Elastic Load Balance (ELB)

Elastic Load Balance (ELB) is a service that automatically distributes incoming traffic across multiple Elastic Cloud Servers (ECSs) to balance their service load. It enables you to increase service capabilities and fault tolerance of your applications.

Cost effective, highly available, starting from CNY 0.0504 /MB/hour Learn more

Product Advantages


Traditional Hardware Load Balancer

High Availability

ELB: Features a redundancy design to automatically remove abnormal nodes and route traffic between normal nodes to ensure service availability.

Traditional Hardware Load Balancer: Service restoration is slow in case of an exception.

High Flexibility

ELB: Automatically expands the processing capability based on the traffic on applications and seamlessly integrates with the Auto Scaling (AS) service to meet the requirements posed by traffic changes.

Traditional Hardware Load Balancer: Changes in traffic demands cannot be handled quickly. If hardware devices have reached their bottleneck, you need to purchase and deploy hardware devices with higher performance. The installation is difficult and the cost is high.

High Performance

ELB: Supports concurrent processing of a maximum of 100,000 requests to meet users' requirements for heavy traffic, and layer-4 (TCP) and layer-7 (HTTP or HTTPS) load balancing as well.

Traditional Hardware Load Balancer: The service capability is limited and cannot meet a burst of concurrent service requests.

Application Scenarios

  • Web Applications

  • Enterprise Portals

  • Internet Startups

Web Applications

Application scenario

Web Applications


  • ELB eliminates single point of failure (SPOF) and improves availability.

Recommended configuration


Enterprise Portals

Application scenario

Enterprise Portals


  • ELB is deployed in cluster mode and features high availability and reliability, ensuring that enterprise portal services are persistently available. ELB also allows enterprises to adjust IT infrastructure in a fast and efficient manner to reduce operating cost.

Recommended configuration


Internet Startups

Application scenario

Internet Startups


  • ELB works with AS and CES to provide a scalable application structure and help enterprises expand services quickly.

Recommended configuration


Function Description

Automatic Expansion

Automatically expands load balancing capabilities based on users' traffic.

Health Check

Checks the status of backend ECSs, removes an unhealthy ECS from the traffic forwarding list, and resumes forwarding traffic to it after it recovers.

Sticky Session

Distributes sessions of a user to a specific backend ECS.

Layer-4 and Layer-7 Load Distribution

Supports load distribution using the layer-4 protocol (TCP) or layer-7 protocol (HTTP or HTTPS).

Auto Scaling

Works with the AS service to ensure service flexibility and availability.

Developer Resources


You can send HTTP/HTTPS requests for calling HUAWEI CLOUD APIs to manage your ECSs. In this way, you can flexibly, accurately, and promptly perform operations on your applications, resources, and data.

Regions and Endpoints

Introduce regions and endpoints provided by HUAWEI CLOUD for services.