Types of Concurrency Control Mechanisms
There are 2 types of concurrency control mechanisms as shown below diagram:
Types of Concurrency Control Mechanism
Concurrency Control in Distributed Transactions
Concurrency control mechanisms provide us with various concepts & implementations to ensure the execution of any transaction across any node doesn’t violate ACID or BASE (depending on database) properties causing inconsistency & mixup of data in the distributed systems. Transactions in the distributed system are executed in “sets“, every set consists of various sub-transactions. These sub-transactions across every node must be executed serially to maintain data integrity & the concurrency control mechanisms do this serial execution.