IBM United States
Software Announcement 203-200
August 12, 2003

IBM Tivoli Performance Modeler for z/OS V2.1 delivers edit capability and enhanced capacity planning to help manage IBM eServer zSeries and System/390

 ENUS203-200.PDF (45KB)

At a glance

IBM Tivoli Performance Modeler for z/OS V2.1 is a PC-based capacity planning and performance modeling tool for OS/390® or z/OS-based mainframe computers that helps:

  • Optimize mainframe system resource
  • Deliver optimum service for customer/user satisfaction
  • Enter a proactive mode of planning or predicting:
    • Additional or new workloads
    • Future upgrades and other long-term system capacity requirements
  • Gather and report on day-to-day workload data
  • Model "what-if" versus actual scenarios
  • Provide multiple image modeling capability
  • Workload and LPAR editing

For ordering, contact:

Your IBM representative, an IBM Business Partner, or the Americas Call Centers at 800-IBM-CALL (Reference: YE001).


IBM Tivoli® Performance Modeler for z/OS® V2.1 is a PC-based performance modeling and capacity planning tool that runs on Windows®. It can be as portable as your PC or laptop. IBM Tivoli Performance Modeler for z/OS is designed for system management on the zSeries® and System/390® (S/390®).

With growing operating system complexity and the huge impact of responding to workloads, basic Central Processor Unit (CPU) utilization is no longer enough. IBM Tivoli Performance Modeler for z/OS can model:

  • Number and speed of CPUs
  • Disk I/O response times
  • Paging rates (auxiliary and expanded memory paging)
  • Logical partitioning (LPAR) definitions and parameter changes

New in this version:

  • Multiple image modeling capability — this feature allows you to create models for up to 10 images on the same processor and model the performance within multiple logical partitions (LPARs). With V1 of IBM Tivoli Performance Modeler for z/OS, you could only model the performance of a single image (LPAR #1) at one time. All other LPARs were modeled as a constant amount of capacity (MIPs) being consumed. This feature also allows you to see the interaction between the multiple LPARs based on the LPAR weighting factors assigned to each LPAR.
  • Workload and LPAR editing — the new edit feature, available from the main menu, gives you the ability to cut and paste workloads or LPAR definitions from one model to another. The ability to select a workload (or LPAR) in one model and cut or copy it into another model makes it easy to move work between images, and then model the impact on performance. This can be especially helpful when evaluating workloads moving within a Sysplex.
  • Enhanced CPU support — support for modeling of processors with up to 32 physical CPUs (V1 supported a maximum of 20 CPUs). This enables modeling support for zSeries z990 Models A08, B16, C24, and D32.

Key prerequisites

  • Any PC that runs Windows 98, Windows 2000, Windows NT®, or Windows XP (recommended 300 MHz, or greater)
  • IBM z/OS Resource Measurement Facility (RMF™), or equivalent software (such as CMF MONITOR from BMC Software)
  • Excel or Lotus® 1-2-3® spreadsheet

Planned availability date

August 15, 2003


IBM Tivoli Performance Modeler for z/OS V2.1 helps you plan for acceptable levels of computing while managing your IT costs. You define your acceptable limits on response times, level of workloads, and service available to the end user using:

  • Tracking and reporting function: Capture and report resource usage, including historical charts for trend analysis.
  • Workload characterization and priority: You decide the level of aggregation for data reporting.
  • End-to-end performance modeling that spans zSeries and System/390.
  • Modeling input data manually entered or captured from other tools (RMF, CMF).
  • Fast, efficient simulation techniques.
  • An easy-to-use interface with a clear link between the data you input and the resulting reports.

Bottom line: Good data can help you make better decisions.

Additional characteristics of IBM Tivoli Performance Modeler for z/OS V2.1 include:

  • Installs easily and can be up and running in minutes
  • Allows all zSeries and S/390 model simulations to run on a PC
  • Helps the user review the impact of workload changes in the current S/390 environment and on future processor types
  • Examines "what if" scenarios without the expense of running actual scenarios
  • Helps predict the impact of hardware and software changes accuracy
  • Indicates current processor utilization against processor capacity
  • Helps predict when increased processor capacity will be required
  • Provides integration with spreadsheet tools such as Lotus 1-2-3 and Microsoft™ Excel

Performance management

By definition, a system is out of capacity when it can no longer meet the service commitments made to the end users. To properly predict when capacity needs to be increased, any capacity planning tool must be able to predict — or model — the impact of change on end-user performance. Multitier platforms and reliance on Internet, intranets, and extranets makes prediction very difficult. If they are to help, capacity planning tools must consider all of the components in the delivery of service. Systems programmers or operations professionals can use capacity planning — or performance modeling — tools to simulate the actual performance behavior of the mainframe computer. They can predict the output of these complex mainframe systems and also the impact of changing hardware or software. With this data, you can manage your zSeries or S/390 proactively.

