Elasticsearch

In this article, we’ll learn about the inverted index and how it helps Elasticsearch to search documents faster than other NoSQL databases. Introduction Suppose you want to know which poems of Hafez have words زُلف and شب (boolean retrieval). How will you do that? One way is to use the Unix…

Perhaps making an index read-only may be a strange thing to hear, but it is possible to perform this type of operation in Elasticsearch. Imagine a situation in which you exceptionally need to restrict writing operations to your index, be it maintenance, a business rule or any other reason. Let’s learn…

In this blog post, we will be discussing monitoring and logging in Kubernetes. Monitoring and logging are essential for understanding the health and performance of your applications, as well as troubleshooting any issues that may arise. Kubernetes provides several built-in tools for monitoring and logging, as well as several third-party…

A token filter that lets you define a list of words that lets you generate tokens is what the Keep words token filter does. In some situations we can have a field with several words, however it may not be interesting to make all the words in the field a…

The excerpts are taken from my book Elasticsearch in Action, Second Edition. The code is available in my GitHub repository. You can find executable Kibana scripts in the repository so you can run the commands in Kibana straight away. All code is tested against Elasticsearch 8.4 version. Me @ Medium…

Today I’m going to make a reading recommendation for anyone who wants to understand how Elasticsearch defines document relevance and who seeks to evolve their search queries. The recommendation is to read the book Relevant Search. This book describes how some clauses used in search queries impact the relevance of…

Today’s tip is about using the Remove Processor to eliminate unused fields from your index. The use of the Remove processor is very simple and it is flexible enough to allow adding conditionals. In our example we have a field called “category”, this field will be replaced by a new field…

The excerpts are taken from my book Elasticsearch in Action, Second Edition. The code is available in my GitHub repository. You can find executable Kibana scripts in the repository so you can run the commands in Kibana straight away. All code is tested against Elasticsearch 8.4 version. Me @ Medium…