Space announcement

   

This space provides the same content as before, but the organization of the home page has changed. The content is now organized based on logical branches instead of legacy book titles. We hope that the new structure will help you quickly find the content that you need.

Dynamic allocation output image copy data sets

NGT Recover uses the OUTPUT command for dynamic allocation of output image copy data sets. The dynamic allocation feature allows you to make image copies of spaces without including DD statements in the JCL. Instead of using DD statements (each of which provides a physical description of only a single data set) you can use the directives (output descriptors) to provide a logical view of how copy data sets are to be created.

The effects of allocating copy data sets dynamically with NGT Recover follow:

  • Eliminate large, complex DD statements

  • Greatly simplify tape stacking

  • Restart a failed job automatically (no JCL or other statements to change)

  • Release unused space when a copy data set is closed

  • Use symbolic variables and generation data groups (GDGs) to assist in data set name generation

Note

Dynamic allocation of output copies is required for spaces with more than 254 partitions.

Because an output descriptor is not directly associated with a particular data set, you can use an output descriptor to describe multiple copy data sets. (For JCL examples, see Examples of NGT Recover jobs.)

This section contains the following topics:

Related topic

Was this page helpful? Yes No Submitting... Thank you

Comments