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Chapter 7: Systems Management. Chapter objectives. After completing this chapter, you will be able to: Understand system management disciplines Understand the different data types z/OS uses Understand how errors are handled. Introduction to systems management.

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Chapter objectives
Chapter objectives

  • After completing this chapter, you will be able to:

    • Understand system management disciplines

    • Understand the different data types z/OS uses

    • Understand how errors are handled


Introduction to systems management
Introduction to systems management

  • Systems management is a general term that is widely used, and whose meaning is context dependant. In some cases systems management means the operator interface, while in others, it means provisioning capacity.

  • In a large-scale commercial system, systems management usually is considered to be “A collection of disciplines aimed to monitor and control a system’s behavior.”


Introduction to systems management1
Introduction to systems management

  • Performance management

  • Workload management

  • Configuration management

  • Operations management

  • Problem management

  • Network management

  • Storage management

  • Security management

  • Change management


System data
System Data

  • Accounting

  • Reporting

    • Performance

    • Errors



Z os component smf
Z/OS component SMF

Collect info concerning:

  • Billing users

  • Reporting reliability

  • Analyzing the configuration

  • Scheduling jobs

  • Summarizing direct access volume activity

  • Evaluating data set activity

  • Profiling system resource use

  • Maintaining system security


Workload management
Workload management

  • WLM retains the following data:

  • CPU time used

  • Memory used + pages/sec

  • I/Os done + I/O rate

  • Transaction rate

  • Goal achievement



Performance management
Performance management

  • Performance management is a key discipline in the systems management area. It includes measuring, analyzing, reporting, and tuning the performance of IT resources.

  • Two categories:

  • Real-time monitoring, alerting, problem identification, and problem resolution.

  • Bench marking, modeling, rerunning problem scenarios, and trending performance metrics feeding capacity planning.


Performance management1
Performance management

  • Objectives:

  • Optimize response time and throughput of IT resources

  • Take corrective actions to alerts and problem requests


Performance management z os implementation
Performance management : z/OS implementation

  • Resource Measurement Facility (RMF):

  • Batch monitoring

    • CPU

    • Storage

    • Workload

    • I/O Activity

    • Other

  • Online monitoring

  • Delay monitoring


  • Configuration management
    Configuration management

    • In a large-scale commercial system, the number of hardware devices, system software items (compiled modules, source modules, data items, etc.), and application software items has been large since the first days of the mainframe.


    System software configuration management
    System Software configuration management

    • SMP/E characteristics:

    • Large number of components.

    • Great packing flexibility.

    • A backward compatibility need.

    • Different software developers and vendors.

    • Long-supported versions.


    System software configuration management1
    System Software configuration management

    • 4 types of SYSMODs:

    • PTF

    • APAR

    • FUNCTION

    • USERMOD


    Hardware configuration management
    Hardware configuration management

    • Hardware Configuration Definition (HCD) becomes useful after:

    • It is written in a system file.

    • Must be split between the hardware and the software.

    • Has to be tested.

    • Has to be activated sysplex-wide


    Application configuration management
    Application configuration management

    • Application configuration management is a discipline that is common to any platform. On a IBM System z platform these tools must be able to manage Java (WebSphere Application Server) as well as COBOL applications. IBM’s tool is named Software Configuration and Library Manager (SCLM).


    Operations management
    Operations management

    • Operations in a large-scale commercial operating system is crucial for performance and availability.

    • Operations means 2 related activities:

    • Batch scheduling

    • Console operations


    Problem management
    Problem management

    • Problem management is a discipline that can be viewed from various angles:

      • How problems are solved

      • How problems are reported

      • How problems are tracked

    • What is system managed:

    • Trend reporting

    • Master console


    Network management
    Network management

    • z/OS participates as any other node on the network and complies to the standards in this area (SNMP communication, for instance). On such networks, the z/OS network management subsystem usually acts as the focal point.


    Storage management
    Storage management

    • In z/OS the software that manages the external storage devices is called DFSMS.


    Security management

    INTERNET

    BtB

    Users

    Legend

    Policy

    Manager

    Policy Director Manager

    Intrusion

    Detection

    System

    WebSeal

    TIVOLI

    SecureWay Directory

    Switch

    WebSeal

    INTRANET

    WebSeal

    Switch

    ...

    IDS

    LPAR

    DMZ Internet

    LPAR

    DMZ Internet

    LPAR

    DMZ Internet

    IBM System z

    FireWall

    FireWall

    FireWall

    Web Services

    Web Services

    Web Services

    Users

    Production LPAR

    VPN

    Security management


    Change management
    Change management

    • Change management is a discipline that is meant for the whole infrastructure. z/OS does to manage changes applied to software through SMP/E asking for prerequisites and logging changes.


    Summary
    Summary

    • 9 system management disciplines

    • Service Level management is not covered

    • Security management is special

    • Tools are available

    • Pay attention to all the system components !


    Key terms in this chapter

    APAR

    Change management

    Configuration management

    FUNCTION

    HCD

    Network management

    Operations management

    Problem management

    PTF

    RMF

    Security management

    SMP/E

    Storage management

    System management

    System Data

    USERMOD

    Workload management

    Key terms in this chapter


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