Good lessons on building high availability services from Disqus, the commenting service:

Interesting to note that MongoDB is not mentioned anywhere in the talk, even if Disqus is powered by MongoDB. It is either because MongoDB scaling and high availability weren’t a concern (nb no pun intended, but I doubt that) or that MongoDB is not a central piece of Disqus architecture.

Original title and link: Disqus: Scaling the World’s Largest Django Application (NoSQL databases © myNoSQL)