Why GDG (+1) was resolved to an existing GDG file with Encore?

Products

• ESP Workload Automation

Issue/Introduction

Job A ran and created GDG Gen 02 with DISP=(NEW,CTLG,KEEP), then the job failed.

Job B that uses the same GDG ran later but created the same GDG Gen 02 which was created in above job.

Why would Job B use the same GDG gen as Job A?  We would expect it to create GDG Gen 03.

 

Environment

Release : 12.0

Resolution

If the job did not finish successfully, the newly created GDG generation is not rolled-in into the GDG base (it is deferred) and is created only as a standalone dataset, however with the GDG-like name.

If the new GDG generation would be requested with relative generation number (+1), the name used for that deferred generation will be "reused", the generation dataset would be reclaimed.