Citus 11.1 is out! Now you can shard Postgres without interruption. Read all about it in Marco’s 11.1 blog. 💥
When those of us who work on Postgres High Availability explain how HA in Postgres works, we often focus on the server side of the stack. Having a Postgres service running with the expected data set is all-important and required for HA, of course. That said, the server side of the stack is not the only thing that matters when implementing high availability. Application code has a super important role to play, too.
In this post, you will learn what happens to your application code and connections when a Postgres failover is orchestrated. Your application might be running on Postgres on-prem with HA configured—or in the cloud—or on a managed PostgreSQL service such as Azure Database for PostgreSQL. Now, if you’re running your app on top of a managed service with HA, you probably don’t need to worry about how to implement HA, as HA is managed by the service. But it’s still useful to understand what happens to your application when a Postgres failover occurs.Keep reading