On Wednesday 09 April 2014, Thomas Bächler wrote: > Am 09.04.2014 14:12, schrieb Ruediger Meier: > >> well, "fstrim -a" contains heruistic to select the right filestems > >> (it really does not call trim for all devices), it has been > >> implemented to *avoid* sysadmins creativity. If you don't like it, > >> you can use "fstrim <device>" (for example from crontab). > > > > I'd like the documentation more detailed. > > Does it really run on all mounts or only /etc/fstab? > > Does it write on automounted devices which are probably not owned > > by the admin? Does it affect read-only mounts? > > The documentation is precise here: > > 'Trim all mounted filesystems on devices that support the discard > operation.' If this is 100% true then Karel's statement 10 lines above would be wrong. Also this doc line indicates that even read-only mounts could be trimmed (if FS supports it) which would be at least dangerous if it runs automatically while admin is trying to repair a broken filesystem. > It says exactly what it will do. Every one of your questions is > answered. > > IMO the task itself is already installed since we have fstrim's > > option -a". You just need to _enable_ it to run whenever you want > > for example by using crontab. That's trivial. > > Because it takes time. I have done it four times already and it cost > me several minutes each time. Now nobody has to do it again. > > Nobody would have thought about adding a 1-liner cronjob file to > > util-linux eventhough any distro has /etc/cron.daily/. But now > > systemd timer? Thats what I don't understand. > > I don't know why nobody thought about doing that in the past, maybe > nobody cared about the needs of all those other admins. Maybe because > installing a file into cron.daily automatically enables it. Maybe > because nobody cared about anything but his own system? I guess because adding one crontab line is trivial in comparision to add two files plus symlinks to get such systemd timer running. > > If _creating_ a systemd timer is too complicated for today's admins > > It is not complicated, it is just a task that shouldn't be repeated > countless times. Now you still need to enable it "countless times" which I would do using rsync or git anyway like I would sync self created timers, crontabs or whatever config files with same effort. cu, Rudi -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
