Elastic Load Balance
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Elastic Load Balance (ELB)

Elastic Load Balance (ELB)

Elastic Load Balance (ELB) automatically distributes incoming traffic across multiple servers to balance their workloads, increasing service capabilities and fault tolerance of your applications.

Elastic Load Balance (ELB) automatically distributes incoming traffic across multiple servers to balance their workloads, increasing service capabilities and fault tolerance of your applications.

Product Advantages

  • Robust Performance

    ELB can establish up to 100 million concurrent connections and meet your requirements for handling huge numbers of concurrent requests.

    ELB can establish up to 100 million concurrent connections and meet your requirements for handling huge numbers of concurrent requests.

  • High Scalability

    ELB makes sure that your applications always have enough capacity for varying levels of workloads. It works with Auto Scaling to flexibly adjust the number of servers and intelligently distribute incoming traffic across servers.

    ELB makes sure that your applications always have enough capacity for varying levels of workloads. It works with Auto Scaling to flexibly adjust the number of servers and intelligently distribute incoming traffic across servers.

  • Easy to Use

    A diverse set of protocols and algorithms enable you to configure traffic routing policies to suit your needs while keeping deployments simple.

    A diverse set of protocols and algorithms enable you to configure traffic routing policies to suit your needs while keeping deployments simple.

Application Scenarios

High Traffic Websites

ELB intelligently distributes traffic to ensure smooth running of applications, making it a good choice for websites with an extremely large number of simultaneous requests.


Advantages

  • Flexible Expansion

    ELB allows you to monitor traffic and automatically scales as traffic changes.

  • High Performance

    ELB is capable of processing hundred millions of connections simultaneously.

Related Services

VPC
ECS
RDS for MySQL
Anti-DDoS

Flash Sales

ELB works with Auto Scaling to balance the number of servers during promotion periods that feature sudden spikes.


Advantages

  • Elastic Scaling

    Servers are automatically added or removed according to changes in the amount of incoming traffic.

  • High Availability

    Server health status is regularly monitored and traffic is distributed only to healthy servers, ensuring service continuity.

  • High Performance

    ELB can process hundred millions of concurrent connections, making it the right choice for handling a large number of access requests.

Related Services

VPC
ECS
AS
OBS

Functions

  • Multiple Protocols

    Multiple protocols are supported at Layer 4 and Layer 7, facilitating diverse application scenarios.

    Multiple protocols are supported at Layer 4 and Layer 7, facilitating diverse application scenarios.

  • High Availability

    A variety of measures ensure high service availability and quality.

    A variety of measures ensure high service availability and quality.

  • Layer 4
    Layer 4

    TCP and UDP are used to handle services with a large number of access requests, or those require high performance.

    TCP and UDP are used to handle services with a large number of access requests, or those require high performance.

  • Layer 7
    Layer 7

    Both HTTP and HTTPS are supported. Multiple encryption protocols and cipher suites are available for HTTPS to ensure service flexibility and security.

    Both HTTP and HTTPS are supported. Multiple encryption protocols and cipher suites are available for HTTPS to ensure service flexibility and security.

  • Health Check
    Health Check

    Server health status is regularly monitored and traffic is distributed only to healthy servers, ensuring service continuity.

    Server health status is regularly monitored and traffic is distributed only to healthy servers, ensuring service continuity.

  • Cross-AZ Load Balancing
    Cross-AZ Load Balancing

    ELB distributes traffic across availability zones and ensures service continuity even if an availability zone fails because of a disaster.

    ELB distributes traffic across availability zones and ensures service continuity even if an availability zone fails because of a disaster.

  • Sticky Sessions

    Requests from a client for a particular session are forwarded to the same backend server to ensure that the client has continuous access.

    Requests from a client for a particular session are forwarded to the same backend server to ensure that the client has continuous access.

  • Elastic Scaling

    ELB automatically scales its request handling capacity and combines with Auto Scaling to improve service flexibility and reliability.

    ELB automatically scales its request handling capacity and combines with Auto Scaling to improve service flexibility and reliability.

  • Layer 4
    Layer 4

    Source IP addresses are used to maintain sessions at Layer 4.

    Source IP addresses are used to maintain sessions at Layer 4.

  • Layer 7
    Layer 7

    Cookies are used to maintain sessions at Layer 7.

    Cookies are used to maintain sessions at Layer 7.

  • Seamless Integration
    Seamless Integration

    Auto Scaling automatically adjusts the number of servers as necessary to cope with varying levels of workload.

    Auto Scaling automatically adjusts the number of servers as necessary to cope with varying levels of workload.

  • Automatic Expansion
    Automatic Expansion

    ELB automatically scales to the incoming traffic to ensure a positive user experience.

    ELB automatically scales to the incoming traffic to ensure a positive user experience.