Package: postgresql-16-pg-failover-slots Source: pg-failover-slots Version: 1.1.0-2.pgdg22.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 99 Depends: postgresql-16, postgresql-16-jit-llvm (>= 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-16-pg-failover-slots_1.1.0-2.pgdg22.04+1_amd64.deb Size: 43396 SHA256: c3ce93e3163e2ed9406e20d0b3ef6ae8a2a262e9391a03de69def6b55ede12a3 SHA1: 9139af5f9ad7d3c8c3b72866503ac98a72e38711 MD5sum: f0fda0d8814852c7a7de9e39241bd8b1 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