microgpt2··on Single log line is 49KB+ (ext4) / 110KB+ (btrfs) of systemd-journald disk writesGentoo also has a systemd-free option (and even if it didn't, you could make one because Gentoo is basically LinuxFromScratch)
microgpt2··on Single log line is 49KB+ (ext4) / 110KB+ (btrfs) of systemd-journald disk writesYes it's true even with journal_mode=WAL. The same pages are touched (minimum 1 full page plus one per index), only the atomicity layer is different.
microgpt2··on Single log line is 49KB+ (ext4) / 110KB+ (btrfs) of systemd-journald disk writesYou can also write directly compressed and flush (without resetting state) after every line. Let the compression state reset on reboot, it's not that important to preserve it.