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Hello Henning,<br>
<br>
My application is slightly different in that I have hundreds of nodes
each running an instance of Kamailio on embedded servers in a failure
tolerant configuration. This is in a risk-of-life application and each
node has large backup power supplies.<br>
<br>
In reality kamailio takes milliwatts of the total load. What sucks
power at each node is the SIP devices, switches, and the CISCO routers
foisted on me by the client.<br>
As an engineer (? I guess I am?) The boring stuff becomes important so
total power draw and life after power failure is very important.
Without the power hungry devices my kamailio systems can stay up for
weeks after power loss. With the SIP devices and routers I'm limited to
hours of uptime.<br>
<br>
Henning Westerholt wrote:
<blockquote cite="mid:201105251302.23772.henning.westerholt@1und1.de"
type="cite">
<pre wrap="">On Wednesday 25 May 2011, Jeremya wrote:
</pre>
<blockquote type="cite">
<pre wrap="">These figures pale into insignificance compared to the power required
for standard SIP devices - typically 5-8 watts per device multiplied by
the number of devices.
When you factor in Gigabit Ethernet the power ups significantly.
Optimisation at the server level is not significant on any scale.
Optimisation on communications power: i.e. end-devices, DSL & switches
is where the power savings are important.
</pre>
</blockquote>
<pre wrap=""><!---->
Hi Jeremya,
you're right in this case - given the much higher number of CPE devices in the
end user hands and especially as most of them use really cheap (also bad)
power supplies. But in generally optimisations on a server level are also
important, if you have a few thousand servers than even small amounts fast add
up. And for the whole internet it already uses siginifcant part of the power,
close to 10% in the US to some research:
<a class="moz-txt-link-freetext" href="http://hardware.slashdot.org/story/07/09/27/2157230/Internet-Uses-94-of">http://hardware.slashdot.org/story/07/09/27/2157230/Internet-Uses-94-of</a>-
Electricity-In-the-US
With regards to the research from Jan, the performance numbers are really
impressive, great work!
Cheers,
Henning
</pre>
</blockquote>
<br>
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