What in a distributed database supports multi-user access?
Concurrency control in a distributed database supports multi-user access.
Concurrency control ensures that correct results for concurrent operations are generated, while getting those results as quickly as possible.
Concurrency control:-
Concurrency control is a database management systems (DBMS) concept that is used to address conflicts with the simultaneous accessing or altering of data that can occur with a multi-user system.
Multiuser database system:-
A multiuser database system must allow multiple users access to the database at the same time. As a result, the multiuser DBMS must have concurrency control strategies to ensure several users access to the same data item at the same time, and to do so in a manner that the data will always be correct data integrity.
Distributed database:-
A distributed database is a database in which not all storage devices are attached to a common processor. It may be stored in multiple computers, located in the same physical location; or may be dispersed over a network of interconnected computers.