We can host this training at your preferred location. Contact us!

This hands-on course describes and explains the access method concepts in MVS and the structure and design of VSAM files. It teaches how to create VSAM files using the utility Access Method Services (AMS), both from a functional as well as a performance point of view.<br>Additionally, it provides the Systems Programmer and Operational Analyst with information on the structure of ICF catalogs and the related VTOC and Index VTOC.<br>Online exercises provide experience in creating, accessing and managing VSAM files. Attendees will create and use clusters, alternate indexes and paths.<br><br>This course is also available for one-company, on-site presentations and for live presentation over the Internet, via the Virtual Classroom Environment service.

Familiarity with basic z/OS principles and a working knowledge of TSO/ISPF and JCL.

describe and explain the concepts of the z/OS access methods
analyse the structure of the RRDS, ESDS, KSDS and LDS data sets
use the Access Method Services utility program IDCAMS to define, load, backup, monitor and manipulate VSAM data sets with particular emphasis on the KSDS file type
develop guidelines for optimised allocation of VSAM files for use at their installation
identify performance related issues in the batch and online environments that can be found when using the KSDS file type.

VSAM Overview

MVS and I/O processing; The access methods; The IOS Drivers; The I/O Supervisor (IOS); The Back-End process; MVS access methods; Queued Sequential Access Method; Basic Direct Access Method; Basic Partitioned Access Method; PDSE processing; And now to VSAM; VSAM features; Entry Sequenced Data Set (ESDS); Key Sequenced Data Set (KSDS); Relative Record Data Set (RRDS); Catalog concepts; ICF catalogs and VTOCS; ICF catalogs (BCS); VSAM Volume Data Set (VVDS); Cluster Catalog (BCS) entries; Alternate indexes and paths; VSAM overview - exercises.

VSAM Dataset Structure

Control Areas; Control Intervals; Control Interval structure; CI structure of fixed length records; CI structure of variable length records; Control Area structure ; elative Byte Address; Spanned records; Storage of data on DASD volumes; Entry Sequenced; Key Sequenced; Index component; Free space; RRDS characteristics; KSDS processing example; The Control Interval is rewritten; Deleting a record; Record insertion; CI split; CA split; VSAM dataset structure - exercises.

Using Access Method Services

Access Method Services (AMS); AMS command format; Example - define an ESDS; Modal commands; Cancelling IDCAMS steps; Using the ELSE and SET commands; Comments; Error messages; Dataset already exists.

Defining VSAM Datasets

IDCAMS commands; DEFINE command - main parameters; Defining a cluster; Cluster sub-parameters; IDCAMS required parameters; Space allocation and reuse; SHAREOPTIONs (x region, y system); Control Interval Size; More IDCAMS parameters; DATA and INDEX sub-parameters; Defining an ESDS; Defining an RRDS; Defining a KSDS; FREESPACE; DELETE MASK | NOMASK.

Listing Catalog Information

Listing catalog information - LISTCAT; Catalog information; LISTCAT; LISTCAT parameters; LISTCAT examples; LISTCAT output.

VSAM Dataset Management

VSAM data management commands; Loading datasets; REPRO; REPRO parameters; Copy ESDS to KSDS; Copy partial RRDS to RRDS; Copy keyrange from KSDS to KSDS; Merge two KSDSs; Copy KSDS to tape; Printing datasets; PRINT parameters; PRINT examples; PRINT output example - CHARACTER; Altering catalog entries; Deleting catalog entries; DELETE parameters; DELETE examples.

Alternate Indexes

Why use alternate indexes?; Alternate index design; Alternate index record; Defining a route to the base cluster; Update of an alternate index; Defining an alternate index; Alternate index sub-parameters; Alternate index (SMS); AIX record size calculation; Building an alternate index; Defining a Path; Printing a base KSDS; Printing via an alternate indexes using PATH.

VSAM Data Integrity

Data integrity; Disposition processing; VSAM SHAREOPTIONS; Cross system sharing; VSAM back-up options; The EXPORT command; VSAM recovery options; The IMPORT command.

VSAM Performance Considerations

What to tune; Record design considerations; Data CISZ and performance; CI% freespace; CI FSPC optimisation; Index CISZ considerations; Data CA size considerations; CA% freespace; Component level performance; VSAM buffers; Index component buffers; Optimum index buffering; Data component buffers; Optimum data component buffering; VSAM buffering techniques; VSAM NSR buffer utilisation; VSAM LSR buffer utilisation; Batch LSR; Is batch LSR the solution?; Batch LSR JCL changes; Additional BLSR SUBSYS parameters; BLSR recommendations; BLSR restrictions; AIX performance considerations.

VSAM Essentials Workshop Training Course in Finland

Finland is a country located in northern Europe. Helsinki is the capital and largest city of the country. The majority of the people are Finns but there is also a small Lapp population in Lapland, where the country is famous for the Northern Lights. Finland's national languages are Finnish and Swedish.

Known for its vast forests, lakes, and natural beauty, Finland is one of the world's largest producers of forest products, such as paper, pulp, and lumber. One of the world's largest sea fortresses Suomenlinna, Rovaniemi with the "White Nights", dogsled safaris and of course the Northern Lights are what makes Finland so popular for tourists. Finland is one of the best places in the world to see the Northern Lights and attracts millions of tourists during its seasons.

Finland is home to a thriving technology industry and is widely recognized as one of the world's leading technology hubs. Companies such as Nokia and Rovio (creator of the popular game Angry Birds) are based in Finland. Some of the key factors that have contributed to Finland's success in technology include; strong investment in research and development, a highly educated workforce and fundings.

Finland has a strong educational system, and is widely regarded as one of the world's most literate countries. In fact, Finland's literacy rate is one of the highest in the world, and its students consistently perform well in international tests of math and reading ability.

Also, as a pioneer in environmental sustainability, Finland is known for its efforts to reduce its carbon footprint and promote clean energy. This Nordic country is also famous for its unique and distinctive cultural heritage, including its traditional folk music and its elaborate traditional costumes.

Helsinki, Finland's capital city, is the country's business center. Helsinki is Finland's largest city, and it is home to many of the country's major corporations and organizations, including many of the country's leading technology firms. The city is also a commercial, trade, and financial center, as well as one of the busiest ports in the Nordic region.

Take advantage of our diverse IT course offerings, spanning programming, software development, business skills, data science, cybersecurity, cloud computing and virtualization. Our knowledgeable instructors will provide you with practical training and industry insights, delivered directly to your chosen venue in Finland.

VSAM Essentials Workshop Training in Finland

Upcoming Trainings

VSAM Essentials Workshop Training in Finland

Prerequisites

What You Will Learn

Outline

Upcoming Trainings