how mysql master-slave replication works

How does data replication occur from the master to the slave server in MySQL?

In MySQL master-slave replication, data is replicated from the master server to one or more slave servers. When a transaction is committed on the master server, the binary log records all the data manipulation statements. These statements are then read by the slave server's I/O thread and executed on the slave server. The SQL thread on the slave server is responsible for executing the write operations and keeping the data in sync with the master server.

What are the different types of replication modes in MySQL and how do they differ?

There are three main replication modes in MySQL:

• Statement-based replication: In this mode, the master server sends the exact SQL statements that were executed on the master to the slave server. The slave server then executes the same statements on its own database. This mode is easy to set up and manage, but it can be inefficient because it replicates all the SQL statements, even those that do not affect the data.
• Row-based replication: In this mode, the master server sends only the changes that were made to the data on the master to the slave server. The slave server then applies these changes to its own database. This mode is more efficient than statement-based replication, but it can be more difficult to set up and manage.
• Mixed-based replication: This mode is a hybrid of the statement-based and row-based replication modes. It sends the SQL statements that were executed on the master to the slave server, but it also sends the changes that were made to the data on the master. This mode is more efficient than statement-based replication, but it is not as efficient as row-based replication.

How can I configure and implement master-slave replication in a MySQL environment?

To configure and implement master-slave replication in a MySQL environment, you will need to:

1. Create a new user on the master server that will be used by the slave server to connect to the master.
2. Grant the new user the REPLICATION SLAVE privilege.
3. Start the slave server and connect it to the master server.
4. Configure the slave server to use the new user and password.
5. Start the I/O thread on the slave server.
6. Start the SQL thread on the slave server.

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