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The editor will share with you the reasons for using redis cluster. I hope you will gain a lot after reading this article. Let's discuss it together.

Why use redis clustering?

In general, in order to improve the response speed of the website, the hot spot data is always saved in memory rather than read directly from the back-end database.

Redis is a good Cache tool. Large website applications, the amount of hot data is often huge, dozens of gigabytes or hundreds of gigabytes is a very normal thing.

Due to memory limitations, using one Redis instance is obviously unable to meet the demand, so you need to use multiple Redis (clusters) as cache databases. In order to respond quickly when the user requests.

What is a Redis cluster?

Redis cluster is a distributed (distributed), fault-tolerant (fault-tolerant) Redis implementation, and the functions that can be used by clusters are a subset of the functions that can be used by ordinary stand-alone Redis (subset).

There are no central nodes or proxy nodes in the Redis cluster, and one of the main design goals of the cluster is to achieve linear scalability (linear scalability).

Redis clusters provide a way to run Redis, where data is automatically partitioned among multiple Redis nodes. The Redis cluster also provides a degree of availability during partitioning, that is, it can actually continue to run when some nodes fail or are unable to communicate. However, in the event of a major failure (for example, when most primary stations are unavailable), the cluster stops running.

Redis cluster model

1): all nodes are directly connected through the service channel, and the transmission speed and bandwidth are optimized by binary protocol.

2): client and node communicate through ascii protocol

3): the client is directly connected to the node and does not need an intermediate Proxy layer. The client does not need to connect to all the nodes in the cluster, but to any of the available nodes in the cluster.

After reading this article, I believe you have a certain understanding of the reasons for using redis cluster, want to know more about it, welcome to follow the industry information channel, thank you for reading!

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