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, […]
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 […]
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 […]
The recently released repmgr 3.1.4 update incorporates several changes which improve usability and lay out the groundwork for enhanced compatibility with 2ndQuadrant’s barman product. New configuration option restore_command It’s now possible to specify a restore_command in repmgr.conf, which will be included in the recovery.conf file generated by repmgr standby clone, making it easier to configure […]
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