[systemd-devel] Keeping track of usage time

Dimitri John Ledkov dimitri.j.ledkov at intel.com
Tue Nov 3 04:20:25 PST 2015

On 3 November 2015 at 06:27, Umut Tezduyar Lindskog <umut at tezduyar.com> wrote:
> journalctl --list-boots seems great actually but wouldn't work for us.
> We cannot keep lots of logs in our products.

You shouldn't need to keep lots of logs, just a timer unit that would
query and store/transmit the bootids/deltas (possibly in a round-robin



> Ultimately we are trying to answer the question of how long one of our
> product has been in use.
> We will implement it with a .timer/.service which periodically adds
> /proc/uptime to a file and the file gets preserved over reboot.
> Umut
> On Mon, Nov 2, 2015 at 7:00 PM, Lennart Poettering
> <lennart at poettering.net> wrote:
>> On Mon, 02.11.15 15:46, Umut Tezduyar Lindskog (umut at tezduyar.com) wrote:
>>> Hi,
>>> We would like to implement a feature to keep track of accumulated
>>> values of uptimes in our products. Tracked time will give us the total
>>> usage time of our product not just since last reboot (/proc/uptime).
>>> Is upstream interested in having such implementation?
>> As Dimitri suggested: wouldn't a journalctl --list-boots invocation
>> suffice for this?
>> Or do you need this per-service? (where the journal should be able to
>> provide you with the answer too, of course, but with a different line)
>> Lennart
>> --
>> Lennart Poettering, Red Hat
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