On 8/21/18 23:50, Colin Watson wrote: > On Tue, Aug 21, 2018 at 11:38:35PM +0200, Michael Biebl wrote: >> On Fri, 17 Mar 2017 12:59:33 +0100 cgzones <cgzo...@googlemail.com> wrote: >>> Package: man-db >>> Version: 2.7.6.1-2 >>> >>> Dear Maintainer, >>> can you please add a systemd timer for the daily man-db cache regeneration. >> >> Did you have time to look at this patch? > > Can somebody explain what it achieves, other than churn? cron still > works just fine on systemd-based systems ...
cron still works fine, but we are at a point (in Debian) where I see enough packages shipping a systemd.timer alongside their cron job, that installing cron by default could no longer be necessary. man-db is one of the remaining, by default-installed, packages, which doesn't yet. Aside from having one less package to install and daemon to run, a systemd.timer gives you much more possibilities and fine-grained control about the execution of the task (take a look at the recently added logrotate.timer/.service) Persistent systemd timers also handle cases where a system is not 24/7 online much nicer (anacron imho is just a clutch in comparison) One aspect of shipping a native systemd .service + .timer I value particulary, is that with a persistent journal, I can very easily check when a particular timer and its associated service were executed. e.g. journalctl -u apt-daily.service - Logs begin at Tue 2017-09-12 10:33:20 CEST, end at Wed 2018-08-22 00:36:53 CEST. -- Jul 06 08:46:09 pluto systemd[1]: Starting Daily apt download activities... Jul 06 08:46:11 pluto systemd[1]: Started Daily apt download activities. -- Reboot -- Jul 07 00:31:29 pluto systemd[1]: Starting Daily apt download activities... Jul 07 00:31:29 pluto systemd[1]: Started Daily apt download activities. Jul 07 11:25:19 pluto systemd[1]: Starting Daily apt download activities... Jul 07 11:25:20 pluto nm-online[25227]: ../../../../gio/gdbusobjectmanagerclient.c:1589: Processing InterfaceRemoved signal for path /org/freedesktop/Netw Jul 07 11:25:20 pluto nm-online[25227]: ../../../../gio/gdbusobjectmanagerclient.c:1589: Processing InterfaceRemoved signal for path /org/freedesktop/Netw Jul 07 11:25:21 pluto systemd[1]: Started Daily apt download activities. -- Reboot -- Jul 08 02:58:30 pluto systemd[1]: Starting Daily apt download activities... Jul 08 02:58:33 pluto systemd[1]: Started Daily apt download activities. Jul 08 10:06:55 pluto systemd[1]: Starting Daily apt download activities... Jul 08 10:06:56 pluto systemd[1]: Started Daily apt download activities. ... Regards, Michael -- Why is it that all of the instruments seeking intelligent life in the universe are pointed away from Earth?
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