Trusted teacher: Elasticsearch is a NoSQL database whose particularity is to be able to index strongly text-oriented documents. You could think of it as a search engine, but you could set it up to exactly match your search needs. Elasticsearch is therefore a search engine capable of storing a large quantity of documents and which can be queried in real time. In addition, its query language provides interesting interrogation possibilities that can be exploited to extract statistics in real time. In this course I explain how you can design your Elasticsearch cluster in an efficient way and also use it to index / search your data.