This is the second part of a three part series on making node.js web apps that are (what I would consider to be) production quality. The first part really just covered the basics, so if you're missing some aspect covered in the basics, you're likely going to have some issues with the approaches discussed here.

I've been working on production-quality Node.js web applications for a couple of years now, and I thought it'd be worth writing down some of the more interesting tricks that I've learned along the way.

I'm mostly going to talk about maintaining a low-defect rate and high availability, rather than get into the details about scaling that are covered in a lot of other places. In particular, I’ll be talking about load-balancing, process management, logging, and metrics, and the hows and whys of each.