z/OS Internals

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Duration: 5 Days

Method: Instructor led, Hands-on workshops

Price: $3250.00

Course Code: MF5010

Audience

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

Description

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.

Prerequisites

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

Topics

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