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What is the difference between redis master and slave and cluster? This problem may be often seen in our daily study or work. I hope you can gain a lot from this question. The following is the reference content that the editor brings to you, let's take a look at it!

Master and slave:

Through persistence, Redis ensures that no data is lost (or a small amount) even if the server is rebooted, because persistence saves in-memory data to the hard disk, and rebooting loads data from the hard disk. . However, because the data is stored on a server, if the server has problems such as hard disk failure, it will also lead to data loss.

To avoid a single point of failure, it is common practice to replicate multiple copies of the database for deployment on different servers, so that even if one server fails, other servers can continue to provide services. To this end, Redis provides a replication function, which can automatically synchronize the updated data to other databases when the data in one database is updated.

In the concept of replication, databases are divided into two categories, one is the master database (master), the other is the slave database (slave). The master database can read and write, and when the write operation causes data changes, it will automatically synchronize the data to the slave database. The slave database is generally read-only and accepts data synchronized from the master database. A master database can have multiple slave databases, while a slave database can have only one master database.

Cluster:

A cluster is a group of independent computers interconnected through a high-speed network that form a group and are managed in a single system mode. When a customer interacts with a cluster, the cluster is like an independent server. Cluster configuration is used to improve availability and scalability. When the request arrives, it is first processed by the load balancing server and forwarded to another server.

Difference

The division of master and slave servers is clear, the master server is used to write, the slave server is used to read, one master server, multiple slave servers; a cluster is like multiple master and slave servers, for example, there are multiple master and slave servers in the country. handle the information in their respective regions separately, which can reduce the pressure on the master server in a single master-slave server.

Thank you for reading! After reading the above, do you have a general understanding of the difference between redis master and slave and cluster? I hope the content of the article will be helpful to all of you. If you want to know more about the relevant articles, you are welcome to follow the industry information channel.

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