Amazon ElastiCache is a fully managed in-memory data store and caching service that makes it easy to deploy, operate, and scale an in-memory cache in the cloud. It provides fast access to your data by storing the most frequently accessed information from your web applications, databases, or serverless functions. This blog post will focus on what Amazon ElastiCache is as well as how you create it to boost performance!
What is Caching?
Caching is the act of keeping information that people use frequently in a location where they can find it more quickly. This might be on a computer or the internet. The most suitable thing to put in this area is something that people use often and need to access quickly, such as the internet.
What is Elasticache?
In the cloud, Elasticache serves as an in-memory data store and cache. Elasticache is a web service. As a result, it’s simple to set up, manage, and scale.
Elasticache is a type of database technology that provides in-memory caching for web applications. This means the most recently queried data is kept in server memory, allowing access to it rapidly no matter how large or complex the dataset is. By keeping frequently accessed items readily available and reducing demands on databases, Elasticache can improve latency and reduce resource consumption.
As of today, Elasticache is available in 6 regions:
US East (Northern Virginia), US West (Oregon), EU (Ireland), Asia Pacific (Tokyo), and two regions in Brazil (Sao Paulo).
The service allocations and instances you create through ElastiCache affect your Amazon EC2 capacity usage because every allocation must be fulfilled with an Amazon EC2 instance from one of your Availability Zones. Each Amazon EC2 instance has some overhead as well as the cost associated with running an application, so it’s important not to make too many unnecessary Elasticache nodes.
The more nodes you have, the faster your queries will run, but only up to a point. You don’t need very large numbers of nodes to get fast performance for most common use cases. We recommend setting the number of cache nodes based on how frequently you access data in Elasticache and whether caching that data can save overall costs by reducing the amount of time you spend running queries against an RDS database or ElastiCache node.
Main advantages of AWS Elasticache
The main advantages of the AWS Elasticache service are:
- By storing critical pieces of data in memory, applications will run faster.
- Using Elasticache, which supports Master/Slave replication and multi-AZ for cross-AZ redundancy, you can achieve redundancy between AZs.
- it is fully managed and scalable.
- Increase latency and throughput for many read-heavy applications, such as social media, games, and media sharing.
Types of AWS Elasticache
The following types can be considered:
1)Redis Cache: Redis is one of the most reliable and widely known open-source caching software that runs on TCP/IP protocol and stores data in memory just like its name suggests. It provides high availability for uptime, scalability of the application, easy management through scripting language(Redis), quick access of multiple databases(NoSQL), etc.
2)Memcache: Memcached has taken over from Redis as it works more effectively than Redis. As it is inbuilt with the operating system, you need not install any other software. Also, it stores data on a disk unlike Redis so data is persistent and not lost when the server crashes. But some of its features like replication, cluster support, etc are restricted to the paid version.
So let’s get started!
- Go to AWS Management Console and in the search bar type “Elasticache”
- ElastiCache dashboard will be shown
- Click on Get Started Now
- Select the Cluster engine as “Redis”
- Give it a name as “MyFirstRedis” and in Description give as “My first Redis instance”
- Come to Node type open it and click on t2 and then select cache.t2.micro because we don’t want any charges
- Give the number of replicas to 0 because we want things free.
- In a subnet group create one and name it as “my-first-subnet-group” and description as “My first subnet group”.
- Scroll down and select any one of the subnets listed below.
- Scroll down and check Enable automatic backups are enabled.
- Keep the Backup retention period as 1 day.
- Click on Create.
- Wait for the status to show as Available.
- Our first Elasticache Redis Cluster or you can say instance is created.
- This is an application-specific concern so to use it you have to install Redis drivers for interacting with your Redis Cache.
In this blog post, we’ve introduced you to the concept of ElastiCache and how it can help your website run faster. We hope that you found these insights valuable, but if not feel free to contact us anytime with any questions or comments. You can also check out our blog for more information on other topics related to web performance optimization as well as our training courses at https://www.thinkcloudly.com/aws-cloud-practitioner/.