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Diffstat (limited to 'src/grp-journal/journal-nocow.tmpfiles')
| -rw-r--r-- | src/grp-journal/journal-nocow.tmpfiles | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/grp-journal/journal-nocow.tmpfiles b/src/grp-journal/journal-nocow.tmpfiles new file mode 100644 index 0000000000..e7938c8911 --- /dev/null +++ b/src/grp-journal/journal-nocow.tmpfiles @@ -0,0 +1,27 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +# See tmpfiles.d(5) for details + +# Set the NOCOW attribute for directories of journal files. This flag +# is inheredited by their new files and sub-directories. Matters only +# for btrfs filesystems. +# +# WARNING: Enabling the NOCOW attribute improves journal performance +# substantially, but also disables the btrfs checksum logic. In +# btrfs RAID filesystems the checksums are needed for rebuilding +# corrupted files. Without checksums such rebuilds are not +# possible. +# +# In a single-disk filesystem (or a filesystem without redundancy) +# enabling the NOCOW attribute for journal files is safe, because +# they have their own checksums and a rebuilding wouldn't be possible +# in any case. + +h /var/log/journal - - - - +C +h /var/log/journal/%m - - - - +C +h /var/log/journal/remote - - - - +C |