May 2017
Beginner
416 pages
10h 37m
English
Content preview from Mastering PostgreSQL 9.6
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Use cases of logical slots
There are various use cases of replication slots. The most simplistic use case is the one shown here. Data can be fetched from the server in the desired format and used to audit, debug or simply monitor a database instance.
The next logical step of course is to take this stream of changes and use it for replication. Solutions such as BDR are totally based on logical decoding because changes on the binary level would not work with multi-master replication.
Finally, there is the need to upgrade without downtime. Remember, the binary transaction log stream cannot be used to replicate between different versions of PostgreSQL. Therefore, future versions of PostgreSQL will support a tool called pglogical, which helps ...
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