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 to do it...
Once we have an initial node count, we should apply these guidelines to adjust the total count and node distribution:
- If the initial PostgreSQL node count is even, add one witness node.
- If the initial PostgreSQL node count is odd, convert one replica into a witness node.
- In the presence of two locations, the witness node should reside in the same data center as the primary node.
- If possible, allocate witness nodes in an independent tertiary location.
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