This document discusses how Sarine, a company that provides technology for the diamond industry, uses Elasticsearch. It notes that Sarine uses Elasticsearch to store over 400 million documents totaling 1 terabyte of data across 125 indices. Sarine uses Elasticsearch for logging application requests, monitoring system activity, collecting statistics, and visualizing and reporting on data. The document recommends how to best implement and use Elasticsearch, such as using at least three nodes, carefully designing mappings, and getting partner support.