z/OS Capacity Provisioning is available on z/OS V1.9 and above.
Performance and capacity management on System z™needs to ensure that the work is being processed according to the service level agreements that are in place. If for example workload increase requires that the processing capacity needs to be increased to accommodate the grown workload, capacity provisioning can do that either autonomic or in a simple manual way. The capacity change could be implemented via a permanent capacity increase or via a temporary capacity increase for seasonal or unpredictable peak periods.
IBM System z provides the capability to quickly and nondisruptively activate additional processor capacity that is built directly into System z servers —IBM Capacity Upgrade on Demand (CUoD) for a permanent increase of processing capability, and IBM On/Off Capacity on Demand (On/Off CoD) for a temporary capacity increase that lets you revert to your previous processing level whenever you wish.
Capacity Provisioning is designed to simplify the management of temporary capacity. The scope of z/OS Capacity Provisioning is to address capacity requirements for relatively short term workload fluctuations for which On/Off Capacity on Demand is applicable. It is not a replacement for the Capacity Management process.
Capacity Provisioning can help you to manage processor capacity on IBM System z10 when a suitable On/Off Capacity on Demand record is available. Capacity provisioning allows you to change the activation level of that On/Off CoD record with respect to general purpose capacity, and the number of zAAP or zIIP processors.
For general purpose capacity on subcapacity models it differentiate between „speed“ demand for higher capacity levels, and “unqualified” demand that could be satisfied by a capacity level increase as well as by additional processors.
CPM differentiates between different types of Provisioning Requests
- Manually through commands (SE/HMC actions still possible, of course)
- Scheduled (time condition without workload condition)
- Conditional (based on workload condition)
For further information on z/OS Capacity Provisioning refer to: Further Information