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07 ElasticSearch Aggregations

An aggregation summarizes your data as metrics, statistics, or other analytics. Aggregations help you answer questions like: What’s the average load time for my website? Who are my most valuable customers based on transaction volume? What would be considered a large file on my network? How many products are in each product category? Elasticsearch organizes aggregations into three categories: Metric aggregations that calculate metrics, such as a sum or average, from field values. Bucket aggregations that group documents into buckets, also called bins, based on field values, ranges, or other criteria. Pipeline aggregations that take input from other aggregations instead of documents or fields.