Hi Chris, This weekend past, I did create /opt and /var as subvolumes. For the empty /opt, it was easy. For /var, it took the live ISO to help with moving directory /var to subvolume /var I also intend to do the same with /sys on this, my beta system, Later this week I will install the "release version" on a second drive as a second system, when it is available. The rational for my doing the subvolume exercise is the following: 1) Under default installation, each snapfile of root has a copy of all subdirectories including active /var, and /sys. I noted that /var/log and /var/cache is rather volatile. My SSD size is 120gigs 2) By isolating /var, /opt and /sys the root snapshot becomes less bloated. 3) The /sys directory rarely has changes according to my survey of directory and file dates. One subvolume taken when there is a change is OK for me. 4) But /var/log is quite active, as is /var/cache. I will be using btrfs defragment on /var. 5) Having /var as nodatacow puts /var to the same risk level as when /var was on the ext4 system. I will be using fstrim -a (to do SSD trims) and I want to user snapper, to manage the subvolume snapshots. The generations of snapshots for /var and / will be my objective. I will be using crontab and a script to take snapshots just before the script launches "sudo dnf update -y". This switch to btrfs is a learning experience for me. Fedora is my passion, From my studies, I may discover that you are absolutely right to state that I do not need to make the extra subvolumes. The advantage I have over you is my career. It is called "retirement". Retirement comes with spare time to study, to learn, to write code, to explore, experiment and to share experiences. _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
