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

Instant Capacity Components
Overview
The Instant Capacity software monitors and enforces compliance with contractual agreements.
It authorizes or denies activation of system components (cores, cells, memory) based on a
complex-wide database of usage rights. See “Usage Rights Requirement” (page 33) for details
about acquiring additional usage rights.
Activation of components is restricted according to complex-wide compliance for each component
type. A complex is in a compliant state when the number of active components of a given type
does not exceed the number of that component’s available usage rights on the complex.
Cores (Processors)
While you purchase Instant Capacity processors for your system, the Instant Capacity software
monitors and manages the total number of cores. For example, a dual core Instant Capacity
processor is treated as two cores without usage rights.
The Instant Capacity software enforces compliance for cores by comparing the number of actual
inactive cores with the expected number of inactive cores (the number of cores without usage
rights) for the entire complex, according to the contract with HP. Available core usage rights
may be used to activate any core in an active cell board. Note also that Temporary Capacity may
be used to activate cores beyond the number of available core usage rights for the complex, but
only for a limited period of time.
NOTE: Unless a system participates in a GiCAP group (see Chapter 7), usage rights are
complex-wide (single node for OpenVMS) only. If components are moved from one complex to
another, the counts of allowable active and inactive components do not change for either complex.
In particular, the number of “expected inactive” components of each type does not change if
components are removed. This means that the removal of inactive components from a complex
can cause that complex to be out of compliance with the Instant Capacity contract because there
are fewer visible inactive components than the complex-wide count of components without
usage rights. The complex may even become unusable as would happen in the case where enough
other cores must be made inactive to meet compliance, such that there are no longer enough
active cores to have at least one active core per configured cell.
Cell Boards
Instant Capacity offers you a way to have additional (inactive) cell board capacity in your system
for growing business needs. When the need arises, these cell boards, which contain memory and
cores, are available for instant activation and use after reboot when additional cell board usage
rights are purchased from HP and an RTU codeword is applied. As with cores, the Instant
Capacity software enforces compliance by comparing the number of actual inactive cells with
the expected number of inactive cells, which is the number of cells without usage rights for the
entire complex.
The cell board, memory, and core usage rights are tracked separately. To activate an Instant
Capacity cell, you must acquire sufficient cell usage rights, as well as sufficient memory usage
rights to enable all the memory attached to the cell. You cannot activate a cell board without
activating all attached memory, so when you purchase an RTU for a cell you need to purchase
an RTU for the cell’s memory. These are normally bundled together in a single purchase.
Depending on the need, you may want to activate one or more cores at the same time the cell
and memory are activated, so you may also need to acquire additional core usage rights. After
a cell board is activated, all of the cores on the cell board are available for activation if the complex
has enough available core usage rights or temporary capacity. Since usage rights for all types of
34 Getting Started