Easysoft Data Access (EDA) for System Z users can still use legacy System Z applications to update and read their data. To make sure that EDA for System Z doesn't lock these applications out and vice versa, EDA supports all C-ISAM locking modes. This means that once the appropriate locking mode is chosen, EDA for System Z and other applications can access the files concurrently. EDA for System Z only takes an exclusive record-level lock when updating. At all other times, it opens the ISAM file read-only. This ensures that the data is freely available to all other applications.
Note that this article only applies to Zortec customers who use C-ISAM as their back end data files.
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