Elasticsearch: Indexing and Search

Welcome to the first lesson on the ELK Stack! We'll start with Elasticsearch, the 'E' in ELK.

Elasticsearch is a powerful, open-source distributed search and analytics engine. It's designed to store, search, and analyze large volumes of data quickly.

• Distributed: Runs across multiple servers.
• Real-time: Data is available for search almost instantly.
• Scalable: Easily handles growing data needs.

Elasticsearch stores data as JSON documents. Think of a document as a single record, like a row in a database, but more flexible.

Each document is a collection of fields (key-value pairs) and can contain various data types, including text, numbers, dates, and even other JSON objects.

Here's a simple example of a document: