Different Approaches for MVCC used in well known Databases

With the introduction of failover slots in PostgreSQL-17, logical replication can now be effectively utilized in high-availability environments. This feature ensures that logical replication continues seamlessly even if the publisher node fails and its physical standby is promoted as the new publisher.To maintain continuous replication after a...

In my last blog post, Evolution of Logical Replication, I mentioned the future development of a feature to allow "upgrades of logical replication nodes." The upcoming release of PostgreSQL 17 includes this feature. Previously, after major version upgrades (via pg_upgrade), users couldn't immediately connect and write data to logical replication...

This blog post is about how the Logical Replication has evolved over the years in PostgreSQL, what's in the latest release-16, and what's being worked upon for future releases. Logical replication is a method of replicating data objects and their changes, based upon their replication identity (usually a primary key). We use the term logical in...

There are various areas in PostgreSQL like Partitioning, Logical Replication, Parallel Query, Vacuum, etc. which improve with each new version. In this blog, I'll summarize the various enhancements in Logical Replication that users could see in the recently released PostgreSQL 15. You can read the enhancements in this area in the previous release...

In the upcoming release of PostgreSQL-14, we will see multiple enhancements in Logical Replication which I hope will further increase its usage. This blog is primarily to summarize and briefly explain all the enhancements in Logical Replication.Decoding of large transactions:Allow streaming large in-progress transactions to subscribers. Before...