Use the PDSEv2 Generations view to browse, compare, copy, and delete partitioned data set extended version 2 data set member generations.
Partitioned data set extended version 2 (PDSEv2) can retain a number of generations of data set members. Generations of a PDSEv2 member are identified by numbers. The current generation is always 0, and previous generations are numbered with positive integers. If a PDSEv2 member has 10 generations, for example, the current generation is 0, the oldest generation is 1, and each subsequent generation number is incremented by 1.
When you allocate a PDSEv2, you specify the maximum number of generations. The default value is 0. When a PDSEv2 member exceeds the maximum number of generations, the oldest generation is discarded. Data set I/O functions, such as read, write, rename, or delete, operate on the current generation.
You can use the PDSEv2 Generations view to browse, compare, copy, and delete partitioned data set extended version 2 data set member generations. For more information about PDSEv2 member generations, see the related topics.