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.