What is your experience with using Elasticsearch for storing and searching data?

Elasticsearch is a distributed search engine based on Lucene, which is excellent for storing and quickly searching large volumes of data. In my experience, I have used Elasticsearch for indexing logs and metrics, allowing for fast searches of necessary records using various filters and full-text queries.

Main points of usage:

• Created indexes with suitable mappings for data structuring.
• Configured sharding and replication to ensure fault tolerance.
• Used DSL queries for complex searches and aggregations.
• Integrated Elasticsearch with Kibana for data visualization.

Example query to find documents where the "user" field equals "john":

GET /my_index/_search
{
  "query": {
    "match": {
      "user": "john"
    }
  }
}