June 2024
Intermediate to advanced
456 pages
11h 34m
English
Content preview from High Performance PostgreSQL for RailsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Creating a Replica Using Logical Replication
In this section, you’ll go back to the roots of this chapter and muck around with the PostgreSQL configuration. Instead of configuring physical replication, you’ll set up “logical” replication. Fortunately, you’ll re-use much of what you did before, so it will be less work.
What is logical replication? Logical replication is different in that it’s a configurable type of replication. With logical replication, you can choose specific databases, specific tables, and even specific DML operations within those tables to replicate. For example, you’ll configure replication to send only INSERT operations.
Logical replication has a big trade-off, though. Only DML operations (as of PostgreSQL 16) are replicated. ...
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