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Guide to Redis Technology: What is it and Why Should I Care?

HapPhi has deployed Redis in our architecture. Redis is a key-value store and in-memory data structure server. It was developed by Salvatore Sanfilippo, the same developer who created Memcached. Redis is a high-performance, open source, in-memory data structure server that is often used as a distributed key/value storage engine. It is often used as a replacement to traditional data stores because of its speed, scalability, and low latency.

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June 15, 2022

 Guide to Redis Technology: What is it and Why Should I Care

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Redis is a popular in-memory data store that is used by many companies to power their applications. It has a rich set of features and can be used for so much more than just a cache—in fact, some might call it an database for disk. So why all the fuss about Redis? This informative guide will help you understand everything you need to know about Redis. You’ll learn what it is, how it works, and why it’s so helpful from a technical standpoint. Keep reading to discover more!

What Is Redis?

Redis is an open source data store that specializes in storing data in memory. Many companies use Redis to power their applications because it’s a fast and efficient way of storing data. You’ll often see it referred to as a “data structure” or “key value” store. The term “data structure” refers to the way data is organized and accessed. In Redis, data is organized as “keys,” and the data associated with that key is known as the “value”.

How Does Redis Work?

Redis is an in-memory data store, which means that the data is stored in RAM. This allows for fast access times and results in high scalability because there is no disk access involved. When you want to retrieve data from Redis, the client first sends a “read” request to the data store. This request includes a key that specifies what data you want to read. When Redis receives the request, it looks at the key and retrieves the relevant data from memory and sends it back to the client. Next, when you want to write data to Redis, the client sends a “write” request. This request contains the data you want to write, along with the key to which the data should be written. When Redis receives the request, it writes the data to memory.

Why Use Redis?

The main advantage of using Redis over other data stores like PostgreSQL or MySQL is speed. Since it’s an in-memory data store, reading and writing data is very fast. This means that you can achieve scalability, responsiveness, and high performance for your applications. If the data needs to be retrieved later, you can store it in Redis and it will be available almost instantly. Another reason why you might want to use Redis is if you are experiencing high load on your database. This can happen if you have a lot of traffic coming to your application and need to store a lot of data. If you are using a more traditional data store, you may not be able to manage the amount of data you need to store. With Redis, you can store more data and scale the amount up and down as needed.

Which Is the Best Redis Client?

Depending on what programming language you use, you’ll have different Redis clients available to you. For example, if you’re using Python or Ruby, you’ll have a library that you can use to communicate with Redis. You can also use Redis through an HTTP interface, or via a command line client.

Limitations of Redis

Redis has many advantages and is a very powerful data store, but it has a few limitations as well. One is that you can only store strings in Redis. This means that if you want to store numbers or other data types, you can’t use Redis. Another limitation is that you can’t scale Redis across multiple nodes. This means that if your data becomes too large for a single node, you don’t have any option but to scale down. This can be a problem if you need more capabilities from Redis as your data grows.

Wrapping up

Redis is a very powerful data store that is used by many companies to power their applications. It has a rich set of features and can be used for so much more than just a cache. You can use Redis to store data that you need to access quickly and easily, like session data. It’s also useful if your data is too large to be stored in a traditional data store like PostgreSQL.

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