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z/OS Internals


Duration: 5.0 days

Method: Instructor led, Hands-on workshops

Price: $3400.00

Course Code: MF5010


Experienced systems programmers with a need for a more detailed understanding of z/OS functions.


This course provides a detailed examination of z/OS for systems programmers. Topics include an introduction to computer systems hardware and an exploration of z/OS architecture, system services and functions, storage management mechanisms, and I/O processes. Each section will also explore the associated control block structures associated with the z/OS operations being looked at.


Due to the technical nature of this material, the student should have several years experience in the z/OS environment.


  • I. Introduction to Computer Systems Architecture
    • Examine Processor Architecture and its Role in Supporting z/OS Facilities.
    • Introduction to Storage Hierarchy: L1 and L2 Cache Memories and Various Architectural Enhancements to Enable Processors to Achieve their Rated Speeds.
    • Review of Processor Power Ratings and their Associated Metrics
  • II. z/OS Architecture
    • Interrupt Handling and SVC Functions
    • Address Space Structure
    • Cross Memory Services
    • Logical Partitioning (LPAR)
  • III. System Initialization (IPL)
    • IPL Process Details
    • IPL Program Functions
    • Nucleus Initialization Program
    • Master Scheduler Initialization
  • IV. System Services and Functions
    • Role of z/OS Dispatcher
    • Task Management
    • Resource Serialization
    • Recovery/Termination Management
    • Virtual Lookaside Facility (VLF)
  • V. Storage Management Mechanisms
    • Real Storage Management:
      • Central and Expanded Storage Usage
    • Virtual Storage Management:
      • Paging/Swapping Mechanisms
    • Auxiliary Storage Management
  • VI. I/O Processing
    • Introduction to DASD Hardware Functions:
      • CKD, ECKD, and FBA Devices
      • Parallel Access Volumes (PAV)
      • Volume Affinity
    • Disk Arrays (RAID)
    • Components of I/O Operation:
      • Introduction to Channel Command Processing
    • Access Method Services
    • Caching Mechanisms
  • VII. z/OS Exploitation Opportunities
    • Dataspaces/Hiperspaces
      • Access Register Usage
    • Batchpipes
    • Hiperbatch/DLF
    • Batch LSR
    • Parallel Sysplex
    • Data Buffering
  • VIII. z/OS Workload Management
    • Introduction to WLM Goal Mode
    • Metrics Associated with Performance Objectives
    • Basic Control Mechanisms of WLM
  • IX. z/OS Enhancements
    • 64-bit Storage Addressability
    • WLM Enhancements
      • Intelligent Resource Director
      • Workload Licensing