Stacking Logic

The CTTSBD utility augments the Control-M/Tape Dynamic Dataset Stacking facility by allowing multiple pre-existing data sets to be copied and stacked according to specified criteria.

Data sets are placed on output volumes according to stacking parameters and runtime parameters specified by the user.

Output data set size is calculated according to the known size of input data sets and runtime information about output volumes. The output data set size is used to determine whether there is sufficient space in a given volume chain to stack the data set.

Output data sets are stacked only on volumes that became active during the current run of the CTTSBD utility. If no appropriate volume is found, the data set is written on a scratch volume.