After building and calibrating a baseline model, all results will be compared to that baseline. Changing configuration definitions is relatively simple.

Simulation versus analytic models

IBM Tivoli Performance Modeler for z/OS V2.1 creates a simulation model that can easily be modified to reflect changes in the operating system when they occur.

Modeling techniques generally fall into one of two categories — simulation or analytic. In some cases, hybrid models have been developed which use combinations of both techniques. The differences between these techniques are as follows. Analytic models consist of mathematical equations that describe the processes being modeled. Analytic models are used when the processes being modeled are well understood and can be described as mathematical expressions. Simulation models rely on running the actual process being modeled, but in a simplified form. Since these processes take place over time, simulation requires running (simulating) these processes over and over in order to reach a steady state that mimics the real process.

Analytic models typically are, by their nature, fast to run and require less processing power than simulation. Analytic models execute a number of mathematical equations and can run in seconds or less. Computer-based simulators must execute lots of instructions in order to simulate one point in time. Since simulators must model a period of time, many iterations must take place before the results are meaningful. This means simulators can run for an extended amount of real time, and can use a larger amount of computer resources compared to analytic models. Simulators are used today to predict complex processes where analytic equations are not suitable. Some examples of these simulators are models that are used to predict weather and the presence of oil deposits. These models require large amounts of computer resources, but produce results that are not attainable with analytic techniques.

In the early days of mainframe computers, operating systems were simpler than they are today. Over time, features have been added and operating system complexity has grown. Older analytic models, which were developed to predict computer performance, have found it difficult to keep up with the changing nature and complexity of today's systems. Analytic models use mathematical equations that represent the actual events being modeled. Changing the internals of an analytic model means changing these equations, which can be difficult to do. As computing systems grow more complicated, it can become increasingly more difficult to derive queuing equations that can accurately model these systems.

IBM Tivoli Performance Modeler for z/OS V2.1 creates simulation models and therefore has a distinct advantage over products that use analytic models when staying current with system changes. Simulation models rely on programming (not queuing equations) to model the actual systems. It is typically much easier to reprogram the simulator to account for system changes than it is to generate new queuing equations. Simulators can be easily reprogrammed to model changes in the operating system as they occur.

Model input and output

IBM Tivoli Performance Modeler for z/OS V2.1 can model a wide variety of hardware and software changes.

It is a powerful tool that can help you analyze "what-if" scenarios. For example, it can model the effects of:

  • Hardware configuration changes
  • Changing LPAR parameters, including the number of logical CPUs per LPAR and any weighting factors
  • Changing the growth rate of workloads

The input definitions are specified on three easy-to-understand screens:

  • Configuration screen
  • Workload activity screen
  • LPAR definition screen

As you build and calibrate your capacity planning model, you can capture numeric or text data. If you accumulate weekly reports, several weekly reports can be merged to produce a monthly report, and so on.

An output metric is the performance of each workload modeled:

  • For online workloads — the average response time (in seconds)
  • For batch workloads — the average elapsed time

Graphing workload performance

While the simulator is running, you can see a graphical picture of workload performance. You can choose up to 4 workloads from a panel of 20 workloads to display in a continuously updated line graph.

Section 508 of the U.S. Rehabilitation Act

IBM Tivoli Performance Modeler for z/OS V2.1 is capable, as of August 1, 2003, when used in accordance with IBM's associated documentation, of satisfying the applicable requirements of Section 508 of the Rehabilitation Act, provided that any assistive technology used with the product properly interoperates with it.

Value Unit based pricing

Value Unit based pricing will help to align the prices of these products to the principle of the PSLC pricing curve which provides for a lower price per MSU (millions of service units per hour) for larger capacities.

There is also a price benefit when you grow your capacity. Additional capacity will based on the number of Value Units (MSUs) you have already installed. For example, additional capacity will not be priced starting at the base with a higher price per unit but on the capacity that is already installed.

For IBM Tivoli Performance Modeler for z/OS V2.1, the Value Units are derived based on the total MSUs of the System/370™, S/390, and zSeries based systems running OS/390, z/OS, and z/OS.e that are to be modeled by this software.

