On Wed, Apr 14, 2021 at 11:37 PM TheEvilSkeleton <theevilskeleton@xxxxxxxxxx> wrote: > > I'd like to suggest to use noatime mount option for btrfs. > > I've come across two posts about combining atime with btrfs. Unfortunately those two should not be combined, as explained here: https://lwn.net/Articles/499293/; and here: Why I experience poor performance during file access on filesystem? > > TL;DR: btrfs and atime should not be combined because it causes more problems than it fixes due to the nature of CoW. CoW already does what atime should do, so we are essentially losing a lot more performance than we should, just because we have atime. Another thing, reading files after a snapshot can cause files to grow considerably. > > I would suggest to use noatime mount option by default for increased performance and to prevent high space consumption. This had been actively discussed in the Fedora Btrfs project a while back: https://pagure.io/fedora-btrfs/project/issue/9 The current consensus is that relatime mitigates most of the issues while preserving atime-centric workflows. We do disable atime for SBCs because regardless of filesystem, noatime drastically improves performance for all the crappy ARM boards in existence. -- 真実はいつも一つ！/ Always, there's only one truth! _______________________________________________ test mailing list -- test@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to test-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/test@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
