My shop have a VSAM KSDS Master File containing about a million records. There is a transaction file generated daily containing few hundred records. Date and Time are part of the key of the KSDS, so never issue of duplicates.
Daily we need to merge the transaction file into the master file. My query is what will be the most efficient way in terms of processing time to do this merge. Currently we are doing it through SORT. Can somebody please guide me with the different options, and the most time efficient of them in their views.