Node is an event-based server-side JavaScript engine.
 .
 Dirty.js is a tiny & fast key value store with append-only disk log.
 It is ideal for apps with less than 1 million records.
 Its characteristics are:
  - the file format is newline separated JSON;
  - the database lives in the same process as the application, they
    share memory;
  - there is no query language, you just forEach through all records.