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What are the five uses of Redis in the real world? in response to this question, this article introduces the corresponding analysis and solutions in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

Redis is a powerful in-memory data structure storage, including database, cache, message broker and other uses. Most people often think of it as a simple store of key values, but it actually has more capabilities. Below I will summarize some real examples of what Redis can do.

1. Full page cache

The first is full-page caching. If you are using server-side rendered content, you do not need to re-render each page for each individual request. With caches such as Redis, you can cache frequently requested content, greatly reducing latency for the most requested pages, and most frameworks have hooks for Redis cached pages.

Simple command

/ / Set the page that will last 1 minute SET key "..." EX 60 / / Get the page GET key

2. Ranking list

One of the highlights of Redis is the rankings. Because Redis is in memory, increments and decrements can be handled very quickly and efficiently. Compare this to running a SQL query for each request, and the performance gains are huge! This combined with Redis's sorted set means that you can fetch items in the list with scores of * in milliseconds, and it's very easy to implement.

Simple command

/ / Add an item to the sorted set ZADD sortedSet 1 "one" / / Get all items from the sorted set ZRANGE sortedSet 0-1 / / Get all items from the sorted set with their score ZRANGE sortedSet 0-1 WITHSCORES

3. Session Session storage

The most common use of Redis that I have seen is session storage. Unlike other session stores, such as Memcache, Redis can retain data so that all data still exists when the cache is stopped and restarted. Even if it doesn't require strict and continuous tasks, this feature can still save your users a lot of trouble. No one would like to see their conversations randomly deleted for no reason.

Simple command

/ / Set session that will last 1 minute SET randomHash "{userId}" EX 60 / / Get userId GET randomHash

4. Queue

One of the less common but useful things you can do with Redis is queuing. Whether it's email queues or data used by other applications, you can create an efficient queue in Redis. This feature can be easily and naturally used by any developer who is familiar with stacks and push and pop projects.

Simple command

/ / Add a Message HSET messages ZADD due / / Recieving Message ZRANGEBYSCORE due-inf LIMIT 0 1 HGET messages / / Delete Message ZREM due HDEL messages

5 、 pub/sub

The final use of Redis in the real world is the pub / sub that I will propose in this article. This is one of the built-in features of Redis; the result may be * *. You can create a real-time chat system, trigger notifications for friend requests on social networks, and so on. This feature is one of the most underrated features provided by Redis, but it is very powerful and easy to use.

Simple command

/ / Add a message to a channel PUBLISH channel message / / Recieve messages from a channel SUBSCRIBE channel's answers to the questions about the five uses of Redis in the real world are shared here. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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