Package: postgresql-13-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-13, postgresql-13-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-13-pg-failover-slots_1.1.0-2.pgdg20.04+1_amd64.deb Size: 43460 SHA256: bee64ac1d48fe58f3e9107e422fef6a64aa940d52581e400d85f5ac2eadec7b3 SHA1: 56d7196ce8bdc40c5c752bb79041eb018a42d748 MD5sum: b8c713e2e6a9cb0d106253c22835431b 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