timestamp-based concurrency control

In computer science, a timestamp-based concurrency control algorithm is a non-lock concurrency control method. It is used in some databases to safely handle transactions, using timestamps. Operation Assumptions Every timestamp value is unique and accurately represents an instant in time. A higher-valued timestamp occurs later in time than a lower-valued timestamp. Generating a timestamp A number of different ways have been used to generate timestamp Use the value of the system's clock at the start of a transaction as the timestamp. Use a thread-safe shared counter that is incremented at the start of a transaction as the timestamp. A combination of the above two methods.