A user has hosted an application on EC2 instances. The EC2 instances are configured with ELB and Auto Scaling.
The application server session time out is 2 hours. The user wants to configure connection draining to ensure
that all in-flight requests are supported by ELB even though the instance is being deregistered. What time out
period should the user specify for connection draining?
A.
5 minutes
B.
1 hour
C.
30 minutes
D.
2 hours
Answer should B.
When you enable connection draining, you can specify a maximum time for the load balancer to keep connections alive before reporting the instance as de-registered. The maximum timeout value can be set between 1 and 3,600 seconds (the default is 300 seconds). When the maximum time limit is reached, the load balancer forcibly closes connections to the de-registering instance.
http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/config-conn-drain.html
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Because you want to be as close to the session timeout as possible right?
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B is correct.
Maximum timeout is 3,600 seconds = 1 hour
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b
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