February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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How it works...
Do these steps seem familiar? They should! With a few minor exceptions, this is almost the same as the steps we used in the Getting started with the LVM recipe. Unlike the other instructions, we don't need to partition the /dev/drbd0 device and can immediately add it to LVM with pvcreate.
Following this, we use vgcreate to define a new volume group named VG_POSTGRES, containing /dev/drbd0 as its only device. The definition for this volume group actually exists on the /dev/drbd0 device itself, meaning it is replicated by DRBD to the other node. This is why we only need to execute these commands on pg1.
Next, we use lvcreate with the -n parameter to create a logical volume named LV_DATA within the VG_POSTGRES group. This time, ...
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