Package: postgresql-17-pg-failover-slots Source: pg-failover-slots Version: 1.2.0-1.pgdg22.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 102 Depends: postgresql-17, 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-17-pg-failover-slots_1.2.0-1.pgdg22.04+1_amd64.deb Size: 45280 SHA256: 4bef9cc7267c5b97f6ed05c6fdae36df5ef80c01d8dad0b5ebc272e63ea7a238 SHA1: bf573228e9b40459f32ccbd6062d3d59d7892cf3 MD5sum: fbcc052a06d64155cbd1c4903e370040 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