I am a bit new to elastic search and would like your views on below points.
If I have a JSON object with 100 fields and i want elastic search
to index only 30 fields and ignore remaining 70 fields but still store the
original json source as _source Is this possible within elastic search ? and
If all the request which is made to the elastic search data node is
persisted on a file system then do I need to have a gateway ?
Thanks in advance for your help.