VSAM Tuning

LENGTH OF COURSE:
 1 Day

DESCRIPTION: This course covers the factors affecting VSAM performance and resource utilization, examines the interaction of critical VSAM components and discusses methods of ensuring an efficient VSAM environment. The materials presented in this course reflect the latest releases of VSAM, OS/390, and SMS.

PREREQUISITES: Students should have an understanding of VSAM concepts, terminology and IDCAMS.

INSTRUCTION TECHNIQUES: A combination of Lecture and Hands-On Labs (when/where available).

AUDIENCE

Application and System Personnel who require advanced knowledge of VSAM tuning techniques.
KEY HIGHLIGHTS:
  • Buffer space utilization to reduce I/O processing
  • Catalog listing and cluster definition parameters to detect and eliminate wasted DASD space
  • "Define cluster" parameters to speed up I/O processing
  • Free space usage to reduce I/O processing
  • Overview of VSAM internal structures
  • Concepts of fine tuning
  • Control Interval (CI) and Control Area (CA) splits
  • Glossary and features of fine tuning
  • Physical storage media
  • Cache DASD controllers
  • CI size and record size
  • Space allocation parameters
  • IMBED and REPLICATE
  • Techniques for using free space
  • Other performance-related parameters
  • Space estimation for data sets


  • Buffer management
  • CICS environments - NSR
  • CICS environment - LSR


FROM OUR STUDENT EVALUATIONS...
"Instructor was willing to answer questions that deviated from prepared materials."

Carol A. Nida
State of Maryland

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