Why not Prospero?

Prospero, the predecessor to Miranda, was a system written by Chris Chew (with a little help from me) in Erlang to capture HTTP POSTs and play them back to interested parties.

The question is this: why not just use Prospero?  Why go to the trouble of writing a new system?  I will answer this question in a series of posts.  This is partially because the answer is that complex, but also so that I have something to talk about for the next few days.

In broad strokes, here is the answer:

• Prospero is written in Erlang
• It is hard to find people who have experience with Erlang
• It is hard to train people to use Erlang
• Prospero cannot cross availability zones
• Mnesia limitation
• Prospero depends on many other systems
• Erlang
• RabbitMQ
• Mnesia
• Why not modify Prospero?
• Misc reasons
• Prospero only deals in POSTs
• Prospero only runs over HTTP, not HTTPS