On Thu, 12 May 2011, Don Tucker wrote:
> Jim, you're right, it probably isn't needed. I just thought that it might be
> helpful during the prototype phase where we will be testing the system running
> for long durations without direct observation. I'll defer to your experience,
> though. I would like to avoid unnecessary use of the SD card.
>
> My motivation for dialing down the time is that a user may toggle a power
> switch on the system, and they will need to wait until everything cleanly
> shuts down before actual power is cycled. I just realized that if they turn
> the toggle the switch in the middle of the system booting, they will need to
> wait for that boot time as well (typically 70-80 seconds)! Does anyone know
> what to look into to shorten the boot time? There's a lot more that goes on
> before the scripts in rc2.d start running.
Check the /etc/inittab file, it will tell you what script gets executed
after init ( process 1 sharted by the kernel ) has done the other stuff in
inittab. I think it is /etc/init.d/rcS , which just runs the scripts linked
in directory /etc/rcS.d
But something like
echo "Running rcS.d ....."
in the beginning of /etc/init.d/rcS . That will give you an idea of how
long it takes for the kernel to load and initialise and ditto for init .
A lot of the stuuf in rcS.d is generalised by Debian so the OS works on
lots of stuff, servers/laptops/desktops etc, so there is loads of stuff in
there that will not be needed.
Is there a specific reason you are using the Debian Image? The TSimage is a
lot leaner.
>
> On 5/12/2011 1:08 PM, Jim Jackson wrote:
> >
> >
> >
> > On Thu, 12 May 2011, Don Tucker wrote:
> >
> > > Well, after timing each of the steps at shutdown, most steps take a
> > > second or less. Shutting down apache only takes 2-3 seconds, so I don't
> > > really buy much from turning that daemon off. The big time sinks are (1)
> > > stopping rsyslogd (~14 seconds),
> >
> > Do you need it? Do you need the syslog messages? It may be luxery you can
> > do without. Unless I need it for debugging during development I think use
> > of syslogd with flash memory is something best avoided.
> >
>
>
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