elasticsearchHow do I explain Elasticsearch to a beginner?

Elasticsearch is a powerful open-source search engine built on top of Apache Lucene. It is a distributed, RESTful search and analytics engine capable of solving a growing number of use cases.

Elasticsearch provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents. It stores and indexes data using a document-oriented data model, making it easier to search and analyze data quickly.

Example code

GET /my_index/_search
{
  "query": {
    "match_all": {}
  }
}

Output example

{
  "took": 3,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 2,
      "relation": "eq"
    },
    "max_score": null,
    "hits": [
      {
        "_index": "my_index",
        "_type": "_doc",
        "_id": "1",
        "_score": null,
        "_source": {
          "title": "My first document",
          "text": "This is my first document"
        }
      },
      {
        "_index": "my_index",
        "_type": "_doc",
        "_id": "2",
        "_score": null,
        "_source": {
          "title": "My second document",
          "text": "This is my second document"
        }
      }
    ]
  }
}

Code explanation

• GET: This is the HTTP method used for the request.
• /my_index/_search: This is the Elasticsearch endpoint for running searches.
• query: This is the query object which contains the query to be executed.
• match_all: This is the query type used to match all documents in the index.

Helpful links

• Elasticsearch Documentation
• Elasticsearch Tutorial

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