How does elasticsearch work?

Question

How does Elasticsearch handle indices? I have a field called Coordinates which has subfields lat and lng in a collection called users. I want to search inside this collection but by indexing the coordinate field. In my MongoDB configuration the coordinate field is already a 2D index. How can I try to tell ElasticSearch to search indexing that field? Does it know that coordinates is an index ? or should I tell it by this script?

curl -XPUT "localhost:9200/_river/artist/_meta" -d'
{
  "type": "mongodb",
    "mongodb": {
      "db": "mydb", 
      "collection": "users"
    },
    "index": {
      "name": "coordin", 
      "type": "coordinates"
    }
}'

Answer 1

I assume that here by "index" you mean like the ones at MongoDB and SQL server. At elasticsearch context it is a collection of types and documents, more like a database is a collection of tables and rows. By default all fields in elasticsearch are stored into a Lucene data structure from which it can be efficiently be queried.

Elasticsearch does support indexed geospatial data, documentation can be found from here.