doc-exports/docs/elb/umn/elb_pro_0005.html

Product Advantages

Advantages of Dedicated Load Balancers

• Robust performance

  Each dedicated load balancer has exclusive use of isolated resources, meeting your requirements for handling a massive number of requests. A single dedicated load balancer deployed in one AZ can handle up to 20 million concurrent connections.

  If you deploy a dedicated load balancer in multiple AZs, its performance such as the number of new connections and the number of concurrent connections will multiply. For example, if you deploy a dedicated load balancer in two AZs, it can handle up to 40 million concurrent connections.

  

  • If requests are from the Internet, the load balancer in each AZ you select routes the requests based on source IP addresses.
  • For requests from a private network:
    • If clients are in an AZ you select when you create the load balancer, requests are distributed by the load balancer in this AZ. If the load balancer is unavailable, requests are distributed by the load balancer in another AZ you select.
    • If clients are in an AZ that is not selected when you create the load balancer, requests are distributed by the load balancer in each AZ you select based on source IP addresses.
• High availability

  ELB can route traffic uninterruptedly. If your servers in one AZ are unhealthy, it automatically routes traffic to healthy servers in other AZs. ELB provides a comprehensive health check system to ensure that incoming traffic is routed only to healthy backend servers, improving the availability of your applications.

• Ultra-high security

  ELB supports TLS 1.3 and can route HTTPS requests to backend servers. You can select security policies or customize security policies that fit your security requirements.

• Multiple protocols

  ELB supports , TCP, UDP, HTTP, and HTTPS, so that they can route requests to different types of applications.

• No limits

  ELB can route requests to both servers on the cloud and on premises, allowing you to leverage cloud resources to handle burst traffic.

• Ease-of-use

  ELB provides a diverse set of algorithms that allow you to configure different traffic routing policies to meet your requirements while keeping deployments simple.

Advantages of Shared Load Balancers

• High availability

  Shared load balancers can route traffic across AZs, ensuring that your services are uninterrupted. If servers in an AZ are unhealthy, ELB automatically routes traffic to healthy servers in other AZs. Shared load balancers provide a comprehensive health check mechanism to ensure that incoming traffic is routed to only healthy backend servers, improving the availability of your applications.

• Multiple protocols

  ELB supports TCP, UDP, HTTP, and HTTPS protocols to route requests to different types of applications.

• Ease-of-use

  Shared load balancers provide a diverse set of algorithms that allow you to configure different traffic routing policies to meet your requirements while keeping deployments simple.

• High reliability

  Shared load balancers can be deployed across AZs and can distribute traffic more evenly.

Parent topic: Service Overview