Unterschriftensammlung im Google-Zeitalter

Samstag Nov 03, 2007

13949712720901ForOSX - die einfachste Möglichkeit, das Mitmachweb zum Unterschriftensammeln zu benutzen. In diesem Fall für die Petition, Java 6 in Max OS X "Leopard" zu unterstützen.

88 Hits bis jetzt...

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Posted at 09:18PM Nov 03, 2007 by rolfk in Sun Stuff
Tags: web20

Grüner Surfen - Update

Samstag Okt 27, 2007

Wieviel Ressourcenverbrauch verursacht denn nun das Surfen im Internet? Und wie kann dieser Verbrauch erstens transparent gemacht und zweitens reduziert werden? Das war das Thema der Fachtagung „Grüner Surfen“ im Bundesumweltministerium in Berlin.

Einen umfassenden Bereicht gibt es bei heise Technology Review.
Oder Interviews zum Anhören beim Deutschlandfunk.
Meine Präsentation kann hier als PDF heruntergeladen werden.

Update 08.11.2007: Die EU-Studie "Energy Efficient Servers in Europe - Part I: Energy Consumption and Saving Potentials" kann hier heruntergeladen werden.

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Posted at 05:41PM Okt 27, 2007 by rolfk in Eco
Tags: eco internet web20

Meine Präsentation von der Sustainable IT Konferenz, Berlin - Update

Montag Okt 15, 2007

Am 17. Oktober halte ich anläßlich der "Sustainable IT Konferenz" in der Kalkscheune Berlin eine Präsentation zum Thema "Zur CO2 Bilanz des Internet". Es handelt sich um eine verkürzte und aktualisierte Fassung der EBAY Entwicklerkonferenz Präsentation.

Präsentation zum Download: ODF (10MByte), PDF (5MByte)


Update:

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Posted at 11:47PM Okt 15, 2007 by rolfk in Eco
Tags: eco internet web20

Als "Green IT"-Gastblogger bei Innovativ-In

Mittwoch Aug 15, 2007

Durch die Sun EcoTour auf uns aufmerksam geworden, hat Elita Wiegand mich eingeladen, eine Reihe von Gastblogs zum Thema "Green IT" auf ihrer Innovativ-In Plattform zu posten. Hier die Links zu meinen fünf Postings:

• Teil 1: Das Mitmachweb und der Klimawandel
• Teil 2: 1.000.000.000$ Stromrechnung - eine gute Nachricht für das Klima
• Teil 3: Leichter leben mit der Smart Card
• Teil 4: Ran an den Strom
• Teil 5: Wie vermarktet man Green IT?

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Posted at 08:11PM Aug 15, 2007 by rolfk in Eco
Tags: co2 eco ecotour energie internet sunray web20

Eco-friendly Webhosting

Montag Jul 30, 2007

Since a dedicated server easily draws 5000 KWh electrical energy for power and cooling, which is (at least for the german energy mix) equivalent to four tons of carbon dioxide emissions, everybody should have a second thought on how much CO2 his or her web presence produces.

Just like Car Pooling, shared webhosting can save a lot of energy. But if we share a server with somebody else, how can we find out how many nighbours we have to calculate our carbon footprint? The answer: http://www.myipneighbors.com/

Let's see:

• www.systemhelden.com seems to live on a decicated server, since it is sharing its IP address with www.systemhelden.de only. But: systemhelden.com is running on a Solaris Container, so we are not using a physical server here.
• One Shared Domain at Strato (that according to Strato only consumes just 1KWh per year) shares the IP address with 700-800 other domains. Combine that with many IP adresses configured in one server, and you get many thousand domains served from one server alone.
• Our Sun EcoTour Blog shares the server with 17 other domains. Not bad. We just have to make sure to buy enough CO2 neutral energy to feed the Sun EcoRider and the web page.

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Posted at 11:12AM Jul 30, 2007 by rolfk in Eco
Tags: eco ecorider ecotour web20

Your CO2 footprint when using the internet

Freitag Mai 04, 2007

How much CO2 does a Google Search produce? Servers need electrical power. According to recent studies, all servers in the US accounted for more than 1.2% of the nationwide annual electrical power consumption, more than all TV sets combined. And, according to Netcraft, the number of internet hosts has doubled since then.

The majority of electrical power is created by burning fossil fuels like coal, gas or oil, producing carbon dioxide CO2 ad global warming. So how much CO2 does one Google search produce? One EBAY auction or a SecondLife avatar? Or one blog on blogs.sun.com?

For a keynote at the german EBAY developer's conference I calculated the following numbers and compared them to the CO2 emission of a Toyota Prius hybrid car and a human being:

My calculations and the sources for the number of servers etc. can be found in my presentation (in german language, but the numbers should speak for themselves). Download ODF here or PDF here. Or view online the Flash presentation (created with StarOffice Flas Export) below:

As an example, this is how I calculated the surpisingly high blog post on blogs.sun.com number:

We are hosting 66183 blogs in 3 years, running on two T2000 (the best servers you can get when it comes to power efficiency).

A pair of Sun Fire T2000 servers draws 2*320Watts. Double that number for cooling and infrastructure, so you need 33628KWh in three years. That's 0.5KWh for every blog! One KWh electral power created in a coal power plant creates 1700 grams of CO2 - so the global warming effect of this blog is comparable to a runner running 21 kilometers (or sitting in front of his computer for one whole day).

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Posted at 08:29PM Mai 04, 2007 by rolfk in Eco
Tags: eco web20