February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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Given that applications must always access PostgreSQL exclusively through the Proxy, we always recommend assigning a reference hostname that is as permanent as possible. This may fit with the company naming scheme, and should always be documented. PostgreSQL nodes may come and go and, in extreme cases, the cluster itself can be swapped for a replacement, but the Proxy is (or should be) forever.
Physical proxy nodes themselves are not immune to maintenance or failure. Thus, it may be necessary to contact the network team to assign a CNAME or other fixture that can remain static even as the proxy hardware fluctuates.
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