2015-02-18 12:07 GMT+02:00 Lennart Poettering <lenn...@poettering.net>: > On Wed, 18.02.15 06:22, Andrei Borzenkov (arvidj...@gmail.com) wrote:
>> >> btrfs checksumming theoretically allows you to transparently recover >> after media corruption if filesystem has redundancy (more than one copy >> of data). Journald checksum will probably detect corruption, but can it >> repair it? > > No it cannot. > > But btrfs checksumming cannot fix things for you either if you lose > non-trivial amounts of data. It might be able to fix a few bits of > errors, but not non-trivial amounts. I mean, that's a simple property > of error correction codes: the more you want to be able to correct the > longer must your checksum be. Neither btrfs' nor journald's are > substantial enough to correct even a sector... > > Lennart > My impression is that btrfs can fix the corruption in cases where a e.g. a RAID1 of btrfs is used. As journal performance has already been sufficient for my needs on btrfs, I would prefer to be able to configure journald so that it'd keep the journal files with default flags. -Joonas _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel