Elasticsearch is an open search and analytics program for Windows capable of processing various kinds of data, including textual, numerical, geospatial, structured and unstructured. The utility is well-known for its simple REST APIs, distributed nature, speed and flexibility. If you want to simply find files on your computer, you may use a special tool called Copernic Desktop Search.

Principle of operation

Raw data may be imported into the software from a wide range of sources, such as logs, system metrics and Web applications. Data ingestion is the process by which the imported statistics are parsed, normalized and enriched before being indexed by Elasticsearch.

After this step, you can run complex queries against your data and use aggregations to retrieve summaries. Thanks to the Kibana module, you have the ability to produce powerful visualizations, share dashboards and more.

Indexing

An index is a compilation of documents that are related to each other. The program stores this information in JSON format. Thus, each item correlates a set of keys with their corresponding values, including strings, numbers, dates and geolocations.

It is necessary to mention that the tool uses a data structure called an inverted index, which is designed to enable quick full-text searches. Basically, it lists every unique word that appears in your documents and identifies all occurrences by item.

Features

free to download and use;
compatible with modern Windows versions;
gives you the ability to process and search data;
you can run complex queries and retrieve summaries;
it is possible to list every unique word in your documents.