MVS Jan 2005.p65 - CBT Tape

The maintenance price for the zAAPs is also significantly
lower than that of general purpose CPs and similar to the
maintenance price for IFLs.
All Java-based applications, including WebSphere application
servers, can execute on these lower-cost zAAPs.
zAAP doesn’t carry an MSU rating and IBM doesn’t include
this processing capacity for computing software charges.
Additional processing power can be exclusively added for
processing the ever-changing Java-based Internet load by
increasing zAAPs without affecting the MSU rating. The
number of zAAPs that can be ordered is limited by the number
of permanently purchased CPs and, of course, by the number
of available engines on a given machine model.
Even for existing loads, the sub-capacity option is expected to
benefit when zAAP is used for handling the Java load. This is
because Java work processed by zAAP is outside the normal
processor time collection schemes.
BENEFITS OF zAAP
zAAP provides an attractive option for customers who would
like to seamlessly integrate their Java-based Internet
applications with their core legacy applications but have been
deterred by the cost factor.
Off-loading the Java workload to zAAP can help reduce the
demands and capacity requirements on general purpose
CPs.
zAAPs do not provide performance improvements for the
Java and WebSphere workloads at this point in time (though
there is an indication that it is being considered and may
possibly be available in the future). The Java application being
deployed in the same LPAR as the associated database – as
against multiple physical servers – can lead to the following
advantages:
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