Package: postgresql-17-pg-failover-slots Source: pg-failover-slots Version: 1.1.0-2.pgdg22.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 101 Depends: postgresql-17, postgresql-17-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-17-pg-failover-slots_1.1.0-2.pgdg22.04+1_amd64.deb Size: 44872 SHA256: 36027222eb725fd78febf1c415d8ac2fb962b7ff0136bf4822023df72cc40ad1 SHA1: 2669d786be3a600f6351c318de0e67acefc80a2e MD5sum: 0bc59f4cc1799521d9b4a92a7d929a04 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