MatteoGioioso / borealis-X2

Research project for bi-directional replication in PostgreSQL

Borealis-X2

Research project for bi-directional replication in PostgreSQL

Resources

• taminomara/psql-hooks
• PostgresConference BDR 2ndQuadrant
• multi-master-replication-solutions-for-postgresql/
• 2ndQuadrant/bdr/tree/REL0_9_94b2
• PostgreSQL's BDR and UDR Explained
• postgresql-bdr-is-bdr-truly-multi-master-is-it-open-source-and-eol-for-1-x-i
• postgresql-bi-directional-replication-using-pglogical/
• BDR extension repository entrypoint file
• Webinar: pglogical and Postgres BDR update by Simon Riggs

Writing an extension

• Citus extension entrypoint: https://github.com/citusdata/citus/blob/main/src/backend/distributed/shared_library_init.c
• Example extensions: https://github.com/postgres/postgres/tree/master/src/test/modules
• Postgres docs about extensions: C language functions
• Hooks_in_postgresql.pdf

Postgres internals

• Background workers: https://www.postgresql.org/docs/current/bgworker.html
• C language functions: https://www.postgresql.org/docs/current/xfunc-c.html
• SPI: https://www.postgresql.org/docs/current/spi.html
• Extension points: https://wiki.postgresql.org/wiki/PostgresServerExtensionPoints

Useful functions

• SetConfigOption("lock_timeout", "10000", PGC_USERSET, PGC_S_SESSION); can be used to set options
• MemoryContextSwitchTo: what is this function, why and when is needed?