Routing Multiple Query Engines with Iceberg (18 minute read) (opens in new tab)

QueryFlux is an open-source Rust-based SQL routing proxy that intelligently directs queries across multiple query engines (Trino, Spark, DuckDB, Snowflake, Athena, Flink, etc.), sharing the same Iceberg tables. It handles protocol translation, dialect conversion via SQLGlot, cost-aware routing, concurrency control, and health-based failover.