What is SLB?

Server Load Balancer (SLB) is a service that distributes incoming traffic across backend server groups to increase the throughput of your applications. SLB can also be used to eliminate single points of failure (SPOFs) and improve the availability of applications.

SLB is a fully managed load balancing service provided. It can be used out-of-the-box and provides elastic, stable, reliable, and high-throughput load balancing services. You can scale SLB resources along with the changes to your business and pay only for what you use. SLB is designed to balance the heavy loads of hyper-scale Internet applications. For example, you can use SLB to handle traffic spikes during large-scale online promotions or improve the availability of Internet of Things (IoT) applications that receive a great number of concurrent connections. Compared with self-managed hardware load balancers, SLB can handle a great number of user requests in scenarios such as large-scale promotional events without the need for large upfront investments. Compared with self-managed, open source software load balancers, SLB is maintained around the clock by an experienced and professional technical team. This ensures service stability and improves O&M efficiency.