PostgreSQL 12 High Availability Cookbook - Third Edition

How it works...

Our first step is to find our current kernel version as this will dictate which settings have been defaulted to our desired values. Then, we continue with the mount command and specify -t to set the filesystem type to xfs. The last two parameters to the mount command define the device we are mounting and which directory it should be attached to. In this case, we use our /dev/VG_POSTGRES/LV_DATA device and the /db directory that we've discussed throughout this book.

All of the parameters prefixed with -o are options that mount should apply during the mounting process. These options define how certain aspects of the filesystem behave. Here is a quick overview of the options we selected and what they mean:

• We use noatime to ...