Speeding up GET operations (multi GET)

The standard GET operation is very fast, but if you need to fetch a lot of documents by ID, Elasticsearch provides the multi GET operation.

Getting ready

You need an up-and-running Elasticsearch installation, as used in the Downloading and installing Elasticsearch recipe in Chapter 2, Downloading and Setup.

To execute curl via the command line, you need to install curl for your operative system.

To correctly execute the following commands, use the indexed document in the Indexing a document recipe.

How to do it...

The multi GET REST URLs are:

http://<server</_mget

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

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

To execute a multi GET action, we will perform the following steps:

1. The method is POST with a body that contains a list of document IDs and the index/type if they are missing. As an example, using the first URL, we need to provide the index, type, and ID:

           curl -XPOST 'localhost...