Capacity Planning for Computer Systems

Capacity Planning for Computer Systems

1st Edition - October 20, 1994

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  • Author: Tim Browning
  • eBook ISBN: 9781483266251

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Capacity Planning for Computer Systems covers the principles, concepts, and practical application of capacity planning to computer systems. This book is divided into nine chapters and begins with an introduction to the foundation and metrics of capacity planning. The subsequent chapters deal with the business elements, service levels, forecasting, and predictions of capacity planning, along with the regression techniques, forecast monitoring, and revision for the field. The remaining chapters highlight the applications of capacity planning, including in systems optimization, computer disk, tape, and tape drive. These chapters also provide the charting and graphics presentations for capacity planning. This book will be of value to computer scientists and researchers.

Table of Contents

  • Acknowledgments


    1 Capacity Planning Foundations

    What Is Capacity Planning?

    Capacity Planning—Art and Science

    The Planning Process

    Evaluation of Future Scenarios—The Spectrum of Probabilities

    Capacity Planning and Predicting the Future

    Technical Factors

    Business Factors

    Management Factors

    Capacity Planning and Performance Management

    Capacity Planning and Business Planning


    2 The Metrics of Capacity Planning—Foundations


    Resource Categorization

    Resource Consumption Metrics

    Resource Usage and Performance Level Metrics for Capacity Projections

    Relative I/O Content (R) of Workloads

    Access Density (AD) of Disk Resident Data

    Process Density of DASD Resident Data (PDD)

    Process Density of Memory Resident Data (PDM)

    Data Remoteness Factor (DRF)

    Memory Access Density (MAD)

    Resource Exhaustion


    3 Business Elements and Service Levels


    Identifying Business Elements

    Statistical Analysis and Modeling

    Validating the Business Element Statistical Model

    Service Levels and Objectives

    Examples of Service Goals

    Service-Level Agreements

    Award Points

    Cost Controls and Chargeback


    4 Forecasting, Predictions, and Planning

    Planning vs. Forecasting

    Statistical Forecasting

    Probability and the Analysis of Risk

    Contingency—System Failure and Recovery

    Prediction, Forecasting, and Visualization


    5 Statistical Forecasting for Capacity Planning

    Trends and Patterns of Activity

    Regression Techniques for Capacity Planning

    Weighted Linear Regression—A Preference for the Recent Past

    Computing the Weights

    Complex Regression Combinations

    Forecast Monitoring and Revision

    Testing the New Model

    Prediction-Realization Diagram

    Testing a Working Model with Filter Trips and Tracking Signals

    Sum of Errors Method

    Summary of Forecast Monitoring

    6 Capacity Planning and Systems Optimization


    Example System Optimization Study for Batch Workloads


    Hardware Environment

    Software-Initiator Environment



    Job Classes

    Initiator Assignments of Job Classes

    Determining the Optimal Number of Initiators

    Initiator/TCB Time Data

    Determining the Optimal Number of Job Classes


    7 Capacity Planning for IBM MVS Data Storage Systems


    Disk Capacity Planning

    Evaluating Current Disk Capacity

    Evaluating Performance

    Estimating Future Requirements

    Evaluating Alternatives

    Changing Hardware

    Trend to System-Managed Storage (SMS)

    Software Available

    Tape and Tape Drive Capacity Planning

    Tape Processing—Evaluating Current Capacity

    Estimating Future Requirements

    Evaluating Alternatives

    Software Available

    Evolving Technologies

    Data Compression

    Optical Disks

    Automated Tape Libraries

    Redundant Arrays of Independent Disks (RAID)


    8 Charting and Graphics Presentations for Capacity Planning


    General Suggestions for Successful Data Presentation

    Labeling the Chart, Data, and Axes

    Bar Charts

    Pies, 3-D Charts, and 3-D Pies

    Charts Specifically Used in Capacity Planning

    Regression Analysis, Trends, and Curve Fitting

    Demonstrating Statistical Measures

    Use of Goal Lines

    Objects, Symbols, and Information


    9 Systems Administration and the Future of Capacity Planning

    Systems Administration

    Service-Level Management

    Problem Management

    Change Management

    Performance Management

    New Directions

    Systems Isomorphism and Business Elements


    Appendix: A Brief Summary of Soffware Useful for Capacity Planners



Product details

  • No. of pages: 230
  • Language: English
  • Copyright: © Academic Press 1994
  • Published: October 20, 1994
  • Imprint: Academic Press
  • eBook ISBN: 9781483266251

About the Author

Tim Browning

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