Replication: when everything is working, it seems the easiest thing, but the challenge comes when we have failures. This is something that MongoDB, being a database that is out for some years, shows us very well.
Let’s face it: the technologies that constitute the underpinning of what we do online are boring – but they allow our world to function, and perhaps that's more important than the latest app to allow filters to be used with little square pictures.
The upcoming version of Android tooling will allow users to create templates. This opens doors to whole new kind of Android open source projects providing application and activity templates to help developers get started with projects much faster.
The interesting part about the active-active is how conflicts are resolved. Rather than just showing that there's a conflict, all CouchDB servers have a consistent view of the world, even after conflicts. How does it do it?