Package: postgresql-15-pg-failover-slots Source: pg-failover-slots Version: 1.1.0-2.pgdg20.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 102 Depends: postgresql-15, postgresql-15-jit-llvm (>= 10), 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-15-pg-failover-slots_1.1.0-2.pgdg20.04+1_amd64.deb Size: 43556 SHA256: c890a894e1bb405dadde9de7b6de6ab1eb4f586ea1bc5888c1b0b8a870856f17 SHA1: 899d7dc6e6d2118ee3d4967c2444715a6ce5d445 MD5sum: 327b4fee6c1e5625978130386daf39ea 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