Synchronization (computer science)
（重定向自Process synchronization）
![Figure 1: Three processes accessing a shared resource (critical section) simultaneously.](/Images/godic/202502/04/Multiple_Processes_Accessing_the_shared_resource2009.png")
![Figure 2: A process accessing a shared resource if available, based on some synchronization technique.](/Images/godic/202502/04/Shared_Resource_access_in_synchronization_environment2009.png")
![Figure 3: Changes from both server and client(s) are synchronized.](/Images/godic/202502/04/Data_Synchronization2009.png")
In computer science, synchronization refers to one of two distinct but related concepts: synchronization of processes, and synchronization of data. Process synchronization refers to the idea that multiple processes are to join up or handshake at a certain point, in order to reach an agreement or commit to a certain sequence of action. Data synchronization refers to the idea of keeping multiple copies of a dataset in coherence with one another, or to maintain data integrity. Process synchronization primitives are commonly used to implement data synchronization.