The subsystem implementing transaction persistence in DBMS is ()

DBMS The subsystem that implements transaction persistence in is ( )
A. Security management subsystem
B. Integrity management subsystem
C. Concurrency control subsystem
D. Recovery management subsystem

answer
D

analysis
Atomicity ： A transaction is a group of indivisible units of operation , This group of units either succeed or fail at the same time （ from DBMS Transaction management subsystem ）;

Uniformity ： The data integrity before and after the transaction should be consistent （ from DBMS The integrity subsystem performs test tasks ）;

Isolation, : The transactions of multiple users should not affect each other , Be isolated from each other （ from DBMS Implementation of concurrency control subsystem ）;

persistence : Once a transaction is committed , Then its impact on the database is permanent and irreversible , If you roll back later or an exception occurs , Will not affect committed transactions （ from DBMS The recovery management subsystem of ）;