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You are here: Home1 / Blog2 / big data

Posts

Back to the Future Part 3: pg_rewind with PostgreSQL 9.6

October 17, 2016/0 Comments/in 2ndQuadrant, Giuseppe's PlanetPostgreSQL /by 2ndQuadrant Press

This is the third and last part of blog articles dedicated to pg_rewind. In the two previous articles we have seen how pg_rewind is useful to fix split-brain events due to mistakes in the switchover procedures, avoiding the need of new base backups. We have also seen that this is true for simple replication clusters, where more standby nodes are involved.

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Back to the Future Pt. 2: How to use pg_rewind with PostgreSQL 9.5

September 28, 2016/1 Comment/in 2ndQuadrant, Featured, Giuseppe's PlanetPostgreSQL /by 2ndQuadrant Press

In the previous blog article we have seen how pg_rewind works with a simple HA cluster, composed of a master node replicating to a standby. In this context, an eventual switchover involves just two nodes that have to be aligned. But what happens with HA clusters when there are several (also cascading) standbys? Now, consider […]

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Back to the Future Pt. 1: Introduction to pg_rewind

September 12, 2016/14 Comments/in 2ndQuadrant, Featured, Giuseppe's PlanetPostgreSQL /by 2ndQuadrant Press

Since PostgreSQL 9.5, pg_rewind has been able to make a former master follow up a promoted standby although, in the meantime, it proceeded with its own timeline. Consider, for instance, the case of a switchover that didn’t work properly. Have you ever experienced a "split brain" during a switchover operation? You know, when the goal […]

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