How to Compare Brokers

• Will any reader need a message again after it has been handled, and how far back?
• What must stay in order, and for which key?
• How many independent readers are there now, and how many will there be later?
• When one message fails, what should happen to it, and must the others wait?
• Must the broker decide which reader receives which message?
• What are the peak rate, the message size, and the longest backlog the system must absorb?
• Who will run the broker, and for how many teams and regions?

These seven questions decide most broker choices