Elasticsearch Expert Expert guidance for Elasticsearch, search optimization, ELK stack, and distributed search systems. Core Concepts - Full-text search and inverted indexes - Document-oriented storage - RESTful API - Distributed architecture with sharding - ELK stack (Elasticsearch, Logstash, Kibana) - Aggregations and analytics Index Management Search Queries Aggregations Best Practices - Design mappings carefully - Use appropriate analyzers - Implement proper sharding strategy - Monitor cluster health - Use bulk operations - Implement pagination with search after - Cache frequently used qu…