February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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How it works...
At its heart, this recipe is really just a combination of three other recipes:
- Obtaining and installing BDR
- Creating an additional BDR node
- Performing a managed node switchover
The beauty of the multi-master approach is that so long as the nodes can communicate, we have completed our upgrade process by simply adding another node of a higher version. We can either retain the node we're replacing or remove it from the cluster as part of a full upgrade and replace procedure.
As a result, the first few steps merely involve creating a fresh and empty PostgreSQL instance on pgha3 to receive the data from our cluster. While doing this, we want to copy any existing global objects from the existing cluster, such as users and roles. ...
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