Package: postgresql-11-pg-failover-slots Source: pg-failover-slots Version: 1.0.1-2.pgdg20.04+1 Architecture: amd64 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 99 Depends: libc6 (>= 2.4), libpq5 (>= 9.0~), postgresql-11, postgresql-11-jit-llvm (>= 10) Homepage: https://github.com/EnterpriseDB/pg_failover_slots/ Priority: optional Section: database Filename: pool/main/p/pg-failover-slots/postgresql-11-pg-failover-slots_1.0.1-2.pgdg20.04+1_amd64.deb Size: 41652 SHA256: d77c2caf87dedbffa7d2cba7f84cf4103848658ac73ab4703d9b267b58155fc5 SHA1: 3b7e601c2d63fd8d815deaa3e7556eae57ae74c7 MD5sum: 548e9ddc588d91d842ed75fa32003bb3 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