Package: postgresql-15-pg-failover-slots Source: pg-failover-slots Version: 1.2.0-1.pgdg22.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 100 Depends: postgresql-15, libc6 (>= 2.4), libpq5 (>= 9.0~) Homepage: https://github.com/EnterpriseDB/pg_failover_slots/ Priority: optional Section: database Filename: pool/main/p/pg-failover-slots/postgresql-15-pg-failover-slots_1.2.0-1.pgdg22.04+1_amd64.deb Size: 43728 SHA256: 4a5686f7d4d7da4f25797ffadd415490e2708e5f08846e8f6a574328329b4454 SHA1: 1d6006d70a079b6203a01879596a888fb398b425 MD5sum: e35cadf7eca4131ca1aaf467ca5cf410 Description: High-availability support for PostgreSQL logical replication This extension is for anyone with Logical Replication Slots on Postgres databases that are also part of a Physical Streaming Replication architecture. . Since logical replication slots are only maintained on the primary node, downstream subscribers don't receive any new changes from a newly promoted primary until the slot is created, which is unsafe because the information that includes which data a subscriber has confirmed receiving and which log data still needs to be retained for the subscriber will have been lost, resulting in an unknown gap in data changes. PG Failover Slots makes logical replication slots usable across a physical failover using the following features: . - Copies any missing replication slots from the primary to the standby - Removes any slots from the standby that aren't found on the primary - Periodically synchronizes the position of slots on the standby based on the primary - Ensures that selected standbys receive data before any of the logical slot walsenders can send data to consumers