Fencing a Postgres primary that might still be alive

T1Covered by 1 source · first reported by Databricks / ClickHouse / DuckDB / Supabase / Neon / PlanetScale at 04 Nov, 14:05 UTC

Promoting a standby doesn't stop the old Postgres primary from taking writes. Here's how the control plane behind ClickHouse Managed Postgres fences it on bare metal, AWS and GCP, and why the design is fail-open.

cloud

Sources

• T1Fencing a Postgres primary that might still be aliveDatabricks / ClickHouse / DuckDB / Supabase / Neon / PlanetScale04 Nov, 14:05