The term scalability often gets thrown about when creating online services. Most people just assume it means having the ability to add additional servers on demand, and to an extent that is mostly what it is, but of course if you are in a situation in which you have the need to add more servers all you are doing is moving the bottleneck further up the line.
A while back whilst researching languages for a new set of tools, it became apparent that ease of deployment was a definite benefit. On one hand there was Go which can be compiled to a single native binary, on the other there was Scala a language I personally preferred due to its compatibility with Java libraries and tools, as well as it forcing me to learn functional programming, but that has a lot of dependencies in the form of the JVM.
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