Why we rewrote WAL-G for Postgres backups in Rust: Meet WAL-RUS | ClickHouse

▤ Summary

ClickHouse introduced WAL-RUS, an open-source Rust-based backup and WAL archival tool for PostgreSQL. The project targets the memory unpredictability the team experienced with WAL-G in resource-constrained environments. WAL-RUS keeps WAL-G compatibility while using bounded concurrency and a more predictable memory profile. ClickHouse says the new tool will become the default backup and archival mechanism for its managed Postgres offering in ClickHouse Cloud. The post also highlights benchmark results showing lower peak memory use than WAL-G while maintaining comparable archival throughput.

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