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Elasticache In AWS

In this article, we will discuss Elasticache in AWS.

Purpose

The elasticache is used to store the frequently used data in order to improve the application performance.

Elasticache Engines

Elasticache supports 2 types of engines: -

Redis
Memcache

Steps Of Creating An Elastic Cache

In this article, we will create an elasticache with the Redis engine. For that, we will work on the following steps: -

Enable port 6379 in the security group
Launch an EC2 instance
Create an elasticache
Install Redis agent on the EC2 instance
Test the elasticache

Let us work on each step.

Enable Port 6379 In The Security Group

First, enable port 6379 in the security group. This is the same security group that we will use for creating an EC2 instance and elasticache.

Picture showing adding a rule for port number 6379 in the security group

If you are using the Memcache engine, then enable port number 11211.

Launch An EC2 Instance

Use this link to launch an EC2 instance.

Create An Elasticache

To create an elasticache, search the word elasticache in the search box. Click on the ElasticCache in the search result.

Picture showing the ElasticCache in the search result

Following screen will appear.

Picture showing the elasticcache home screen in AWS console

Click on the Get Started Now button. Following screen will appear.

Picture showing selecting the Cluster engine as Redis

Select the Cluster engine as Redis and location as Amazon Cloud. Scroll down to enter the Name and Node type.

Picture showing entering the redis settings

Scroll down to select the subnet.

Finally, scroll down to the bottom and click on the Create button.

Picture showing the Create button for creating the ElasticCache

The elasticache is created.

Picture showing the ElasticCache list page

Install Redis Agent On The EC2 Instance

To install the Redis agent, use the following link. Once the Redis agent is installed, open the command prompt.

Go to the location of Redis agent and write the following code: -

redis-cli -c -h myfirstesnode.lqatbt.ng.0001.use2.cache.amazonaws.com -p 6379

Here, myfirstesnode.lqatbt.ng.0001.use2.cache.amazonaws.com is the primary endpoint of the elasticache.

Picture showing the primary endpoint of the elasticcache

Test The Elasticache

Elasticache is the key value pair. You can use the following command to get and set the key.

set <keyname><value>
get <keyname>

Picture showing the output of elasticcache in AWS

Difference Between Different Cluster Engine

Feature	Memcache	Redis (Cluster Mode Disabled)	Redis (Cluster Mode Enabled)
Data persistence	No	Yes	Yes
Data types	Simple	Complex	Complex
Data partitioning	Yes	No	Yes
Encryption	No	Yes	Yes
High Availability (Replication)	No	Yes	Yes
Multi-Az	Yes	Yes, with auto failover	Yes, with auto failover
Multithreaded	Yes	No	No
Backup and restore	No	Yes	Yes

Posted By -	Karan Gupta

Posted On -	Tuesday, November 9, 2021

Updated On -	Monday, August 22, 2022

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