IBM z/OS 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

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.

301302 303 304 305 306 307 308 309 310 311312 313 314 315 316 317 318 319 320 321322 323 324 325 326 327 328 329 330 331332

Model B16

Model D32

Model C24

* 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/

*S/W

Model

Model A08

z990 Family Models