Heya,
Just pushed support for better compression of stored fields (_source for
example). The compression does not work on doc level (like setting compress
to true in the _source mapping), but instead works on the actual stored
fields storage. I got pretty nice results with this compression turned on.
This feature will be part of upcoming 0.19.5. More info here:
https://github.com/elasticsearch/elasticsearch/issues/2037.
-shay.banon