z/OS Basic Skills Information Center. z/OS concepts

• Publisher: IBM Corporation
• Year: 2010
• Tongue: English
• Leaves: 120
• Category: Library

✦ Table of Contents

Contents
Introduction to z/OS
Chapter 1. z/OS operating system: Providing virtual environments since the 1960s
Hardware resources used by z/OS
Multiprogramming and multiprocessing
z/OS programming constructs: Modules, macros, components and control blocks
Physical storage used by z/OS
What is virtual storage?
What is an address space?
What is dynamic address translation?
How z/OS uses physical and virtual storage
How virtual storage addressing works in z/OS
What is paging?
How paging works in z/OS
Swapping and the working set
What is storage protection?
The role of storage managers
A brief history of virtual storage and 64-bit addressability
What is meant by “below-the-line” storage?
What's in an address space?
System address spaces and the master scheduler
What is workload management?
I/O and data management
Supervising the execution of work in the system
What is interrupt processing?
Dispatchable units of work: Tasks and service requests
Preemptable versus non-preemptable units of work
What does the dispatcher do?
Serializing the use of resources
Defining characteristics of z/OS
Additional software products for z/OS
Middleware for z/OS
A brief comparison of z/OS and UNIX
Chapter 2. z/OS storage constructs: File systems, data sets, and more
What is a data set?
Quick reference: Data set structure
Where are data sets stored?
What are access methods?
What are DASD volumes and labels?
Allocating a data set
How are data sets named?
How is space allocated on DASD volumes?
Data set record formats
Types of data sets
Why is a PDS structured like that?
What is a PDSE?
What happens when a data set runs out of space?
What is VSAM?
What is a VTOC?
What is a catalog?
What is a generation data group?
Role of DFSMS in managing space
z/OS UNIX file systems
z/OS data sets versus file system files
What is a zFS file system?
Chapter 3. Interacting with z/OS: TSO, ISPF, and z/OS UNIX interfaces
What is TSO?
What is TSO native mode?
How are CLISTs and REXX used?
What is ISPF?
ISPF keyboard keys and functions
The ISPF Data Set List utility
The ISPF editor
The ISPF Settings menu
What is z/OS UNIX?
ISHELL command (ish)
OMVS command shell session
Direct login to the z/OS UNIX shell
Chapter 4. Processing work on z/OS: How the system starts and manages batch jobs
What is batch processing?
What is JES?
What does an initiator do?
Batch processing and JES: Scenario 1
Batch processing and JES: Scenario 2
Job flow through the system
JES2 compared to JES3
Chapter 5. Doing work on z/OS: How you submit, control and monitor jobs using JCL and SDSF
What is JCL?
How is a job submitted for batch processing?
What is the System Display and Search Facility (SDSF)?
Chapter 6. Parallel Sysplex: Worth the effort for continuous availability
Benefits of Parallel Sysplex: No single points of failure
Benefits of Parallel Sysplex: Capacity and scaling
Benefits of Parallel Sysplex: Dynamic workload balancing
Benefits of Parallel Sysplex: Ease of use
Benefits of Parallel Sysplex: Single system image
Benefits of Parallel Sysplex: Compatible change and non-disruptive growth
Benefits of Parallel Sysplex: Application compatibility
Benefits of Parallel Sysplex: Disaster recovery
Notices
Programming interface information
Trademarks