Elastic Stack

Mirror, Mirror on the Wall

November 11, 2019

Reading the title of this blog post, you will likely associate the title with the fairy tale Snow White and the Seven Dwarfs. An association is a connection in mind for two related terms. It is a creative process that the human brain is so good at it. Another creative process is using synonyms.

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Okapi BM25 with Game of Thrones

September 1, 2019

Since Elasticsearch 5, the default similarity algorithm for Elasticsearch is Okapi BM25. A similarity (scoring/ranking model) defines how matching documents are scored. Performing a search against a set of documents gives you results sorted by relevance. In one of our previous blog posts by Rocco Schulz, BM25 was already mentioned. In this blog article, we are going to look into the inner workings of the Okapi BM25 algorithm.

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Game On - Elastic Stack with FIFA 2019

August 16, 2019

This article is the beginning of our Elastic Stack article series, that explains the Elastic Stack for Beginners and curious people. I use football data as the basis for our demonstrations and examples for three reasons. The first reason is that the football (soccer) season starts again this weekend. I live in the city of the current Swiss Football champion (Bsc Young Boys). I want them to succeed again this season. The final reason is my little nephew. On my summer vacation visit, my nephew asked me what I do for a living in Switzerland: Software Engineering and Architecture for Distributed…

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