KD2_PFnn_HIS_SEQ_TYP
The KD2_PFnn_HIS_SEQ_TYP parameter specifies the storage mechanism.
- Description
- If you specified VSAMSEQ, VSAMSEQTHVSAM, or SEQTHVSAM, you can choose one of the following 3 alternatives to store trace data in sequential files:
- S - Static sequential
- Static sequential data sets are used for trace data collection. When the first data set is full, the Near-Term History Data Collector switches to the next available data set. When the last available data set in the sequence is full, the Near-Term History Data Collector switches to the first data set in the sequence again and overwrites the data in the first data set. Each time the Near-Term History Data Collector switches to a full sequential data set to overwrite it, you can archive its content to additional sequential data sets.
- D - Dynamic sequential
- The Near-Term History Data Collector always allocates a new data set when the currently used data set becomes full. As a result, the collected data is not overwritten.
- G - GDG
- A Generation Data Group (GDG) is used. The mechanism is similar to the one described for the storage type Static sequential. When all data sets are full, the Near-Term History Data Collector overwrites the trace data in the first data set. However, in a GDG, the z/OS, not the Near-Term History Data Collector, switches between the different data set generations. For this alternative, archiving is not supported.
- Default value
- D
- Permissible values
- S, D, G