MVS Jan 2005.p65 - CBT Tape
MVS Jan 2005.p65 - CBT Tape
MVS Jan 2005.p65 - CBT Tape
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The maintenance price for the zAAPs is also significantly<br />
lower than that of general purpose CPs and similar to the<br />
maintenance price for IFLs.<br />
All Java-based applications, including WebSphere application<br />
servers, can execute on these lower-cost zAAPs.<br />
zAAP doesn’t carry an MSU rating and IBM doesn’t include<br />
this processing capacity for computing software charges.<br />
Additional processing power can be exclusively added for<br />
processing the ever-changing Java-based Internet load by<br />
increasing zAAPs without affecting the MSU rating. The<br />
number of zAAPs that can be ordered is limited by the number<br />
of permanently purchased CPs and, of course, by the number<br />
of available engines on a given machine model.<br />
Even for existing loads, the sub-capacity option is expected to<br />
benefit when zAAP is used for handling the Java load. This is<br />
because Java work processed by zAAP is outside the normal<br />
processor time collection schemes.<br />
BENEFITS OF zAAP<br />
zAAP provides an attractive option for customers who would<br />
like to seamlessly integrate their Java-based Internet<br />
applications with their core legacy applications but have been<br />
deterred by the cost factor.<br />
Off-loading the Java workload to zAAP can help reduce the<br />
demands and capacity requirements on general purpose<br />
CPs.<br />
zAAPs do not provide performance improvements for the<br />
Java and WebSphere workloads at this point in time (though<br />
there is an indication that it is being considered and may<br />
possibly be available in the future). The Java application being<br />
deployed in the same LPAR as the associated database – as<br />
against multiple physical servers – can lead to the following<br />
advantages:<br />
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