Note that Value Units of a given product cannot be exchanged/interchanged/aggregated with Value Units of another product.

IPLA and Subscription and Support considerations

IPLA licenses can be transferred from one machine to another within, but not limited to an enterprise. You may aggregate the capacity for all the processors the product is operated on to achieve a more economic price. This will result in a single Proof of Entitlement. It is your responsibility to manage the distribution of Value Units within the limits of the entitlement of the product license.

Subscription and Support must cover the same capacity as the product license entitlement. Subscription and Support will be available in the country in which the agreement is made.

Product positioning

IBM Tivoli Performance Modeler for z/OS V2.1 is complementary to IBM Tivoli Decision Support for OS/390, which provides a central repository for easy access to enterprise-wide IT information for performance reporting, capacity management, service level management, and accounting.


RMF and System/370 are trademarks of International Business Machines Corporation in the United States or other countries or both.
z/OS, Tivoli, S/390, System/390, zSeries, Lotus, 1-2-3, and OS/390 are registered trademarks of International Business Machines Corporation in the United States or other countries or both.
Microsoft is a trademark of Microsoft Corporation.
Windows and Windows NT are registered trademarks of Microsoft Corporation.
Other company, product, and service names may be trademarks or service marks of others.

Education support

Training is available, or will be available, for many IBM Tivoli® products. Education is offered through IBM Learning Services and through IBM Tivoli Software Authorized Training Providers.

For current information on IBM Tivoli software education, visit the IBM Tivoli Software Education home page at:

or call 888-746-3331.

Current schedule information for IBM Tivoli training is available on the Tivoli Software Education Schedules page at:

Offering information

Product information will be available on day of announcement through the Offering Information Web site at:


The IBM Publications Center:

The Publications Center is a worldwide central repository for IBM product publications and marketing material with a catalog of 70,000 items. Extensive search facilities are provided. Payment options for orders are via credit card or customer number. A large number of publications are available online in various file formats, and they can all be downloaded free of charge.

The IBM Publications Notification System (PNS):

The PNS enables subscribers to set up profiles of interest by order number/product number. PNS subscribers automatically receive notifications by e-mail of all new publications defined in their profiles. These may then be ordered/downloaded via the Publications Center.

Displayable softcopy publications: The following publications are provided in English in displayable softcopy form. The displayable manuals are part of the basic machine-readable material CD-ROM.

  • IBM Tivoli Performance Modeler for z/OS® User's Guide and Reference
  • License Information Booklet

These displayable manuals are provided in both BookManager® and Adobe Acrobat PDF formats. The manuals can be used with the BookManager READ licensed programs or Adobe Acrobat in any of the supported environments. Terms and conditions for use of the machine-readable files are shipped with the files.

Technical information

Specified operating environment

Hardware requirements

Hardware requirements for IBM Tivoli Performance Modeler for z/OS V2.1 are:

  • Any IBM mainframe system capable of running one of the required MVS™ operating systems
  • A PC capable of running one of the supported Windows® versions; 300 MHz, or greater, recommended

IBM Tivoli Performance Modeler for z/OS V2.1 also supports the following zSeries® z990 hardware: 2084-A08, 2084-B16, 2084-C24, and 2084-D32.

Software requirements

On the mainframe system to be configured:

  • One of the following MVS operating systems:
    • z/OS (5694-A01)
    • z/OS.e (5655-G52)
    • OS/390® (5647-A01)
  • IBM z/OS Resource Measurement Facility (RMF™) or CMF MONITOR from BMC Software

On the workstation machine on which the tool will run:

  • One of the following supported Windows versions:
    • Windows 98
    • Windows 2000
    • Windows NT®
    • Windows XP
  • One of the following spreadsheet products to graph modeling:
    • Excel
    • Lotus® 1-2-3®

Planning information


IBM Tivoli Performance Modeler for z/OS V2.1 is distributed with:

  • International Program License Agreement (Z125-3301)
  • CD-ROM

Security, auditability, and control

IBM Tivoli Performance Modeler for z/OS V2.1 uses the security and auditability features of the operating system software.

The customer is responsible for evaluation, selection, and implementation of security features, administrative procedures, and appropriate controls in application systems and communication facilities.

Ordering information

The product in this announcement has one charge unit — Value Units. The Value Units are derived based on the total MSUs of the System/370™, S/390, and zSeries based systems running OS/390, z/OS, and z/OS.e that are to be modeled by this software.

