Help Center/ Elastic Load Balance/ FAQs/ Listeners/ What Are the Relationships Between Load Balancing Algorithms and Sticky Session Types?
Updated on 2023-03-30 GMT+08:00
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What Are the Relationships Between Load Balancing Algorithms and Sticky Session Types?

Sticky sessions ensure that requests from the same client are routed to the same backend server. Table 1 lists the types of sticky sessions.

Table 1 Sticky sessions supported by load balancers

Load Balancing Algorithm

Sticky Session Type

Layer 4 (TCP/UDP)

Layer 7 (HTTP/HTTPS)

Weighted round robin

Source IP address

Supported

Not supported

Load balancer cookie

N/A

Supported

Application cookie

N/A

Not supported

Weighted least connections

Source IP address

Not supported

Not supported

Load balancer cookie

N/A

Not supported

Application cookie

N/A

Not supported

Source IP hash

Source IP address

N/A

Not supported

Load balancer cookie

N/A

Not supported

Application cookie

N/A

Not supported

Generally, the weighted round robin algorithm is recommended. Sticky sessions at Layer 4 use source IP addresses to main sessions, and sticky sessions at Layer 7 use load balancer cookies.

Parent topic: Listeners