DCN October 2016 - Page 26

green IT A TOOL FOR ITS TIME The success of PUE showed that the data centre industry was hungry for a tool to measure efficiency – now The Green Grid’s new Performance Indicator (PI) has the potential to further transform the industry and our increasingly connected society, as Mark Seymour of Future Facilities explains. T he introduction of the Power Usage Efficiency (PUE) ratio in 2006, by The Green Grid, transformed the way data centres were perceived within and outside the industry. While it took some time to gain currency, in recent years an increasing focus on energy usage has led to almost every new data centre promoting their PUE score as a badge of efficiency and a demonstration of their green credentials. It started the trend but has received its fair share of criticism and it didn’t tell the whole story. These are examples at the extremes of the spectrum of data centres, where measuring PUE would give vastly different results and, in the case of the investment bank exam Α±”°΅₯‘Ё•Ω•Έ‰”)₯ΙΙ•±•Ω…ΉΠ₯Έέ‘…Ёё•δ…Ι”ΡΙε₯Ήœ)ΡΌ…‘₯•Ω”ΈQ‘•ΈΡ‘•Ι”…Ι”…±°Ρ‘”)‘…Ρ„•ΉΡΙ”…ΑΑ±₯…Ρ₯½ΉΜ₯Έ‰•Ρέ••Έ°)έ‘•Ι”AU₯́₯΅Α½ΙΡ…ΉΠΡΌΩ…Ιε₯Ήœ)‘•Ι••ΜΈ%Ё₯́ΉΌ±½Ή•ΘΝΥ™™₯₯•ΉΠ)Ν₯΅Α±δΡΌ΅•…ΝΥΙ”•Ή•Ιδ•™™₯₯•ΉδΈ)=Ρ‘•Θ΅•ΡΙ₯Μ…Ι”Ι•ΕΥ₯Ι•Ρ‘…Π)½ΉΝ₯‘•Θ‰½Ρ Ρ‘”Ι½±”…ΉΡ‘”)•™™•Ρ₯Ω•Ή•Ν́½˜„‘…Ρ„•ΉΡΙ”Έ()•Ν₯Ή₯Ήœ…ΉΙΥΉΉ₯ΉœΡ‘”)‘…Ρ„•ΉΡɕ́½˜Ρ‘”™ΥΡΥΙ”()]‘₯±”AUΝ‘½έ•Ρ‘•Ι”έ…́„)ΝΡΙ½Ήœ…ΑΑ•Ρ₯Ρ”έ₯Ρ‘₯ΈΡ‘”Ν•Ρ½Θ™½Θ)…Έ₯Ή‘•Α•Ή‘•ΉΠ΅•…ΝΥΙ•΅•ΉΠΡ½½°°)Q‘”Ι••ΈΙ₯“ŠéΉ•άA•Ι™½Ι΅…Ή”)%Ή‘₯…Ρ½Θ€‘A$€Ρ…­•ΜΡ‘”™½ΥΉ‘…Ρ₯½Έ)•ΝΡ…‰±₯Ν‘•‰δAU…Ή‰Υ₯±‘́ΥΑ½Έ₯Π)ΡΌ‘•±₯ٕȁ„Ρ½½°Ρ‘…Ё₯́₯Ή‘₯ΝΑ•ΉΝ…‰±”)™½Θ‘…Ρ„•ΉΡɕ́…Ι½ΥΉΡ‘”±½‰”Έ)Q‘”Ή•άΡ½½°™½Ύ͕½ΈΡ‘Ι•”)•±•΅•ΉΡΜΈQ‘”™₯ΙΝΠ°AU°™½ΥΝ•Μ)½Έ•Ή•Ιδ•™™₯₯•Ήδ°±½½­₯Ήœ…Ё‘½ά)•™™•Ρ₯Ω•±δΡ‘”™…₯±₯Ρδ₯́½Α•Ι…Ρ₯Ήœ)₯ΈΙ•±…Ρ₯½ΈΡΌ‘•™₯Ή••Ή•Ιδ)•™™₯₯•ΉδΙ…Ρ₯ΉΜΈAUΙ•΅…₯ΉΜ„)­•δ½΅Α½Ή•ΉΠ₯ΈΡ‘”Ή•άΡ½½°°)…±±½έ₯Ήœ™…₯±₯Ρ₯•ΜΡΌ΅•…ΝΥΙ”Ρ‘•₯Θ)Ι••ΈΙ•‘•ΉΡ₯…±Μ…Ή‘•΅½ΉΝΡΙ…Ρ”)₯΅ΑΙ½Ω•΅•ΉΡ́₯ΈΑ•Ι™½Ι΅…Ή”Έ()…Ρ„•ΉΡɕ́Ή••ΡΌ‰”Ή½Π½Ή±δ)•Ή•Ιδ•™™₯₯•ΉΠ°‰ΥЁ…±ΝΌ•™™•Ρ₯Ω”)₯Έ½½±₯Ήœ‘ΥΙ₯ΉœΉ½Ι΅…°½Α•Ι…Ρ₯Ήœ)½Ή‘₯Ρ₯½ΉΜ…Ή‘•Ν₯Ή•™½Θ™…₯±ΥΙ”)½Θ΅…₯ΉΡ•Ή…Ή”Ν•Ή…Ι₯½ΜΈ…Ρ„)•ΉΡɕ́½΅”₯Έ΅…Ήδ‘₯™™•Ι•ΉΠ)Ν‘…Α•Μ…ΉΝ₯ι•ΜΡ½ΌΈ‘…Ρ„•ΉΡΙ”)™½Θ…Έ₯ΉΩ•ΝΡ΅•ΉΠ‰…Ή¬™½Θ•α…΅Α±”)΅₯‘Ё™½ΙΌ•™™₯₯•ΉδΡΌ‘•±₯ٕȁ™…ΝΡ•Θ)ΡΙ…ΉΝ…Ρ₯½ΉΜΈ=ΈΡ‘”½Ρ‘•Θ‘…Ή°)Ρ‘½Ν”‘•…±₯Ήœέ₯Ρ ±…ɝ”Ω½±Υ΅•Μ½˜)ΥΝ•Ί½ΈΡ‘”έ•ˆ•Ω•Ι䁑…δέ½Υ±)™½Ύ½Έ•™™₯₯•Ήδ‰•…ΥΝ”½˜Ρ‘”)΅…Ή₯ΡΥ‘”½˜½ΉΝΥ΅ΑΡ₯½Έ°Ρ½±•Ι…Ρ₯Ήœ)Ν΅…±°‘•±…έ₯Έ™…Ω½Υȁ½˜Α½Ρ•ΉΡ₯…±±δ)΅…ΝΝ₯Ω”•Ή•ΙδΝ…Ω₯ΉΜΈ(ΘΨ() Υ₯±‘₯Ήœ½ΈΡ‘”™½ΥΉ‘…Ρ₯½ΉΜ)½˜AU()Q‘”Ν•½Ή°%PQ‘•Ι΅…°) ½Ή™½Ι΅…Ή”°•α…΅₯Ή•Μ‘½ά΅Υ )½˜Ρ‘”‘…Ρ„•ΉΡΙ—Šé%P•ΕΥ₯Α΅•ΉΠ)₯́½Α•Ι…Ρ₯Ήœ…Ёɕ½΅΅•Ή‘•₯Ή±•Π)…₯ȁѕ΅Α•Ι…ΡΥɕ́‘ΥΙ₯ΉœΉ½Ι΅…°)½Α•Ι…Ρ₯½ΈΈQ‘”Ι…Ρ₯Ό‘•±Άչ‘•ΙΝΡ…Ή)‘½ά΅Υ °₯˜…Ήδ°%P•ΕΥ₯Α΅•ΉΠ₯Μ)½Α•Ι…Ρ₯Ήœέ₯Ρ ₯ΉΙ•…Ν•Ι₯Ν¬½ΥΡΝ₯‘”)Ι•½΅΅•Ή‘•Ι…Ή•ΜΈ)₯Ή…±±δ°%PQ‘•Ι΅…°I•Ν₯±₯•Ή”)΅•…ΝΥɕ́ё”•ΕΥ₯Α΅•ΉΠ…ЁΙ₯Ν¬½˜)½Ω•Ι‘•…Ρ₯Ήœ₯ΈΡ‘”…Ν”½˜„½½±₯Ήœ)™…₯±ΥΙ”½Θ‘ΥΙ₯ΉœΑ±…ΉΉ•΅…₯ΉΡ•Ή…Ή”Έ)%Ё₯́ё₯́™₯Ή…°΅•ΡΙ₯ŒΡ‘…Ё…±±½έΜ)™…₯±₯Ρ䁡…Ή…•ΊѼΥΉ‘•ΙΝΡ…Ή‘½ά)Ρ‘•₯ȁ‘…Ρ„•ΉΡΙ”έ₯±°‰•‘…Ω”έ‘•Έ)Ι•‘ΥΉ‘…ΉΠ½½±₯ΉœΝεΝΡ•΅Μ…Ι”Ή½Π)½Α•Ι…Ρ₯Ήœ€‘₯”Έ8½ΥЁ½˜8­`ΥΉ₯Ρ́…Ι”)½Α•Ι…Ρ₯Ήœ€ΈQ‘₯́…Έ‰”‘½Ή”•₯Ρ‘•Θ)ёɽ՝ ΅•…ΝΥΙ•΅•ΉΠƒŠLέ‘•Έ½½±₯Ήœ)ΝεΝΡ•΅Μ…Ι”½™˜½ΘΥΉ‘•Θ΅…₯ΉΡ•Ή…Ή”+ŠL½Θ΅½Ι”•™™•Ρ₯Ω•±δ…ΉΝ…™•±δ)ёɽ՝ Ρ‘”ΥΝ”½˜Ν₯΅Υ±…Ρ₯½ΈΝ½™Ρέ…Ι”Έ)Q‘”Ι•…Ν½Έ™½Θ½ΉΝ₯‘•Ι₯Ήœ…±°Ρ‘Ι•”)΅•ΡΙ₯ΜΝ₯΅Υ±Ρ…Ή•½ΥΝ±δ₯́ё…Ё„Α½Ν₯Ρ₯Ω”)‘…Ή”™½Θ½Ή”΅…δΙ•ΝձЁ₯Έ„Ή•…Ρ₯Ω”)‘…Ή”™½Θ…Ή½Ρ‘•ΘΈMΌ₯Ё₯́₯΅Α•Ι…Ρ₯Ω”)Ρ‘…Ёё”‰ΥΝ₯Ή•Ν͕́Ρ́„Ρ…ɝ•Π™½Θ)•… ₯Έ½Ι‘•ΘΡΌ‰”…‰±”ΡΌΑΙ₯½Ι₯Ρ₯Ν”)‘•₯Ν₯½ΉΜΡ‘…Ё΅…α₯΅₯Ν”Ρ‘”Ω…±Υ”½˜)Ρ‘•₯ȁ₯ΉΩ•ΝΡ΅•ΉΠ™½ΘΡ‘”‰ΥΝ₯Ή•ΝΜΈ()Q‘”Ι₯Ρ₯…°Ω…±Υ”½˜A$)Q‘•Ι”…Ι”™½Υȁ±•Ω•±Μ½˜A$°Ι…Ή₯Ήœ)™Ι½΄Ρ‘”‰…Ν₯Œ΅•…ΝΥΙ•…ΝΝ•ΝΝ΅•ΉΠ)½˜Ρ‘”ΥΙΙ•ΉΠΝΡ…Ρ”½˜Ρ‘”‘…Ρ„((0