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An operational view of Elasticsearch

23 Jan 2019, Guillaume Lederrey

How to scale Elasticsearch to the size of Wikipedias

If you have not entirely sold your soul to Google, you might have noticed a search box on the top right corner of Wikipedias. You might have even wondered at what’s behind it. Spoiler: it’s Elasticsearch.

Guillaume is going to give an overview of how full text search works for Wikipedias. You will learn what it takes to make Elasticsearch work for a top 5 website in 200 > langages. From the basic principles of full text search, to the scalability issues of a large site, with stop in how to design a resilient search cluster.


After a few years working for various industries in Switzerland, Guillaume decided it was time to redeem his karma. He is now working for Wikimedia Foundation (Imagine a world in which every single human being can freely share in the sum of all knowledge. That’s our commitment). His current work is focused on Site Reliability Engineering for Search, Maps and Wikidata Query Service.