Difference between type and _type fields

Elastic Stack Elasticsearch
1

Hi,
I can see 2 fields type and _type.
type, I created from LSF configuration and _type is something I can see fomr kibana json object.
Even if their value is same, what is difference between the two?

br,
Sunil

2

_type is something that ES uses for mappings.

3

Hi,
OK.
But why does it creates _type when I have instructed in LSF/LS configuration to create type field already?
Why cant it use type for mapping?
Any diagram to illustrate construct of document, index, type will be helpful.

br,
Sunil

4

ES always creates this, it is a metadata field it requires.
If you only want one then you should set the _type field and then remove the other type field.

https://www.elastic.co/guide/en/elasticsearch/reference/2.3/mapping-type-field.html

5

Thank you very much :slight_smile: