mmap files and sharding... It seems like the problem is that you're not using MongoDB in a sharded setup to begin with. For good or bad, MongoDB targets the sc

mmap files and sharding... It seems like the problem is that you're not using MongoDB in a sharded setup to begin with. For good or bad, MongoDB targets the scale where you need sharded and replicated setups. In other words, a large enough operation to require multiple servers for data storage. If you need the opposite of that, which is multitenancy, MongoDB is not going to be a good fit. On the other hand, MongoDB has always been sold as a rapid prototyping and easy to iterate datastore, which is attractive for people working on small projects. Then they have an "oh shit" moment when they run into operational issues.