How to view Redis version

The Redis version can be viewed in the following ways: use the redis-cli command-line tool to run the INFO command and view the redis_version field. Use administrative tools such as RedisInsight to view version information. For statically compiled Redis or redis-cli not installed, view the version information of the service configuration file or executable file.

How to view the Redis version? A veteran's nagging

You may be building a Redis cluster, or debugging a tricky bug, in short, you need to know your Redis version. This seems simple, but it has hidden mystery. Don't think that it can be done with just one simple command. This involves the installation method, operation mode of Redis, and even your familiarity with the system. In this article, let’s talk about this seemingly simple “version viewing” issue, and by the way, I’ve talked about the pitfalls I’ve stepped on over the years.

Let’s talk about the most direct one first, and most people think of: redis-cli command line tool. You just need to open the terminal, connect to your Redis instance, and enter the INFO command to see a lot of information, including the version number. It's like opening a treasure chest filled with various status information from Redis.

 <code class="bash">redis-cli INFO</code>

You will see an output like this:

 <code># Server redis_version:6.2.6</code>

But this is just superficial effort. The actual situation is far more complicated than this. For example, if you use Docker to run Redis, then redis-cli connects to the Redis instance in the Docker container, and the version number is naturally the version installed in the container. If you have multiple Redis instances, or even multiple versions of Redis coexist, you have to make sure that the correct instance is connected. It's like looking for a needle in a vast sea of ​​water, and finding the wrong target if you are not careful.

For example, you may be using some management tools, such as RedisInsight or Redis services provided by some cloud platforms. These tools usually display the Redis version directly, saving you the hassle of typing commands. However, this brings up another problem: the version of the tool itself may affect the accuracy of the display results and even lead to the display of incorrect version information. So, don't rely entirely on tools, it's better to verify it with redis-cli .

There are more extreme cases, such as your Redis is compiled statically, or you don't have redis-cli installed at all. At this time, you may need to view the configuration file of the Redis service, or directly check the version information of the Redis executable file. It's like doing an archaeological excavation, which requires a little patience and skill. You may need to use the file command or other system tools to view the details of the executable file.

Finally, I want to emphasize that the version number is just surface information, and more importantly, it is to understand the functional features and potential problems of the Redis version you are using. There may be compatibility issues between different versions, and there may be some known bugs. Therefore, when choosing a Redis version, you should weigh the trade-offs based on actual needs, and pay attention to official security announcements and update information in a timely manner. It's like choosing a handy weapon, not only sharp but also reliable. Don't affect your business because of version issues, it will be more than worth the loss.

In short, it seems simple to view the Redis version, but in fact there are many situations to consider. Remember, try more and think more to become a true Redis master.

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