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Riak Precommit Hooks for Creating Secondary Indeces

I wanted to create a secondary index on a field so that when I want to look up the data, it doesn’t require a full M/R to do.  The great Riak Handbook showed a couple of examples of creating a secondary index, and it looked simple enough.  It actually is pretty simple, but the documentation and examples are few and far between, so I’m going to share my experience. […] Whenever an item is created in this bucket, I want a secondary index based on the app.  I never update items in this bucket, only create.  In fact, I never delete these items either, but figured my code should handle that case.

Erlang code included.

Original title and link: Riak Precommit Hooks for Creating Secondary Indeces (NoSQL database©myNoSQL)

via: http://startup-tech.tumblr.com/post/15300179505/riak-precommit-hooks