ClickHouse just hit 50,000 stars on GitHub.
Columnar storage, SQL you already know, and query speeds that make ad-hoc analytics on huge datasets actually fun.
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openalternative.co/clickhouse
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ClickHouse: Open Source Alternative to Snowflake, RedShift and BigQuery
High-performance columnar OLAP database system for real-time analytics on big data, with SQL support and linear scalability.