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IBM Systems Journal

Issue 2 • Date 1975

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Displaying Results 1 - 7 of 7
  • A program generator

    Page(s): 102 - 133
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (2351 KB)  

    We believe that the data processing needs of a major medical center do not differ fundamentally from those of government or industry. Experience in our environment is that data processing is playing an increasingly prominent role in the full spectrum of services. Not only is the number of applications increasing, but they are also becoming more diverse and imaginative as users become more directly involved in the process. View full abstract»

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  • Performance measurement tools for VM/370

    Page(s): 134 - 160
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (2209 KB)  

    The data collection, display, and analysis tools and techniques found desirable to support the smooth running of a VM/370 installation appear to be diverse, yet their use must be weel coordinated. In a summary, a user's productivity may be enhanced by linking the nature of his terminal activity to the performance of the system by making available to him measures of utilization and contention for major resources. Operators and system analysts may monitor the performance of the system in real time and attempt to diagnose and correct undesirable load situations. Full analysis of severe or complex performance problems may be conducted off-line when necessary and special user measurement requirements may be satisfied. Basic trends in resource utilization and system performance are available to management in summary form. Although these facilities have been developed and put to use subsequent to initial installation of the system, they appear to provide the kind of services that should be an integral part of control program functions, since they help users, maintenance programmers and installation management to strive toward making optimal use of their computing system. View full abstract»

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  • Elements of queuing theory for system design

    Page(s): 161 - 187
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (2027 KB)  

    The practical examples of the use of queuing models in computer system design and analysis have introduced basic principles and applications of queuing theory. These principles may serve as a useful introduction or review. The cited references and general references may be used to build upon this foundation by their presentations of more complex models, such as those that analyze machine interference and multiserver queues. View full abstract»

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  • Hierarchical approach to computer system integrity

    Page(s): 188 - 202
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1565 KB)  

    In this paper, we have shown how a hierarchically structured operating system can provide substantially better software reliability and security than a conventional two-level multiprogramming operating system approach. A virtual machine facility, such as VM/370, makes it possible to convert a two-level conventional operating system into a three-level hierarchically structured operating system. Furthermore, by using redundant security mechanisms, a high degree of security is attainable. View full abstract»

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  • Authors

    Page(s): 203 - 204
    Save to Project icon | PDF file iconPDF (883 KB)  
    Freely Available from IEEE
  • Abstracts

    Page(s): 205 - 207
    Save to Project icon | PDF file iconPDF (788 KB)  
    Freely Available from IEEE
  • Errata [Erratum]

    Page(s): 208
    Save to Project icon | PDF file iconPDF (1017 KB)  
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Aims & Scope

Throughout its history, the IBM Systems Journal has been devoted to software, software systems, and services, focusing on concepts, architectures, and the uses of software.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
John J. Ritsko
IBM T. J. Watson Research Center5