Application Load Balancing
Differences Between Application and Network Load Balancing
You can select either application load balancing (HTTP/HTTPS) or network load balancing (TCP/UDP/TLS), or both, for your dedicated load balancers, that best suit your services based on the monitoring metrics, traffic peaks, and regular trends.
- Application load balancing (HTTP/HTTPS): QPS is a dimension that determines the throughput of an application system. Estimate the QPS that needs to be handled by a load balancer and select the specifications accordingly.
- Network load balancing (TCP/UDP/TLS): Estimate the maximum concurrent connections that need to be handled by a load balancer and select the specifications accordingly.
Item |
Application Load Balancing (HTTP/HTTPS) |
Network Load Balancing (TCP/UDP/TLS) |
---|---|---|
Supported protocols |
HTTP, HTTPS, and QUIC |
TCP, UDP, and TLS |
Capabilities |
Handles Layer 7 requests and supports advanced forwarding policies. |
Handles Layer 4 requests and does not support advanced forwarding policies. |
Application scenarios |
Workloads that require high performance at Layer 7, such as real-time audio and video, interactive livestreaming, and game services |
Heavy-traffic and high-concurrency workloads at Layer 4, such as file transfer, instant messaging, and online video services |
Forwarding capabilities |
Routes requests based on HTTP request method, HTTP header, query string, and CIDR block, forwards requests to another URL, and rewrites request URL to forward requests to the specified backend server group. |
Listens to requests from all ports in a given port range and routes them to the corresponding ports on the backend servers. |
Security control |
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Available specifications are displayed on the console and may vary by region.
Application Load Balancing
Table 1 lists the maximum elastic specifications for an application load balancer in an AZ.
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