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The IBM eServer™ zSeries Application Assist Processor (zAAP), available on the IBM eServer zSeries 990 (z990) and zSeries 890 (z890) servers, is an attractively priced specialized processing unit that provides a strategic z/OS Java execution environment for customers who desire the powerful integration advantages and traditional Qualities of Service of the zSeries platform.
The following subsystems provide zAAP execution potential:
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WAS 5.1
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IMS V7
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IMS V8
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IMS V9
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CICS 2.3
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DB2 V7
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DB2 V8
Additional information can be found on the zAAP home page, and in the following documents:
WLM Treatment of the zAAP Resource
A zAAP is a new resource type WLM is aware of that contributes usage and delay samples and service times.
zAAP utilization is reported by RMF (SPE OA05731), and zAAPs are managed by WLM as extension of CPs. Java work executing on zAAPs inherits the dispatch priority from its execution on regular CPs.
Execution is accounted for in execution velocity and goal achievement (PI). zAAPs are not varied by IRD Vary CPU Management and inherit weight from CP pool but are part of the ICF/IFL pool. Note that this is only true for z990 and z890; it no longer applies for z9-109.
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