Speeding up GET

The standard GET operation is very fast, but if you need to fetch a lot of IDs, ElasticSearch provides the multi get operation.

Getting ready

You need a working ElasticSearch cluster and the document index explained in the Indexing a document recipe.

How to do it...

The following are the multi GET REST URLs:

• http://<server</_mget

• http://<server>/<index_name>/_mget

• http://<server>/<index_name>/<type_name>/_mget

For executing a multi GET action, we need to perform the following steps:

1. It is the GET method, but it requires a body with IDs and the index/type if they are missing.

   The following is an example which uses the first URL, but we need to provide the index, type, and id parameters:

   curl 'localhost:9200/_mget' -d '{
       "docs" : [
           {
               "_index" : "myindex",
               "_type" : "order",
               "_id" : "2qLrAfPVQvCRMe7Ku8r0Tw"
           },
           {
               "_index" : "myindex",
               "_type" : "order",
       ...