How does the AWS load balancer work?

Have you ever imagined everything that could happen if your application went down? Lost sales, dissatisfied customers… A real nightmare. AWS Load Balancer prevents all of that, making traffic management a dream for any entrepreneur. Understand how it works in today's article!

It's difficult to accurately predict the number of servers your company will need. A highly successful marketing campaign, unexpected industry news, or traffic spikes can overload your server, causing your applications to become inactive. In these situations, an AWS load balancer is the best solution: it can prevent many problems.

But what is the AWS load balancer

The load balancer is capable of distributing the load evenly, achieving a fast and satisfactory response for your users. Has your website traffic suddenly increased? Has one of your servers gone down? The load balancer redirects traffic to the remaining online servers. Furthermore, when a new server is added to the group, the AWS load balancer automatically starts sending requests to it.

Why is the AWS load balancer

In the article “  Load balancer: see how to develop cloud applications ”, we explained in detail the benefits of the AWS load balancer for your business. Among them:

• Distribute user requests or network load efficiently across multiple servers;
• To ensure high availability and reliability by sending requests only to online servers;
• To offer the flexibility to add or remove servers as needed.

How does the AWS load balancer

The AWS load balancer is based on an elastic load balancing service, also known as Elastic Load Balancing (ELB) . Thanks to request routing algorithms, the AWS load balancer is able to automatically distribute your application traffic across multiple destinations, including instances, containers, and Amazon EC2 IP addresses – as well as scale them horizontally as needed, whether in one or more availability zones.

In addition to scaling resources to meet real-time demands, the AWS load balancer uses system health checks to learn the status of servers and increases the fault tolerance of your applications.

Types of AWS load balancers

There are three types of AWS load balancers : Network Load Balancer Load Balancer (CLB), and Application Load Balancer (ALB). Let's understand a little more about them:

Network Load Balancer

It is the best option for load balancing TCP traffic that demands high performance. This type of AWS load balancer operates at the connection level, routing traffic to destinations within the Amazon Virtual Private Cloud (Amazon VPC). Ideal for applications that handle millions of requests per second, the network load balancer

Classic Load Balancer (CLB)

It's a good choice if your routing and load balancing needs can be handled based on IP addresses and TCP ports. Designed for applications built within the EC2-Classic network, this AWS load balancer operates at the request and connection levels.

Application Load Balancer (ALB)

Capable of meeting the most complex load balancing needs, managing traffic at the application and individual request level. This type of AWS load balancer is especially advantageous for modern infrastructures, such as those based on containers.

It's also quite useful if you're building complex web applications where requests for certain components need to be routed to one cluster, while others are routed to a different one.

But... How do you know which AWS load balancer best for you?

load balancer that fits in your pocket.

Whether it's a Classic Load Balancer (CLB), an Application Load Balancer (ALB), or a Network Load Balancer , the best AWS load balancer is the one that fits your budget without sacrificing performance. With that in mind, we created Sky.Saver , an optimization of Amazon Web Services (AWS) infrastructure.

Tested on millions of instances in large enterprises, Sky.Saver uses artificial intelligence to offer all the advantages of EC2 machines at the price of SPOT machines at reduced costs. With Sky.Saver you only pay a percentage of the value you save — in local currency, Brazilian Reais.

Start saving now ! Talk to one of our experts.

Written by Skyone