VSAMDD data sets
UNLOAD PLUS requires this data set if you specify the INFILE option to unload from a VSAM linear data set instead of a Db2 table space.
You can use either the default ddname (VSAMDD) or a ddname that you specify by using the INFILE VSAMDDPREFIX command option. Use the VSAMDDPREFIX option if you are unloading a partitioned object with more than 99 partitions.
For multiple partitions, add the partition number as a suffix to the ddname that you specify in your JCL.
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