AWS Target Group Configuration Options

Deregistration Delay

• Definition: Time in seconds the load balancer waits before deregistering a target.
• Exam Importance: High

Slow Start

• Definition: Gradually increases the load to a new target instead of sending full traffic immediately.
• Duration: Expressed in seconds.
• Behavior: Starts at zero and linearly increases the number of requests to the target until the slow start period ends.

Routing Algorithms

• Round Robin: Distributes requests sequentially among all targets regardless of the current load.
• Least Outstanding Requests (LOR): Directs new requests to the target with the fewest in-progress requests.
• Flow Hash (Specific to NLB): Selects a target based on a hash of the connection properties, ensuring the same target is used for the duration of the connection.

Stickiness Settings

• Enabled/Disabled: Determines if stickiness is active.
• Type: Application-based or duration-based.
• Cookie Name: The name of the cookie used for stickiness.
• Duration: The time in seconds the stickiness (cookie) lasts.

Additional Notes

• Slow Start Termination: Ends when the duration elapses or the target becomes unhealthy.
• Disabling Slow Start: Set the slow start duration value to zero.