MVS: Fundamentals of MVS and JES

Synopsis
MVS: Fundamentals of MVS and JES presents an overview of the MVS environment, including JES2, JES3 and the SMS facility.

The material in this course applies to all releases of the MVS operating system since the original release of MVS/ESA. The majority of the concepts presented can be used in all releases of MVS.

Information that is specific to a particular release of MVS (for example: OS/390 MVS) will be clearly labeled. Otherwise, when you see MVS in this course, it refers to MVS/ESA and all subsequent releases.

Audience
This course is for programmers and end users who work in an MVS environment.

Time
5 - 9 hours

Product Code: MVS101

After completing MVS: Fundamentals of MVS and JES, the user should be able to:

Describe the main functions performed by MVS

Explain how MVS uses virtual memory

Explain how MVS processes multiple tasks

Describe how jobs are processed by the Job Entry Subsystem (JES)

Explain how MVS stores, organizes and accesses data

Describe the impact of System Managed Storage (SMS) on MVS processing

MVS Overview
Introduces the MVS Operating System.

Introduction to MVS
Definition and history.  Functions performed.

System Hardware Components
Processors and I/O devices.  Channel subsystems and paths.  Data communications equipment.  Sysplex hardware.

MVS Functional Areas
Describes the four categories of functions that MVS performs.

Memory and Task Management
Virtual memory.  Task dispatching priorities.

Job Management (JES2)
JCL statements.  Purpose of JES.  Job flow.  Job and output classes.

Job Management (JES3)
Job flow.  JES3 complexes.  Job classes and job groups.  Output classes.

Data Management
Terminology.  File organizations.  Access methods.  Data set organization.  Record formats.

MVS Tools and Facilities
Describes many IBM tools and facilities available for use with the MVS operating system.

System Managed Storage (SMS)
Benefits of SMS.  SMS classes.  ACS routines.  Data set life cycle.

Related Subsystems
Brief descriptions of numerous tools and facilities including TSO, ISPF, CICS, DB2, IMS, RACF, DFSMS, DFSORT and WLM.