[SR-Users] Green VoIP - energy efficiency and performaces of v3.0

[Jeremya]

I should point out that my SIP business is risk-of-life voice services
where I have to arrange to power SIP devices and communications devices
from alternate energy sources for extended periods, so I am intimately
aware of every watt that is used in SIP communications.

My systems use kamailio in embedded servers at very low power. My
constraint is the SIP devices and communications devices that suck up an
order of magnitude more power at each small site - of which I have many.

Jeremya wrote:
> 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.
>
>
> Daniel-Constantin Mierla wrote:
>   
>> Hello,
>>
>> Jan Janak conducted a very interesting research project regarding
>> energy efficiency of VoIP systems during 2010, a collaboration between
>> iptel.org and Columbia University.
>>
>> The team used the source code from sip-router.org GIT repository from
>> January 2010, which corresponds to Kamailio (former OpenSER) and SER
>> v3.0. The latest stable series v3.1 shares the same internal
>> architecture with v3.0.
>>
>> As part of the research work, Jan could also gather some figures about
>> capacity and performances of v3.0 with a quite complex configuration
>> file: etc/sip-router-oob.cfg (involving authentication and NAT
>> traversal as well).
>>
>> You can read the paper about energy efficiency at:
>>
>> - Green VoIP Article: http://asipto.com/u/2j
>>
>> The draft notes about capacity and performances of v3.0 are available at:
>>
>> - Performances and Capacity for v3.0 Wiki page: http://asipto.com/u/2k
>>
>> Some interesting results:
>>
>> - one instance of SIP server with 500 000 online users (mixed users –
>> behind and not NAT routers) – consumed energy 210W
>> - one instance of SIP server with 1 000 000 online users (no NAT
>> involved) – consumed energy 190W
>> - on a 32-bit machine with 4GB of memory and with 2.5GB reserved for
>> SIP server, the server could support 43 000 simultaneous TLS
>> connections – consumed energy 203W
>> - one SIP server instance with 80 000 permanent TCP connections, the
>> SIP server could still handle at least 1000 requests per second and a
>> connection arrival rate of 1000 new connections per second, done for
>> 20 000 new connections. CPU load generated by the SIP server was from
>> 6% to 8%.
>>
>> I added a new section to the draft notes to list the enhancements done
>> for the latest stable release (v3.1.x) that contribute to performance
>> improvements, like asynchronous TLS, fine tuning of memory for TLS
>> connections and raw UDP sockets.
>>
>> Cheers,
>> Daniel
>>
>>     
>
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>   

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sip-router.org/pipermail/sr-users/attachments/20110525/93bd9114/attachment-0001.htm>