This course is designed for experienced IMS programmers who need to learn the concepts and practical application of Fast Path databases. Fast Path databases and their processing requirements are covered in detail.

Experienced IMS applications staff who have responsibility to write programs using Fast Path databases and transactions.

Upon successful completion of this course, the student will be able to:

• Describe the processing available for IMS Fast Path databases
• Code application programs accessing Fast Path databases
• Code applications using Fast Path transactions

• Introduction to IMS Fast Path
• Main Storage Database Characteristics, Use, Processing, and DBDs
• Use of the FLD Call
• DEDB Characteristics and Processing
• Fast Path Status Codes
• Subset Pointers
• Use of POS Call
• Sequential Dependent and Direct Dependent Segments
• Unit of Work, Dependent and Independent Overflow
• Database and PSB Definition
• Fast Path Utilities
• Coding Considerations: MSDBs, DEDBs, Fast Path Buffers, Status Codes
• Checkpoint Considerations
• MSDB and DEDB Utility Overview
• Expedited Messages

Experience designing, using or supporting IMS full function databases.