> The main consideration is one of consistency... unless there is some agreed > upon "standard" then comparisons are worthless and the resulting load > balancing will be inaccurate. For example, say that Apache is front-ending 10 > servers, 5 are Apache and other 5 are Foo, but Foo consistently falsifies > it's capability simply to ensure that it gets all the traffic. Sure, you can > adjust settings on the front end to offset that, but that defeats the whole > purpose of some *accurate*, objective measure of capability.
Wouldn't the servers you load balance between for the same URL generally be more similar than that?
