Executing an aggregation
Elasticsearch provides several functionalities other than Search; this allows you to execute statistics and real-time analytics on searches using the aggregations.
Getting ready
You need an up-and-running Elasticsearch installation, as we described in the Downloading and installing Elasticsearch recipe in Chapter 1, Getting Started.
To execute these commands, any HTTP client can be used, such as cURL (https://curl.haxx.se/), Postman (https://www.getpostman.com/), or similar. Using the Kibana console is recommended, as it provides code completion and better character escaping for Elasticsearch.
To correctly execute the following commands, you will need an index populated with the ch07/populate_aggregation.sh commands available in the online code.
The index that’s used in this recipe is index-agg.
How to do it...
To execute an aggregation, we will perform the following steps:
- Compute the top 10 tags by name using the command...
