Description of Accumulo Sharding

[David Medinets <da...@gmail.com>]

https://github.com/medined/accumulo-sharding - I wrote this description a
bit ago. Okay, it was nearly a year. Then a few people commented on it
(thanks!) and I got distracted. In any case, here it is. It starts like
this:

  A distributed database typically is thought of as
  having data spread across multiple servers.
  But how does the data spread out? That's a
  question I hope to answer - at least for Accumulo.