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The Dynamic Data Set Stacking facility automates and manages the creation of multiple files on a physical volume, while remaining totally transparent to the user. Control-M/Tape coordinates the entire administrative effort.
Control-M/Tape implements dynamic stacking during real-time processing. Instead of creating a data set on a scratch volume, Control-M/Tape can create the data set on a volume that already contains files but has enough free space. Control-M/Tape uses volume information to calculate the free space remaining on the volume. The amount of space required to hold the data set is calculated based on how much space previous versions of the data set required. Job parameters are changed automatically to direct the data set to the appropriate volume.
Stacking is enabled or disabled depending on user specified rules. In addition, the desired percentage utilization of all media is specified.
Control-M/Tape performs intelligent stacking by grouping data sets that have common characteristics (for example, similar expiration dates, same pool) on a single volume.
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