In parent.config, we have a series of key names that are either confusing, or have been expanded well beyond what the name implies:
- round_robin. This now describes a selection strategy.
- parent. Origins can be described here too. Not sure what a good descriptor would be.
- parent_is_proxy describes how the request will be made from the child node – eg, 'true,' means the request will be a proxy style request (GET http://example.com/foo); 'false' means a traditional style request (GET /foo\n Host: example.com)
In addition, there are several options that only apply when other settings are used. For instance, secondary_parent only applies to the consistent_hash strategy. Similarly, today, "qstring" only applies to consistent_hash, as the URI is not considered for any other existing selection strategy.