Powerful Full-Text Search

• Advanced relevance scoring with BM25 algorithm

• Multi-language analysis with language-specific tokenizers

• Phrase matching and proximity queries

• Fuzzy matching for misspellings and typos

• Synonyms and stop words handling

• Highlighting for search term visualization

Distributed Architecture

• Horizontally scalable from single node to hundreds

• Automatic sharding and replication

• Cross-cluster replication for geographic distribution

• Resiliency with primary and replica shards

• No single point of failure design

• Auto-healing capabilities after node failures

Real-Time Analytics

• Aggregation framework for complex data analysis

• Near real-time search and analytics capabilities

• Time series data analysis with date histograms

• Geospatial data analysis and visualization

• Statistical and mathematical operations

• Anomaly detection and forecasting

Schema Flexibility

• Dynamic mapping for automatic field detection

• Custom field mappings for precise control

• Multi-field indexing for different analysis methods

• Runtime fields for on-the-fly calculations

• Index templates for consistent mapping

• Data streams for time series optimization

Performance Optimization

• Inverted index for fast full-text search

• Doc values for efficient aggregations

• Field data caching for frequent operations

• Query and request caching

• Circuit breakers to prevent memory overload

• Asynchronous operations for bulk processing

Search Experience Enhancement

• Autocomplete and search-as-you-type

• Did-you-mean suggestions

• Faceted navigation for filtering

• Boosting and relevance tuning

• Scripted scoring for custom relevance logic

• Ranking profiles for different use cases

Enterprise Security

• Role-based access control

• Document/field-level security

• Transport and REST layer encryption

• Audit logging for compliance

• SAML, LDAP, and Kerberos integration

• IP filtering and API key authentication

Observability and Management

• Comprehensive monitoring APIs

• Cluster health and status tracking

• Thread pool statistics

• Detailed searchable logs

• Performance metrics and analysis

• Snapshot and restore for backup

Developer-Friendly APIs

• RESTful JSON API for all operations

• Language clients for popular programming languages

• SQL support with OpenSearch SQL

• High-level REST client for Java

• Bulk operations for efficiency

• Scroll API for large result sets