PostgreSQL Replication with Bucardo
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Bucardo is an open source, asynchronous PostgreSQL replication system that allows for multi-master and multi-slave configurations. It was developed by Jon Jesen and Greg Sabino and is free to use under a BSD license. Bucardo supports master-master replication, conflict resolution, and custom code. It uses push delta, full copy, or swap replication methods and manages database objects in "herds" that are synced between databases.
PostgreSQL Replication with Bucardo
- 3. Bucardo • async PostgreSQL replication system • allow multi-master and multi-slave op • Developed by Jon Jesen and Greg Sabino • Free and Open Source (BSD License)
- 4. Bucardo Capabilities • master to master • conflict resolution • custom code
- 5. Sync Types • Push Delta • Full Copy • Swap
- 6. Bucardo Terms • Goat : database object such as tables and sequence • Herd : a group of goats • Sync : sync event. one sync, one herd
- 8. Installing (Ubuntu 14.04) • add repo : deb http://apt.postgresql.org/pub/repos/ apt/ trusty-pgdg main • install requirement : • perl, dbix-safe-perl, postgresql-plperl • get source code : https://github.com/bucardo/ bucardo/archive/5.3.1.tar.gz
- 9. Config • ./bucardo install • ./bucardo add all tables db=source_db • ./bucardo add all sequences db=source_db • ./bucardo add herd copying_herd all tables
- 10. El Replicado • Test • ./bucardo validate all • Replicate • ./bucardo add sync vidio_sync relgroup=copying_herd dbs=source_db:source,dest_db:target onetimecopy=2 • ./bucardo start
- 11. Inside Bucardo
- 13. Status
- 14. Bucardo Log
- 15. How Bucardo Replicate INSERT/UPDATE/ DELETE BUCARDO ADD DELTA BUCARDO TRIGGER SYNC CONTROLLER SYNC KID NOTIFY/ LISTEN REPLICATION EVENT
- 16. Verdict • No lock on slave • Conflict resolution • Multi Master and Multi Slave • ————————————————- • not for HA / Failover • not available on windows