Initially, we played with some ideas to test if we can fit them together. This was mostly focussing on orchestration of servers and their provisioning. We tried out a mix of RabbitMQ, Nanite and Chef (early adopters, yay!)
Back then, NoSQL databases just started appearing, and we thought, screw MySQL, we’re going to use something new and shiny. We started out using Amazon’s SimpleDB, but were soon hindered by its limitations.
We built Scalarium on Rails, so it was only natural that we started writing our own ActiveRecord-like persistence layer. First, we wrote it to work with SimpleDB, and it was aptly called SimplyStored.
Later, after some first exposure to CouchDB, we decided to use it instead. It was gaining some traction, and we had good access to local community support.
We spent a lot of time on SimplyStored, and for no good reason other than the technical fascination with the idea of not using MySQL, a proven and fast database, which would’ve been very sufficient for our purposes.
In the end, we still managed to build a good product, but shipping it was extended unnecessary amounts of time by trying to start building our own stack rather than use what’s there and what’s proven.
It’s tempting to use new technologies when you’re building something new. After all, you’ve got a clean slate and can just play around.
But when you build a new product as a new company, getting something up and running, something to throw at users, is even more important.
It’s okay to build up some technical debt along the way. Yes, you will spend time later cleaning it up, but at least you can do that knowing that what you’ve built initially was successful enough.
With a proven product that’s bringing in revenue, you have more freedom to gradually remove the technical debt built up in the beginning. Of course you’ll be adding new debt along the way, but that’s just the circle of software engineering life, isn’t it?
At Travis CI, we also made some mistakes of where we focused our attention while building a product. Some things were more focused on building something that’s technically sound rather than make sure we get a working product in front of customers quickly.
Early on, Travis CI started out as a test balloon if you will, with a few simple components to prove its technical viability as a continuous integration system. Leaving some challenges aside, we were able to scale it out quite nicely. We’re still working on removing the technical debt that we built up, but given that our customer base allows us to do so, that’s just fine.
With Scalarium, it took us almost a year to get something in front of customers, an insanely long time. Looking back, the thing I would’ve done differently is not building our own persistence layer, which has no relation at all to what we were trying to build. It just took away precious time from building our first version that could be used by customers.
When building something new, be careful to not fall into the trap of shiny new technologies. They can be blessing and a burden, but the latter is all the more likely when you step into the unknown.
Using proven technology can be incredibly boring, but they give you the room to make sure that what you’re trying to build and sell is sound as a product, rather than a technical masterpiece.
When building something new, simple and proven technology wins. You can always add more bells and whistles later.