pglogical
The next generation of logical replication for PostgreSQL
pglogical is a logical replication system implemented entirely as a PostgreSQL extension. Fully integrated, it requires no triggers or external programs. This alternative to physical replication is a highly efficient method of replicating data using a publish/subscribe model for selective replication.
pglogical forms the foundation for BDR – which runs as an extension on top of it – providing the essential logical replication and other technologies for its features.
Connect PostgreSQL with other data sources and targets
The 3rd generation of pglogical separates out the receiver and writer processes, creating a pluggable architecture for non-PostgreSQL subscribers & providers. pglogical already supports Kafka and RabbitMQ, with many more in the pipeline.
Minimize downtime with physical failover
pglogical has the ability to failover to a physical standby, thereby ensuring that all standby databases in the cluster remain available as standbys to the new primary. A physical failover ensures that all data is present in the new primary, rather than a subset – as opposed to failing over to a logical standby, which does not guarantee the entire dataset.
Transparent partitioning support
Through seamless integration of partitioned tables, pglogical allows you to specify the root table and replicates all partitions. Different partitioning configurations can be defined on the subscriber, including replication of a non-partitioned table to a partitioned one, and vice versa. Partitioning support is elastic, allowing to add and remove partitions transparently.
Row and column filters
Taking advantage of logical replication, pglogical allows to filter rows and/or columns that need to be replicated to the standby database. Being selective during replication allows for reduced traffic, as well as data segregation as needed.
Availability
pglogical 2.3.3 released – October 5, 2020
pglogical is available for PostgreSQL 9.4 – 13. It is available via 2ndQuadrant’s apt and yum repositories for Debian and Red Hat family (RHEL, CentOS, and Fedora). You can use standard apt and yum package managers for installing pglogical with your instance of PostgreSQL.
Detailed installation instructions are available here.
Complete documentation is available here.
Release notes are available here.
You can also access github repository.
pglogical is fully open source, released under the PostgreSQL licence with copyright novated to the PostgreSQL Development Group.
PG Phriday: 10 Things Postgres Could Improve – Part 2
/0 Comments/in Shaun's PlanetPostgreSQL /by Shaun ThomasLast week, we examined Postgres XID wraparound complications in greater depth to see exactly how easily they can surprise even prepared enterprises. But we also found the real problem areas and how to mitigate them specifically. In this continuing series to plumb the depths of Postgres constructively, we’re going to focus on some of the […]
Failover slots for PostgreSQL
/0 Comments/in Craig's PlanetPostgreSQL /by craig.ringerLogical decoding and logical replication is getting more attention in the PostgreSQL world. This means we need it working well alongside production HA systems – and it turns out there’s a problem there. Replication slots are not themselves synced to physical replicas so you can’t continue to use a slot after a master failure results […]
Webinar: pglogical and Postgres-BDR Update [Follow Up]
/0 Comments/in 2ndQuadrant, Liaqat's PlanetPostgreSQL /by Liaqat AndrabiSince the release of v3, Postgres-BDR has evolved into the go-to clustering technology built specially for businesses that require geographically distributed databases with multiple masters. To get an update on Postgres-BDR’s development, new features, and future roadmap, 2ndQuadrant held the pglogical and Postgres-BDR Update webinar as part of its PostgreSQL webinar series. The webinar was […]