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Before, journald would remove journal files until both MaxUse= and
KeepFree= settings would be satisfied. The first one depends (if set
automatically) on the size of the file system and is constant. But
the second one depends on current use of the file system, and a spike
in disk usage would cause journald to delete journal files, trying to
reach usage which would leave 15% of the disk free. This behaviour is
surprising for the user who doesn't expect his logs to be purged when
disk usage goes above 85%, which on a large disk could be some
gigabytes from being full. In addition attempting to keep 15% free
provides an attack vector where filling the disk sufficiently disposes
of almost all logs.
Instead, obey KeepFree= only as a limit on adding additional files.
When replacing old files with new, ignore KeepFree=. This means that
if journal disk usage reached some high point that at some later point
start to violate the KeepFree= constraint, journald will not add files
to go above this point, but it will stay (slightly) below it. When
journald is restarted, it forgets the previous maximum usage value,
and sets the limit based on the current usage, so if disk remains to
be filled, journald might use one journal-file-size less on each
restart, if restarts happen just after rotation. This seems like a
reasonable compromise between implementation complexity and robustness.
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This is a recurring submission and includes corrections to:
word omissions and word class choice.
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In journalctl(1), be more explicit about the reference to "Seal=" in
journald.conf(5) and what information can be found there.
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This includes regularly-submitted corrections to comma setting and
orthographical mishaps that appeared in man/ in recent commits.
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message
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https://bugs.freedesktop.org/show_bug.cgi?id=66657
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- place commas
- expand contractions (this is written prose :)
- add some missing words
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Reporting of the free space was bogus, since the remaining space
was compared with the maximum allowed, instead of the current
use being compared with the maximum allowed. Simplify and fix
by reporting limits directly at the point where they are calculated.
Also, assign a UUID to the message.
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As some SSDs are still seeing performance degredation when
reaching 85% usage the default value of 5% seems a little low.
Set this to 15% by default.
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Add option to force journal sync with fsync. Default timeout is 5min.
Interval configured via SyncIntervalSec option at journal.conf. Synced
journal files will be marked as OFFLINE.
Manual sync can be performed via sending SIGUSR1.
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Alias as systemd-user.conf is also provided. This should help
users running systemd in session mode.
https://bugzilla.redhat.com/show_bug.cgi?id=690868
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There's no point in making this configurable, so let's drop it in order
to simplify configuration a bit.
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This also enables time-based rotation (but not vacuuming) after 1month,
so that not more one month of journal is lost at a time per vacuuming.
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implements
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"permanent" is simply the wrong term and we use "persistant" in most
other contexts to correct this.
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console forwarding
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We finally got the OK from all contributors with non-trivial commits to
relicense systemd from GPL2+ to LGPL2.1+.
Some udev bits continue to be GPL2+ for now, but we are looking into
relicensing them too, to allow free copy/paste of all code within
systemd.
The bits that used to be MIT continue to be MIT.
The big benefit of the relicensing is that closed source code may now
link against libsystemd-login.so and friends.
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