On Wed, Jan 19, 2022, at 6:38 AM, Neal Gompa wrote: > On Wed, Jan 19, 2022 at 6:05 AM Casey Jao via devel > <devel@lists.fedoraproject.org> wrote: >> >> Doesn't rpm-ostree already provide transactional, image-based updates >> without the use of filesystem snapshots? In addition, roofs snapshots are >> only really useful if they are coordinated with bootloader management, which >> is already built into rpm-ostree but not yet written for a hypothetical >> btrfs-based atomic os updater. > > I think the bigger value would be around being able to use filesystem > snapshots with /var.
Right. In the ostree model the idea is all user data (except config files in /etc) are in /var. So if you want to back up all machine-local state (including your home directories, container storage, libvirt VMs, etc.), you just need one filesystem to save. It could make sense to save a snapshot of /var before performing major OS upgrades. But they're not strictly related. (As an aside: personally, I think snapshots have mostly just obscure use cases versus backup systems) I would agree with Casey though in that the opposite case of trying to snapshot /usr (and then boot it) outside of ostree's control is likely to confuse ostree at best at least today. _______________________________________________ devel mailing list -- devel@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org 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@lists.fedoraproject.org Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
