Gain insights into Redis's capabilities as a database, cache, and message broker. Delve into commands, transactions, and clustering. Explore flexibility, security, and data structure support with Redis.

Redis.tar.gz

Redis is an open-source, in-memory data structure store used as a database, cache, and message broker. Unlike Memcached, it supports multiple data types, giving a lot of flexibility to the user. Redis is easy to configure and provides clustering support to store data in multiple servers.

In this course, you will learn about the various commands that you can use to store different types of data structures in Redis. Some of those commands include utility, insertion, and modification commands.

You will also become familiar with different aspects of Redis, such as transactions, security, partitioning, and clustering. In all, this is your go-to guide to Redis.

Complete Guide to Redis

## What is a message queue?
A message queue is a type of temporary storage for messages. The sender, also known as **publisher**, sends messages to the queue. The messages remain in the queue until a receiver also known as a **subscriber**, is ready to read the messages. The main use case for a message queue is when there are some larger jobs that need to be processed. The sender sends the jobs to a queue instead of directly sending it to the receiver. The receiver picks each job, one by one, and processes it.

Let's say we are booking movie tickets on a website. There are a few things that should be done immediately, like selecting the seats, payment, etc. But a few things, like sending tickets via email, may take time and are not required to be done immediately. These tasks that time and are not required to be done immediately can be added to a queue and can be processed one by one.

## How Redis is used as a message queue?
As we discussed earlier, Redis can also be used as a message queue. The publisher can publish to only one channel, although a channel may have multiple subscribers. A subscriber can subscribe to one or more channels.


# What is a message queue?
A message queue is a type of temporary storage for messages. The sender, also known as **publisher**, sends messages to the queue. The messages remain in the queue until a receiver also known as a **subscriber**, is ready to read the messages. The main use case for a message queue is when there are some larger jobs that need to be processed. The sender sends the jobs to a queue instead of directly sending it to the receiver. The receiver picks each job, one by one, and processes it.

Let's say we are booking movie tickets on a website. There are a few things that should be done immediately, like selecting the seats, payment, etc. But a few things, like sending tickets via email, may take time and are not required to be done immediately. These tasks that time and are not required to be done immediately can be added to a queue and can be processed one by one.

# How Redis is used as a message queue?
As we discussed earlier, Redis can also be used as a message queue. The publisher can publish to only one channel, although a channel may have multiple subscribers. A subscriber can subscribe to one or more channels.


This lesson explains the concepts behind using Redis as a queue.

Let's Begin

Redis Commands

Redis Advanced Concepts

Redis Cluster

Appendix

Redis Publisher/Subscriber Model

What is a message queue?