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Al Sherkow’s Workload License Charges Seminar© - page 7 / 18

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Why Are There Specialty Engines?

  • zAAP and zIIP Move Work Off Your “General- Purpose” Engines

  • “Work” is CPU Usage

    • Java, as a More Modern Language Uses More CPU Resources Than COBOL

    • Generally WebSphere is 50% Java and 50% non-Java

  • zAAP/zIIP CPU Usage is Not Included in the 4-Hour Rolling Average

    • There Is Some Additional Overhead to Determine Which Work is zAAP/zIIP Eligible and to Handle Dispatching

    • CPU Resources Moved Out of the Maximum Simultaneous 4-Hour Rolling Average May Reduce Your Software Charges

    • Your Maximum Simultaneous 4-Hour Rolling Average May Move to Another Hour of the Month

©Al Sherkow, I/S Management Strategies, Ltd., 2007, All Rights of Reproduction Reserved.

Sherkow CMG 2007—

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Why Are There Specialty Engines?

  • When Does CPU Time Moving to a Specialty Engine Matter?

    • From a “Pricing” Point of View Only During the Hour (or the

typical hours) of Your Peak Simultaneous 4HRA of Each Machine

IF (Your Billable MSUs are Driven by Overnight Batch Workload) and (Specialty Engines Would “Help” Daytime Online Workload)

THEN There May Not be a Reduction In Monthly Charges!

©Al Sherkow, I/S Management Strategies, Ltd., 2007, All Rights of Reproduction Reserved.

Sherkow CMG 2007—

14

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