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Chapter 2. Transactions and Concurrency Control - Pg. 11

tRAnSACtIonS AnD ConCURRenCY ContRoL In the old days when we lived in caves and used mainframe com- puters with batch file systems, transaction processing was easy. You batched up the transactions to be made against the master file into a transaction file. The transaction file was sorted, edited, and ready to go when you ran it against the master file from a tape drive. The output of this process became the new master file 2