Chapter 1. Introduction to Efficient Indexing
Elasticsearch is an open source full text search engine and data analysis tool that was developed in Java, is Apache Lucene-based, and scalable. A huge scale of data is produced at every moment in today's world of information technologies, in social media, in video sharing sites, and in medium and large-sized companies that provide services in communication, health, security, and other areas. Here we are talking about an information/data ocean, and we call this ocean briefly as big data in the world of information technology. An important part of this world of big data is unstructured, scattered, and insignificant when it is in isolation.
For this reason, some requirements such as recording, accessing, ...
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