https://nryanov.com/tags/streaming-replication/Recent content in Streaming-Replication on Nikita RyanovHugoen-usThu, 10 Feb 2022 22:50:00 +0300https://nryanov.com/postgresql/postgresql-streaming-replication/Thu, 10 Feb 2022 22:50:00 +0300https://nryanov.com/postgresql/postgresql-streaming-replication/<h1 id="prerequisite">Prerequisite <!-- raw HTML omitted --><!-- raw HTML omitted --></h1> <p>All examples assume that postgresql is already installed on your machine. Also, all examples are created using <code>PostgreSQL 14.1 on aarch64-apple-darwin20.6.0, compiled by Apple clang version 13.0.0 (clang-1300.0.29.3), 64-bit</code>.</p> <h1 id="streaming-replication">Streaming replication <!-- raw HTML omitted --><!-- raw HTML omitted --></h1> <p>Streaming replication is a built-in mechanism in PostgreSQL to replicate data between multiple servers. It is a low-level replication mechanism as it streams WAL data from primary server to the replica through the physical replication slot, so it is highly recommended to replicate data between servers using similar PostgreSQL major version (minor versions could be different). Also, it is a good idea to have equal servers in terms of server configuration such as CPU, RAM and Disks, especially if you consider to promote replica to master if primary server goes down.</p>