System z Application Assist Processor (zAAP)

zAAPs are orderable on the IBM zEnterprise 196 (z196) by feature code 1884, the IBM zEnterprise 114 (z114) by feature code 3397, the IBM System z10 Enterprise Class by feature code 6814, on the IBM System z Business Class by feature code 6653, on IBM System z9 Enterprise Class by feature code , IBM System z9 Business Class by feature code 7869,  as well as on the IBM zSeries  z990 by feature code 0520, and the IBM zSeries z890 servers by feature code 6520. To place your order or for more information, please work through your normal IBM Sales Channel.
The number of zAAPs ordered may not exceed the limit of available engines in the machine model.

For the IBM zEnterprise, System z10, and IBM System z9:

• Using the 1 to 1 ratio for planning zAAP on machine - one CP must be installed with or prior to any zAAPs being installed. That means the total number of zAAPs installed may not exceed the total number of CPs including Capacity Marker CP capacity.

For the IBM eServer zSeries 990:

• Using the 1 to 1 ratio for planning zAAP on machine - one CP must be installed with or prior to any zAAPs being installed. That means the total number of zAAPs installed may not exceed the total number of CPs plus unassigned CPs installed on the z990.

For the IBM eServer zSeries 890:

• One zAAP may be purchased for one-way z890 capacity settings (110 to 170).
  
  
• Two zAAPs may be purchased for two-way z890 capacity settings (210 to 270).
  
  
• One zAAP may be purchased for three-way z890 capacity settings.
  
  
• There are no available Processor Units (Pus) for purchase as zAAPs on four-way z890 capacity settings (410 to 470).
  

Capacity on Demand
When your business needs short term additional capacity System z Capacity On Demand settings can deliver it. You may need the flexibility to rapidly increase or decrease your computing capability as requirements change. This may mean a permanent capacity increase for planned growth or a temporary capacity increase for seasonal or unpredictable peak periods. IBM provides the capability to quickly and nondisruptively activate "extra" processor capacity that is built directly into System z9 and System z products, IBM Capacity Upgrade on Demand (CUoD) for a permanent increase of processing capability, and IBM On/Off Capacity on Demand1 (On/Off CoD) for a temporary capacity increase that lets you revert to your previous processing level whenever you wish.

System z Capacity on Demand is for not only general purpose processors, but zIIPs and zAAPs as well. See your IBM representative to see if one of these capacity on demand features is right for you.