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  1. #1
    WHT-BR Top Member
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    eBay: US$ 300 / servidor em energia elétrica

    Em 2012, o eBay gastou em média US$ 300 em energia elétrica para alimentar cada um dos 50+ mil servidores da empresa.

    Em março desse ano, passou a publicar dados de eficiência da infraestrutura e dos negócios. Por exemplo, em 2012 cada servidor contribuiu com quase US$ 120 mil dolares do faturamento anual e cada MWH gasto gerou US$ 38 milhões de receita provendo serviços para um total de 112 milhões de usuários com dispêndio médio de US$ 54 / ano.

    Digital Service Efficiency: DSE Dashboard | DSE


    With its Digital Service Efficiency (DSE) tool, eBay revealed just how truly efficient its infrastructure is across a variety of metrics. The company has now hit its first full quarter of public data that measures how the company performed against its own goals.

    In March, eBay launched its Digital Service Efficiency (DSE) methodology – a “miles per gallon” equivalent that displayed infrastructure effectiveness in real-time across 4 key business priorities: performance, cost, environmental impact and revenue.

    Among Q1 highlights, the company raised the number of transactions per kilowatt-hour and it exceeded its cost per transaction goal. Despite increasing its number of servers powering eBay.com, there was an increase of only 16 percent (2.69 MW) in power consumption, which the company contributes to the efficiency of new servers.

    There were also improvements across performance, cost, and environmental impact. In terms of environmental impact, a big boost came from the company’s Salt Lake City data center’s solar array, increasing the company’s clean energy use. While the solar array is small, it increased owned clean energy powering eBay.com by 0.17 percent, and there’s a fuel cell installation expected to come online this summer.

    The company’s goals were:

    • Increase transactions per kWh by 10 percent transactions per kWh increased 18 percent year over year)

    • Reduce cost per transaction by 10 percent cost per transaction decreased 23 percent in Q1 alone, exceeding the initial goal

    • Reduce carbon per transaction by 10 percent carbon per transaction showed a net decrease of 7 percent; this was the only metric the company didn’t blow past. There’s its Utah Bloom fuel cell installation that will go live this summer, which will decrease and contribute significantly to the 10% carbon reduction goal set for the year. The company is confident it will remain on track to hitting this goal, recognizing that infrastructure is dynamic and changes.

    Some of these positive trends were driven by newer, smarter features on the site including feed technology rolled out last fall. The feed technology attempts to personalize the shopping experience by showing auctions that might be of interest based on a user’s history.

    Also important to note is that the company fine-tuned the methodology. It now only looks at server pools that receive external web traffic so it can measure “buy and “sell” traffic, calling all other server pools not receiving external web traffic “shared”.

    The company said it was making $337 million per megawatt last time around, but this metric has been fine tuned to measure Revenue per megawatt hour now to represent total consumption per quarter and year rather than quarterly averages.

    The auction giant had 52,075 servers then, which is up to 54,011 servers now. It was consuming 18 megawatts of power to support 112.3 million active users; now it consumes 19.08MW for 116.2m active users. Next quarter will paint a clearer picture of revenue per user, as on a Q/Q basis it seems to have dropped $1 from $15 to $14. For last year, the company showed revenue of $54 per user, and $117,000 per server.

    DSE provides a vivid example of the productivity of data center infrastructure, which typically has construction costs of $5 million to $10 million per megawatt for large users like eBay. All the information is publicly available at dse.ebay.com
    The eBay Dashboard Shows Company Performance
    Última edição por 5ms; 29-05-2013 às 22:59.

  2. #2
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    Carinho, as máquinas sao famintas...

  3. #3
    WHT-BR Top Member
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    Citação Postado originalmente por cresci Ver Post
    Carinho, as máquinas sao famintas...
    Estou tentando entender as contas.

    Não fecha faturamento (US$ 6 bi) / MW (18)

    Se cada servidor fatura US$ 120 mil por ano, US$ 300 de energia está de bom tamanho.

    Essa informação dos US$ 300 por máquina foi dada por Matt Eastwood, IDC (Twitter ‏@matteastwood )

  4. #4
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    US$ 25/mês dá 2A/máquina num cenário de $12.50/A@120V

  5. #5
    WHT-BR Top Member
    Data de Ingresso
    Dec 2010
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    Parece que é por aí mesmo ...

    Carga 19MW

    54 mil servidores

    Rateio da carga total entre servidores

    350W / servidor (10 centavos o KWh = US$ 25/mes)

    Descontando PUE 1.59

    Rateando servidores + equip. rede

    220W / servidor

    1A @220V 2A @ 120V
    Última edição por 5ms; 30-05-2013 às 00:09.

  6. #6
    WHT-BR Top Member
    Data de Ingresso
    Dec 2010
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    Citação Postado originalmente por 5ms Ver Post
    cada MWH gasto gerou US$ 38 milhões de receita
    A unidade do Dashboard está incorreta.

    Cada MWH de energia consumida representou US$ 38 mil da receita do eBay.

    Na média anual, o eBay fatura US$ 700 mil por hora.

    700.000x24hx365d
    Última edição por 5ms; 30-05-2013 às 00:48.

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