Time-Series, Search & Analytics
Engines for metrics, full-text search and fast analytical queries.
Beginner
Start here. No background needed beyond school maths.
DuckDB Documentation
A fast, free analytics database that runs inside your laptop or notebook and queries CSV and Parquet files with plain SQL.
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Elasticsearch Guide
The official guide to Elasticsearch: indexing documents, full-text search, aggregations and scaling a cluster.
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InfluxDB Documentation
Learn time-series data: writing metrics from sensors and servers, and querying them over time.
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OpenSearch Documentation
Docs for the open-source search and analytics suite: search, log analytics, dashboards and vector search.
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TimescaleDB Documentation
Time-series on top of PostgreSQL: hypertables, compression and continuous aggregates for sensor and monitoring data.
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Advanced
Once the basics are comfortable.