Want to store data (even binary) efficiently in Elasticsearch?

[Attila_Nagy]

If you want to store data in the most efficient and compact way in Elasticsearch, you should exclude those fields which contain them from source:
https://www.elastic.co/guide/en/elasticsearch/reference/5.5/mapping-source-field.html
The problem is currently you can't get your data back with the doc APIs, only with search.

I wonder how many think that using doc values for storing and getting data (in native format, meaning: in the most compact way) is a worthy addition to Elasticsearch.
If you would like to have this, please place a thumbs up on this issue (also, there are some simple examples on how much space can be saved by using it):

Issue: Elasticsearch should support returning doc values in get and update APIs too

and share your thoughts about it.
Hopefully this will help to form an RFC on how should be this done nicely.