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Using the Basic Indexed Sequential Access Method (BISAM) z/OS DFSMS Using Data Sets SC23-6855-00 |
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BISAM cannot be used to create an indexed sequential data set. BISAM directly retrieves logical records by key, updates blocks of records in-place, and inserts new records in their correct key sequence. Your program must synchronize all I/O operations with a CHECK or a WAIT macro. Other DCB parameters are available to reduce I/O operations by defining work areas that contain the highest level master index and the records being processed. |
Copyright IBM Corporation 1990, 2014
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