How does MySQL master-slave synchronization be implemented?

Generate two threads from the library, an I/O thread, a SQL thread, the I/O thread requests the binlog of the main library, and writes the resulting binlog log to the relay log (trunk log) file; The main library generates a log dump thread to path from the library I/O line Binlog The SQL thread reads the log from the relay log file and resolves it to a specific operation to achieve the same master-slave operation, with the final data consistent.

Detailed implementation process:

http://quliren.blog.51cto.com/9849266/1899877

How does MySQL master-slave synchronization be implemented?