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Author: Didier Kryn
Date:  
To: dng
Subject: Re: [DNG] Detailed technical treatise of systemd
Le 09/11/2015 15:58, Rainer Weikusat a écrit :
> Didier Kryn <kryn@???> writes:
>
> [...]
>
>>>> Maybe you never shutdown, but some, like me, prefer to put their
>>>> laptop back in a well-know state from time to time.
>>> Indeed, I do reboot from time to time. Sometimes it's because I
>>> didn't keep an eye on battery state - it's getting towards the end of
>>> it's life and I can no longer rely on the "low battery warning,
>>> followed a while later by a forced sleep and suspend to disk" that
>>> happens with a healthy battery. More often it's to clear memory -
>>> something seems to have a leak, and I'm not that convinced OS X
>>> memory management is all that good.  But normally, I just use sleep
>>> mode.
>>      When I was testing a static build of vdev, I used to reboot my
>> laptop several times per hour, alternatively to Debian Wheezy and to a
>> minimalistic OS on a USB stick, containing essentially vdev and
>> busybox. Reboot time is around 30s, yet it's still irritating.

>>
>>      Bios + Grub + kernel startup take by far the biggest part, but I
>> think there's room for progress on these.
> "To a degree": The three things wich take longest when booting my
> workstation are

>
>     - boot the kernel
>          - get an address via DHCP
>          - set the time via NTP

>

     - boot the kernel: agreed.
     - DHCP: use static config if your DHCP server is slow. This can be 
done at home, and often also at work.
     - NTP: if you have a working RTC onboard, you've got hours before a 
time drift is detectable.  I don't know of any service explicitely 
depending on NTP.


     Didier