Elastic Load Balance (ELB)

Elastic Load Balance (ELB) automatically distributes access traffic to multiple ECSs to balance the service load. It enables you to achieve higher levels of fault tolerance in your applications and expand service capabilities of applications.

Robust Performance

ELB can process up to 100 million concurrent connections.

High Availability

ELB is deployed in cluster mode. It also supports cross-AZ active-active disaster recovery.

High Scalability

ELB automatically distributes incoming traffic to applications. It can work with AS to flexibly expand the service capabilities of applications.

Easy to Use

ELB can be quickly deployed and allows you to efficiently manage and adjust distribution policies.

Application Scenarios

  • Large Portals

  • Intra-city Disaster Recovery

  • Flash Sales

Large Portals

Large Portals

ELB evenly distributes traffic to ensure quick and smooth running of services. This makes ELB perfect for large portals that experience massive access.

Advantages

  • Flexible Expansion

    ELB automatically expands the load balancing capabilities as the access load changes.

  • High Performance

    ELB can process 100 million concurrent connections, making it ideal for massive access scenarios.

Recommended for Use With

VPC

ECS

OBS

Anti-DDoS

Intra-city Disaster Recovery

Intra-city Disaster Recovery

ELB distributes traffic across AZs and establishes a real-time disaster recovery system. Enterprises can use ELB to ensure high service availability.

Advantages

  • Flexible Expansion

    ELB automatically expands the load balancing capabilities as the access load changes.

  • Intra-city Disaster Recovery

    ELB supports cross-AZ active-active disaster recovery, allowing you to freely switch over services.

Recommended for Use With

VPC

ECS

OBS

Flash Sales

Flash Sales

By working with AS, ELB automatically distributes traffic to newly-added ECSs to effectively ease system loads during promotion periods.

Advantages

  • Elastic Scaling

    ELB automatically adds or removes ECSs as the service traffic changes.

  • High Availability

    ELB automatically stops distributing traffic to unhealthy ECSs to ensure that services are not interrupted.

  • High Performance

    ELB can process 100 million concurrent connections and is ideal for massive access scenarios.

Recommended for Use With

VPC

ESC

AS

OBS

Function Description

Multiple Protocols

ELB supports multiple protocols at both layers 4 and 7, so it can be used in diverse scenarios.

  • Layer 4 load balancing

    TCP can be used to handle services that require high performance and large-scale concurrent requests.

  • Layer 7 load balancing

    Both HTTP and HTTPS are supported to ensure the service flexibility, security, and reliability.

High Availability

EELB provides a variety of high availability policies to guarantee the service quality.

  • Health Check

    ELB regularly checks ECS status and distributes traffic to only healthy ECSs to maintain service availability.

  • Intra-city Active-Active Disaster Recovery

    ELB supports cross-AZ active-active disaster recovery. If an AZ becomes faulty, ELB can work properly in other AZs.

Sticky Session

Requests from the same user are forwarded to the same ECS within a certain period to ensure continuous access.

  • Layer 4

    Layer 4 load balancing maintains sessions using source IP addresses.

  • Layer 7

    Layer 7 load balancing maintains sessions using cookies.

Elastic Scaling

ELB expands load balancing capabilities and works with AS to scale ECSs to improve service flexibility and reliability.

  • Seamless Interconnection

    ELB can work with AS to adjust the number of ECSs as the service load changes.

  • Automatic Expansion

    ELB automatically expands load balancing capabilities based on the actual traffic to ensure ultimate user experience.

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