[thirdparty/systemd.git] / tmpfiles.d / journal-nocow.conf

#  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 inherited 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
Commit	Line	Data
3a92e4ba GB	1	# This file is part of systemd.
	2	#
	3	# systemd is free software; you can redistribute it and/or modify it
	4	# under the terms of the GNU Lesser General Public License as published by
	5	# the Free Software Foundation; either version 2.1 of the License, or
	6	# (at your option) any later version.
	7
	8	# See tmpfiles.d(5) for details
	9
	10	# Set the NOCOW attribute for directories of journal files. This flag
9c63ba98	11	# is inherited by their new files and sub-directories. Matters only
3a92e4ba GB	12	# for btrfs filesystems.
	13	#
	14	# WARNING: Enabling the NOCOW attribute improves journal performance
	15	# substantially, but also disables the btrfs checksum logic. In
	16	# btrfs RAID filesystems the checksums are needed for rebuilding
	17	# corrupted files. Without checksums such rebuilds are not
	18	# possible.
	19	#
	20	# In a single-disk filesystem (or a filesystem without redundancy)
	21	# enabling the NOCOW attribute for journal files is safe, because
	22	# they have their own checksums and a rebuilding wouldn't be possible
	23	# in any case.
	24
	25	h /var/log/journal - - - - +C
	26	h /var/log/journal/%m - - - - +C
	27	h /var/log/journal/remote - - - - +C