IBM z/OS manual Z990 Family Models, Z990 Models, Z990 and IBM On/Off Capacity on Demand

z990 Family Models

The z990 offers 4 models, the A08, B16, C24 and D32, which can be confi gured to give customers a highly scal- able solution to meet the needs of both high transaction processing applications and the demands of e-business. The new model structure provides between 1-32 confi gu- rable Processor Units (PUs) which can be characterized as either CPs, IFLs, ICFs, or zAAPs. A new easy-to-enable ability to “turn off” CPs is available on z990 (a similar offer- ing was available via RPQ on z900). The objective is to allow customers to purchase capacity for future use with minimal or no impact on software billing. An MES feature will enable the CPs for use where the customer requires the increased capacity. There are a wide range of upgrade options available which are indicated in the z990 models chart.

Unlike other zSeries server offerings, it is no longer pos- sible to tell by the hardware model (A08, B16, C24, D32) the number of PUs that are being used as CPs. For soft- ware billing purposes only, there will be a “software” model associated with the number of PUs that are characterized as CPs. This number will be reported by the Store System Information (STSI) instruction for software billing purposes only. There is no affi nity between the hardware model and the number of CPs. For example, it is possible to have a Model B16 which has 5 PUs characterized as CPs, so for software billing purposes, the STSI instruction would report

305.The more normal confi guration for a 5-way would be an A08 with 5 PUs characterized as CPs. The STSI instruc- tion would also report 305 for that confi guration.

z990 Models

*S/W	301 302 303	304 305 306 307	308 309 310	311 312 313 314	315 316 317 318	319 320	321 322	323 324 325 326	327 328 329	330	331 332
Model
	Model A08

Model B16

Model C24

Model D32

*S/W Model refers to number of installed CPs. Reported by STSI instruction. Model 300 does not have any CPs. Note: For MSU values, refer to: ibm.com/servers/eserver/zseries/library/swpriceinfo/

z990 and IBM ^On/Off Capacity on Demand

IBM ^On/Off Capacity on Demand (On/Off CoD) is offered with z990 processors to provide a temporary increase in capacity to meet customer's peak workload requirements. The scope of On/Off Capacity on Demand is to allow customers to temporarily turn on unassigned/ unowned PUs available within the current model for use as CPs or IFLs. Temporary use of CFs, memory and channels is not supported.

Before customers can order temporary capacity, they must have a signed agreement for Customer Initiated upgrade (CIU) facility. In addition to that agreement, they must agree to specifi c terms and conditions which govern the use of temporary capacity.

Typically, On/Off Capacity on Demand will be ordered through CIU, however there will be an RPQ available if no RSF connection is present.

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