> Database

1 - About

Elasticsearch is an open source, distributed, RESTful full-text search and analytics engine (Database - Document Database)


3 - Structure

3.1 - Index

An index is a collection of documents that have somewhat similar characteristics. For example, you can have an index for customer data, another index for a product catalog, and yet another index for order data.

3.2 - Document

A document is a basic unit of information that can be indexed. For example, you can have a document for a single customer, another document for a single product, and yet another for a single order. This document is expressed in JSON.

4 - Installation

5 - Health

GET /_cat/health?v
epoch      timestamp cluster        status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent
1512509439 21:30:39  docker-cluster yellow          1         1      6   6    0    0        6             0                  -                 50.0%