Native DataFlex database

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The native DataFlex database is a ISAM based database. Since VDF 11, the native DataFlex database is also called the "embedded" database. This is not a client/server database so that each application connects to the datafile directly. As a result, windows networking optimisation techniques such as opportunistic locking can cause your database files to corrupt.

External Links

Regcheck package for automatically disabling oplocks

Opportunistic Locking and Read Caching on Microsoft Windows Networks