IIS app pools have a property listed as '"Server Unavailable" Response Type", and having the name "loadBalancerCapabilities" in their IIS schema, which can take either of the values HttpLevel (default) or TcpLevel. This is described as having to do with how a load balancer handles existing connections/clients when one of the servers is taken out of rotation. Which setting is better for an application load balancer at Amazon Web Services (AWS)?

  • You can easily carry out your own experiment, by setting one of the value, and then stop an application pool manually. As Microsoft set HttpLevel as default, you should assume that most vendor products support that. – Lex Li Oct 18 '18 at 1:13
  • Yes, but asking around to see if anyone else already knows the answer is also a good way to get information. :-) But--HOW long have you worked with Microsoft products, that you would assume that the way they did something is likely to be the most useful way in an arbitrary circumstance? Maybe the default is the correct setting for a Microsoft (Azure) load balancer. – Green Grasso Holm Oct 18 '18 at 14:02

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