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| author | Dimitry Ishenko <dimitry.ishenko@gmail.com> | 2021-07-07 13:54:47 -0400 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2021-08-09 21:06:28 +0200 |
| commit | 33e82f3ef33a2497f9838a5fbb924c7501d8dd9e (patch) | |
| tree | 1aa4934bc6101cedc779e9d7ba6367e9d283d25d /man | |
| parent | 8a513eee30ac5128d3176bec90c8ed118764c54f (diff) | |
| download | systemd-33e82f3ef33a2497f9838a5fbb924c7501d8dd9e.tar.gz | |
timesync: add option to periodically save time
Diffstat (limited to 'man')
| -rw-r--r-- | man/systemd-timesyncd.service.xml | 9 | ||||
| -rw-r--r-- | man/timesyncd.conf.xml | 12 |
2 files changed, 17 insertions, 4 deletions
diff --git a/man/systemd-timesyncd.service.xml b/man/systemd-timesyncd.service.xml index 9ab4af9763..34e0a67472 100644 --- a/man/systemd-timesyncd.service.xml +++ b/man/systemd-timesyncd.service.xml @@ -75,10 +75,11 @@ <term><filename>/var/lib/systemd/timesync/clock</filename></term> <listitem> - <para>The modification time ("mtime") of this file indicates the timestamp of the last successful - synchronization (or at least the systemd build date, in case synchronization was not possible). It - is used to ensure that the system clock remains roughly monotonic across reboots, in case no local - RTC is available.</para> + <para>The modification time ("mtime") of this file is updated on each successful NTP synchronization + or after each <varname>SaveIntervalSec=</varname> time interval, as specified in + <citerefentry><refentrytitle>timesyncd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>. + At the minimum, it will be set to the systemd build date. It is used to ensure that the system clock + remains roughly monotonic across reboots, in case no local RTC is available.</para> </listitem> </varlistentry> diff --git a/man/timesyncd.conf.xml b/man/timesyncd.conf.xml index 3fd11cea04..07472cdb39 100644 --- a/man/timesyncd.conf.xml +++ b/man/timesyncd.conf.xml @@ -103,6 +103,18 @@ Defaults to 30 seconds and must not be smaller than 1 second.</para></listitem> </varlistentry> + <varlistentry> + <term><varname>SaveIntervalSec=</varname></term> + <listitem><para>The interval at which the current time is periodically saved to disk, in the absence + of any recent synchronisation from an NTP server. This is especially useful for offline systems + with no local RTC, as it will guarantee that the system clock remains roughly monotonic across + reboots.</para> + + <para>Takes a time interval value. The default unit is seconds, but other units may be specified, see + <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>5</manvolnum></citerefentry>. + Defaults to 60 seconds.</para></listitem> + </varlistentry> + </variablelist> </refsect1> |