Data Management Macro Instructions

You can use assembler language macro instructions to create, maintain, and process all the data set types supported by the access methods described in DFSMSdfp Access Methods. Macro instructions control data set allocation, input and output, and data security.

Each compiler provides facilities to create, read, and write data sets. Your compiler documentation describes how to use the access method facilities.

The following are a few of the functions that the macro instructions perform:

Control block macros generate information that the access method needs to process the data sets.
Request macros retrieve, update, delete, or insert logical records into data sets.
Checkpoint/restart functions establish checkpoints during a program and restart the job at a checkpoint or at the beginning of a job step.