Package: postgresql-13-pg-failover-slots Source: pg-failover-slots Version: 1.0.1-1.pgdg18.04+1 Architecture: i386 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 92 Depends: postgresql-13, 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_1.0.1-1.pgdg18.04+1_i386.deb Size: 42292 SHA256: 755b04536fa12131ed3dcc8abf3cf15b58eeaeeba70a70f8e4eac98af7f0e7a3 SHA1: 439229771c1138b8926d46e2a6b03b3ca46977a3 MD5sum: 0d8e88d437630df7dd7ae35e42e29ed7 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