zIIP installation zIIPs and logical partition definitions z14 ZR1 feature Max4 Max12 Max24 Max30 Maximum zIIPs 0 - 2 0 - 8 0 - 12 0 - 12 One CP must be installed with or before any zIIP is installed. In z14 ZR1, the zIIP-to-CP ratio  is 2:1, which means that up to 12 zIIPs can be characterized. The allowable number of zIIPs  for each feature is listed in Table 3-3. zIIPs are orderable by using FC 1067. Up to two zIIPs can be ordered for each CP or marked  CP configured in the system. PUs that are characterized as zIIPs within a configuration are grouped into the zIIP pool. This  configuration allows zIIPs to have their own processing weights, independent of the weight of  parent CPs. The zIIP pool can be seen on the hardware console. The number of permanent zIIPs plus temporary zIIPs cannot exceed twice the number of  purchased CPs plus temporary CPs. Also, the number of temporary zIIPs cannot exceed the  number of permanent zIIPs. zIIPs are dedicated or shared, depending on whether they are part of an LPAR with dedicated  or shared CPs. In an LPAR, at least one CP must be defined before zIIPs for that partition can  be defined. The number of zIIPs that are available in the system is the number of zIIPs that  can be defined to an LPAR. Table 3-3 Number of zIIPs per model LPAR:  In an LPAR, as many zIIPs as are available can be defined together with at least  one CP. A system assist processor (SAP) is a PU that runs the channel subsystem LIC to control I/O  operations. All SAPs run I/O operations for all LPARs. All models feature standard SAPs  configured. The number of standard SAPs on the z14 ZR1 is two, regardless of the CPC  drawer feature.  A standard SAP configuration provides a well-balanced system for most environments.  However, some application environments have high I/O rates, typically Transaction  Processing Facility (TPF) environments. In this case, more SAPs can be ordered. Assigning  of more SAPs can increase the capability of the channel subsystem to run I/O operations. The option to order more SAPs is available on all z14 ZR1 features (FC 1066). These extra  SAPs increase the capacity of the channel subsystem to run I/O operation, which is  suggested for TPF environments. In z14 ZR1 systems, the maximum number of optional  (extra) orderable SAPs is two, regardless of the CPC drawer feature. 3.5.6 System assist processors SAP configuration Optional other orderable (extra) SAPs 92  IBM 14 Model ZR1 Technical Guide