemon and wait for it to restart.
Additional Considerations 119