Cross-Zone Load Balancing
Explore the concepts of cross-zone load balancing in AWS Elastic Load Balancers. Understand how enabling this feature distributes traffic evenly across multiple Availability Zones, enhancing application availability, fault tolerance, and scalability. This lesson covers differences in load balancers and the benefits of enabling cross-zone load balancing for resilient architecture design.
We'll cover the following...
Cross-zone balancing
In Elastic Load Balancers, incoming traffic is distributed evenly across load balancer nodes in each AZ, which then forwards these requests to the targets registered within that AZ. However, Elastic Load Balancers allow us to enable cross-zone load balancing, where all load balancer nodes can distribute traffic to all available healthy targets, irrespective of their Availability Zone.
Let's look at the diagram given below to have a better understanding of how cross-zone load balancing works.
In the first ...