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This article mainly introduces "what aspects are reflected in the high availability of MySQL and Redis". In daily operation, I believe many people have doubts about the high availability of MySQL and Redis. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the questions of "what aspects are reflected in the high availability of MySQL and Redis?" Next, please follow the editor to study!

It mainly reflects these aspects: MySQLReplication is the master-slave synchronization solution officially provided by MySQL; Sentinel is the high-availability solution officially provided by Redis for clusters; and the main functions of Sentinel.

A) MySQLReplication is a master-slave synchronization scheme officially provided by MySQL, which is used to synchronize the data of one MySQL instance to another instance.

Replication makes an important guarantee for data security, and it is also the most widely used MySQL disaster recovery scheme. Replication sets up a MySQL master-slave replication cluster with two or more instances, provides single-point writing and multi-point reading services, and realizes the read scaleout.

B) Sentinel is a high availability solution officially provided by Redis for clusters. In the actual project, sentinel can be used to do Redis automatic failover to reduce the workload of human intervention. In addition, sentinel also provides the client with the notification of monitoring messages, so that the client can judge the status of the server according to the message type and do the corresponding adaptation operation.

C) the following is a list of the main features of Sentinel:

D) Monitoring:Sentinel continuously checks the status of master and slave in the cluster to determine whether it is alive.

E) Notification: if a dead Redis instance is found, Sentinel can notify the system administrator or other program scripts through API.

F) Automaticfailover: if a master dies, sentinel immediately initiates a failover and promotes a slave to master. Other slave reconfigurations point to the new master.

G) Configurationprovider: sentinel notification is valid and reliable for the client. The client will connect to the sentinel to request the address of the current master, and in the event of a failure, the sentinel will provide the new address to the client.

At this point, the study on "what is the high availability of MySQL and Redis?" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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