Elastic Load Balancing

  • Basically, the load balancer will distribute the traffic across multiple targets/servers and it can across multiple Availability Zones.

  • It monitors the health of all your targets and only spreads the load to the healthy targets, so it basically does health checks as well.

  • ELB is a managed Load Balancer by AWS, so AWS takes care of most of the stuff; you can also create your own but it's much more effort to maintain and integrate.

  • There are 3 main types of Load Balancers: 1. Application Load Balancer - Functions at the application layer (the 7th of the OSI model), so for HTTP and HTTPS. 2. Network Load Balancer - Functions at the transport layer (the 4th of the OSI model), so for high performance, TCP and UDP connections 3. Classic Load Balancer - It can only be used with EC2 classic instances. It is slowly retiring and won't be asked about in the test.

PreviousScalability and ElasticityNextAuto Scaling

Last updated

Was this helpful?