Hi Dan, It really depends on your situation. Please shoot me an email and we can discuss in more detail: matt@nanobeep.com All of the tools will scale to at l

Hi Dan, It really depends on your situation. Please shoot me an email and we can discuss in more detail: matt@nanobeep.com All of the tools will scale to at least several thousand servers, but they each have slightly different ways of doing it. I'd recommend choosing the tool that makes the most sense for you at your current scale since they all can probably scale to what you need. I mention that the book is for folks with less than 100 servers because I don't go into how to set up these tools for higher scale in the book. So, to get the info on how to scale up to very large pools of servers it'd probably be best to first pick a tool and then look at its specific documentation for scaling up.