File Sharing
When Btrieve needed to do file sharing to gain access to records, two different types of file sharing modes could be used: Single Engine File Sharing (SEFS) mode, and Multi Engine File Sharing (MEFS) mode. SEFS only allowed the clients that accessed that engine to alter the database, other clients that accessed a different engine could not gain access to the database. MEFS allows different clients running under different engines to access the database.
Read more about this topic: Architecture Of Btrieve
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