Package: postgresql-12-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-12, postgresql-12-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-12-pg-failover-slots_1.1.0-2.pgdg22.04+1_amd64.deb Size: 43252 SHA256: ad0bbe542d2603edd4d887108dc4c58c22b89913e477737482d5bdaa3618c090 SHA1: 8d4c19df72788fe29b290ff663a38280b7f4f446 MD5sum: 3fa6a9788cd631530c18a995458d981c 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