IBM System z Software Pricing

Sub-Capacity Corner

Linux on System z Middleware Software Licensing Overview

Middleware programs running in the Linux operating system environment are licensed through Passport Advantage which has sub-capacity licensing rules which are different from the sub-capacity licensing rules of the traditional z/OS, z/TPF, and z/VSE System z operating system environments. The Passport Advantage website has extensive information about all aspects of Passport Advantage Virtualization Capacity (Sub-capacity) Licensing on all supported platforms.

This web page serves as an overview for System z customers who want to understand how to count the required number of engines for licensing Linux Middleware in a System z environment, including when Linux is running as a guest of z/VM.

Linux is able to run on two different kinds of System z server engines:

  1. Integrated Facility for Linux engines, often called IFLs
  2. General purpose processors, often called Central Processor engines or CPs

Since the most common System z environment is Linux on IFLs the following examples will show IFLs, but the licensing rules are exactly the same if Linux is running on CPs.

When a customer qualifies for sub-capacity licensing under Passport Advantage, the maximum license requirement rules for a software product are:

Example 1

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Example 1 image, see text for description.

Example 2

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Example 3

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Example 4a

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Example 4b

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Example 5

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Example 5 image, see text for description.

Passport Advantage Part Numbers for Linux on z

Passport Advantage software is licensed and delivered using Part Numbers:

Most Passport Advantage Middleware programs which run in the Linux for System z environment are licensed with Processor Value Units (PVU). A PVU is a unit of measure used to differentiate licensing of software on different processor technologies (defined by Processor Vendor, Brand, Type and Model Number). Each software program has a unique price per PVU. See the Processor Value Unit [PVU] licensing for Distributed Software website for more information about PVUs, including a table defining the PVU requirements for the different processor types.

Many Passport Advantage Middleware programs have Part Numbers labeled with “Linux for System z”

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