Package: postgresql-13-pg-failover-slots Source: pg-failover-slots Version: 1.1.0-2.pgdg22.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 100 Depends: postgresql-13, postgresql-13-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-13-pg-failover-slots_1.1.0-2.pgdg22.04+1_amd64.deb Size: 43468 SHA256: fe086a6c4fc524900d5bb42330fe1ee3f57bd592024698c1cc752304521cce89 SHA1: d0c9ae1408b435b994c663af4c0fc97481600763 MD5sum: 22fe8ddbdf2cf1090fb7a31fd3b6d289 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