Value Unit Exhibit VUE007

            MSUs         MSUs         Value
            minimum      maximum      Units/MSU
Base          1            3          1
Tier A        4           45          0.45
Tier B       46          175          0.36
Tier C      176          315          0.27
Tier D      316            +          0.2

Value Units for non-MSU-based S/390® processors:

                         Value Units/
Hardware                 machine
MP3000 H30                6
MP3000 H50                8
MP3000 H70               12
ESL Models                2

Translation from MSUs to Value Units

                       MSUs           Units/MSU
Base                     1-  3        1.00
Tier A                   4- 45         .45
Tier B                  46-175         .36
Tier C                 176-315         .27
Tier D                     316+        .20

Ordering example: The total number of Value Units is calculated according to the following example.

Quantity                 number
1 Value Unit             3962
250 Value Units          3963

If the customer has installed 1,500 MSUs, the applicable Value Units would be:

Translation from MSUs to Value Units
                              Value                 Value
            MSUs       *      Units/MSU      =      Units
Base            3      *      1.00           =        3.00
Tier A         42      *       .45           =       18.90
Tier B        130      *       .36           =       46.80
Tier C        140      *       .27           =       37.80
Tier D      1,185      *       .20           =      237.00
Total       1,500                                   343.50

When calculating the total number of Value Units, the sum is to be rounded up to the next integer.

Example: In the above ordering example, for the product running on a machine with 1,500 MSUs requiring 344 Value Units, order feature number 3962, quantity 94, and feature number 3963, quantity 1.

Value Units for IBM 9672 Processors will be based upon the full capacity of these systems. This is applicable to all S/390-based systems that are measured on MSU capacity. Information on MSU capacities can be found in the IBM System/370, System/390®, and zSeries Machine Exhibit , Z125-3901.

Value Units for zSeries will be based upon full MSU capacity as defined in the Machine Exhibits.

There will be a tool available that provides support for transforming the MSU-based capacities of S/390 systems to new Value Units by calculating the applicable number of Value Units for a given number of MSUs.

Current licensees

Current licensees with active maintenance or subscription will receive instructions on how to order the new version.

New licensees

Orders for new licenses will be accepted now.

Shipment will begin on the planned availability date.

Basic license

To order, specify the program number, feature number 9001 for asset registration, and the one-time charge (OTC) feature number. Also specify the feature number of the desired distribution medium.

To suppress shipment of media, select the license-only option in CFSW.

IBM Tivoli Performance Modeler for z/OS V2.1 is eligible for On Off Capacity on Demand (OOCoD). To order OOCoD, specify the OTC feature number for MSU Day Authorizations. For more information on OOCoD, refer to Software Announcement 203-202 , dated August 12, 2003.

                                             OTC      Medium
                                   Program   feature  feature
Description                        number    number   number   Medium
IBM Tivoli Performance Modeler     5698-A18           5809     CD-ROM
 for z/OS V2.1
  1 Value Unit                               3962
  250 Value Units                            3963
MSU Day Authorizations: *
 Per 1 On Off Capacity On Demand             3964
  Temporary Use Charge
 Per 250 On Off Capacity On Demand           3965
  Temporary Use Charge
Note: On Off Capacity On Demand will be available September 12, 2003.

Subscription and Support

To receive voice technical support via telephone during normal business hours, and future releases and versions at no additional charge, Subscription and Support must be ordered. The capacity of Subscription and Support (Value Units) must be the same as the capacity ordered for the product licenses.

To order, specify the support program number and feature number 9001 for asset registration. Also, specify the desired charge and medium feature numbers.

IBM is providing Subscription and Support for this product via a separately purchased offering under the terms of the IBM International Agreement for Acquisition of Support (IAAS). This offering:

  • Includes and extends the support services provided in the base support to include technical support via telephone during normal business hours.
  • Entitles customers to future releases and versions, at no additional charge. Note that the customer is not entitled to new products.

Once Subscription and Support is ordered, the charges will renew automatically annually unless cancelled by the customer.

To decline Subscription and Support, specify the program number and the Decline (no charge) feature number listed below:

                                           charge   Medium
                                 Program   feature  feature
Description                      number    number   number   Medium
IBM Tivoli Performance Modeler   5698-S52           6300     Hardcopy
 for z/OS One Year                                            Pub
 Subscription and Support
  1 Value Unit                             3997
  250 Value Units                          3998
 Decline (no charge)                       3989
 Per MSU Registration (no                  3992
 Per 250 MSU Registration (no              3993
Note: MSU Registration will be available September 12, 2003.

