elasticsearch - querying multiple indexes is possible?

Question

I have an elasticsearch cluster with 3 indexes:

/users/user
/events/visit
/events/register
/pages/page

So, now I need to run queries proces

Answer 1

This is quite easy within Elasticsearch itself! Anytime you would specify an index, you can separate additional indices by comma.

curl -XGET 'http://localhost:9200/index1,index2/_search?q=yourQueryHere'

You can also search all indices with _all.

curl -XGET 'http://localhost:9200/_all/_search?q=yourQueryHere'

Here's some helpful documentation from elasticsearch's website. This site has TONS of info, but it is a bit difficult to find sometimes, IMO.

https://www.elastic.co/guide/en/elasticsearch/reference/current/search-search.html https://www.elastic.co/guide/en/elasticsearch/reference/current/multi-index.html

Answer 2

It is possible to do search query through multiple indices:

for example:

curl -X POST \
'http://localhost:9200/test1,test2/_search?pretty=' \
-H 'Content-Type: application/json' -d '{
    "query": {
    ...
    }
}
'

Answer 3

By not limiting our search to a particular index or type, we have searched across all documents in the cluster. Elasticsearch forwarded the search request in parallel to a primary or replica of every shard in the cluster.

       1)/users,events,pages/_search : Search all types in the users,events and pages

       2)/u*,e*,p*/_search : Search all types in any indices beginning with u,e or beginning with p

       3)/events/visit,register/_search : Search types visit and register in the events index

       4) /_all/user,visit,register,page/_search : Search types users,events and pages in specified indices