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authorLennart Poettering <lennart@poettering.net>2015-01-08 01:22:29 +0100
committerLennart Poettering <lennart@poettering.net>2015-01-08 01:22:29 +0100
commit11689d2a021d95a8447d938180e0962cd9439763 (patch)
tree83e4e1a10a219bd6344e995f445b4fe95ed54acb /system-preset
parent3c4230a5afb27faec2176d4642c0e2e145971b5c (diff)
journald: turn off COW for journal files on btrfs
btrfs' COW logic results in heavily fragment journal files, which is detrimental for perfomance. Hence, turn off COW for journal files as we create them. Turning off COW comes at the cost of data integrity guarantees, but this should be acceptable, given that we do our own checksumming, and generally have a pretty conservative write pattern. Also see discussion on linux-btrfs: http://www.spinics.net/lists/linux-btrfs/msg41001.html
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