Terms and conditions

Licensing: IBM International Program License Agreement. Proofs of Entitlement (PoEs) are required for all authorized use.

These products are licensed under the IBM Program License Agreement (IPLA), and the associated Agreement for Acquisition of Support, and the Addendum for Support (Z125-6883) which provides for support with ongoing access to releases and versions of the program. These programs have a one-time license charge for use of the program and an ongoing recurring charge for the enhanced support that includes telephone assistance (voice support for defects during normal business hours) as well as access to updates, releases, and versions of the program as long as support is in effect. S/390 and zSeries IBM Operational Support Services — Support Line is an option for those customers who desire added services.

Limited warranty applies: Yes

Warranty: This program has warranty for a minimum of one year from acquisition from IBM or authorized Business Partner. The warranty provided to the customer, for at least one year from acquisition, is access to databases (read Web sites) for program information, FAQs, including any known fixes to defects, which the customer can download or obtain otherwise and install at their leisure.

Program support: Subscription and Support includes telephone assistance (voice support for defects during normal business hours) as well as access to updates, releases, and versions of the program as long as support is in effect. Customers will be notified of discontinuance of support with 12 months notice. If you require additional support from IBM, including an extension of support beyond the discontinuance date, contact your IBM Representative or Business Partner. This extension may be available for a fee.

Money-back guarantee: If for any reason you are dissatisfied with the Program, return it within 30 days from the invoice date, to the party (either IBM or its reseller) from whom you acquired it, for a refund. This applies only to your first acquisition of the Program.

Copy and use on home/portable computer: No

Volume orders (IVO): No

Passport Advantage® applies: No

Usage restriction: Yes

Usage is limited to the quantity of Value Units licensed.

Software Maintenance applies: No

IBM Operational Support Services — Support Line: Yes

AIX®/UNIX® Upgrade Protection applies: No

Entitled upgrade for current AIX/UNIX upgrade protection licensees: No

iSeries™ Software Subscription applies: No

Variable charges apply: No

Educational allowance available: Yes, 15% education allowance applies to qualified education institution customers.


The prices provided in this announcement are suggested retail prices for the U.S. only and are provided for your information only. Dealer prices may vary, and prices may also vary by country. Prices are subject to change without notice. For additional information and current prices, contact your local IBM representative.

                                    Program     feature
Description                         number      number     OTC
IBM Tivoli Performance Modeler      5698-A18
 for z/OS V2.1
  1 Value Unit                                  3962       $  1,650
  250 Value Units                               3963        412,500
MSU Day Authorizations:
 Per 1 On Off Capacity On Demand                3964              7
  Temporary Use Charge
 Per 250 On Off Capacity On Demand              3965          1,750
  Temporary Use Charge

                                    Program     feature    Annual
Description                         number      number     charge
IBM Tivoli Performance Modeler      5698-S52
 for z/OS One Year
 Subscription and Support
  1 Value Unit                                  3997       $   250
  250 Value Units                               3998        62,500

Global Financing

IBM Global Financing offers competitive financing to credit-qualified customers to assist them in acquiring IT solutions. Our offerings include financing for IT acquisition, including hardware, software, and services, both from IBM and other manufacturers or vendors. Offerings (for all customer segments: small, medium, and large enterprise), rates, terms, and availability can vary by country. Contact your local IBM Global Financing organization or visit the Web at:

Order now

To order, contact the Americas Call Centers, your local IBM representative, or your IBM Business Partner.

To identify your local IBM representative or IBM Business Partner, call 800-IBM-4YOU (426-4968).

 Phone:     800-IBM-CALL (426-2255)
 Fax:       800-2IBM-FAX (242-6329)
 Mail:      The Americas Call Centers
            Dept. YE001
            P.O. Box 2690
            Atlanta, GA  30301-2690
 Reference: YE001

The Americas Call Centers, our national direct marketing organization, can add your name to the mailing list for catalogs of IBM products.

Note: Shipments will begin after the planned availability date.


The e-business logo, MVS, RMF, System/370, z/Architecture, and iSeries are trademarks of International Business Machines Corporation in the United States or other countries or both.
Tivoli, z/OS, BookManager, zSeries, OS/390, Lotus, 1-2-3, S/390, System/390, Passport Advantage, and AIX are registered trademarks of International Business Machines Corporation in the United States or other countries or both.
Windows and Windows NT are registered trademarks of Microsoft Corporation.
UNIX is a registered trademark of the Open Company in the United States and other countries.
Other company, product, and service names may be trademarks or service marks of others.

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