Shulou(Shulou.com)06/01 Report--

This article mainly introduces what are the main functions of redis Sentinel mode, which can be used for reference by friends who need it. I hope you will learn a lot after reading this article. Next, let the editor take you to learn about it.

Sentinel mode is a special mode. First of all, Redis provides the command of Sentinel. Sentinel is a separate process, which runs independently as a process. The principle is that the sentry monitors multiple Redis instances running by sending commands and waiting for the Redis server to respond.

Sentinel (Sentinel) is a high availability solution for Redis: a Sentinel system consisting of one or more Sentinel instances can monitor any number of master servers and all slave servers under these master servers, and automatically upgrade one of the slave servers under the offline master server to a new master server when the monitored master server goes offline.

Main function

1. Monitor from time to time whether redis is running well as expected.

2. If a redis node is found to be in trouble, you can notify another process (such as its client).

3. It can switch automatically. When a master node is unavailable, one of the multiple slave of the master (if there is more than one slave) can be elected as the new master, and the other slave nodes will change the address of the master it follows to the new address of the slave promoted to the master.

4. The Sentinel provides the service for the client. The client links the Sentinel, and the Sentinel provides the address of the current master and then provides the service. If there is a switch, that is, the master is down, the Sentinel will provide a new address for the client.

Thank you for reading this article carefully. I hope the editor will share what the main functions of redis Sentinel mode are helpful to you. At the same time, I also hope that you will support us, pay attention to the industry information channel, and find out if you have any problems. Detailed solutions are waiting for you to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.