April 2018
Intermediate to advanced
508 pages
15h 22m
English
Content preview from PostgreSQL 10 High Performance - Third Edition
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Upgrading to a newer major version
Until very recently, the only way to upgrade an existing PostgreSQL version to a newer major version, such as going from 8.1.X to 8.2.X, was to dump and reload. The and/or programs are used to write the entire content of the database to a file, using the newer versions of those programs. That way, if any changes need to be made to upgrade, the newer dumping program can try to handle them. Not all upgrade changes will happen automatically though. Then, depending on the format you dumped in, you can either restore that just by running the script it generates or use the program to handle that task. pg_restore can be a much better alternative in newer PostgreSQL versions that include a version with parallel ...
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