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5 the plan from that offset the worsening of the crisisThe challenge was architectural and logisticalUnder penalty it will compel such listed company to provide critical market informationAttention also sensitivity indicated in ISOObviously some have difficulty understanding he toldThe commune of Ixelles and its inhabitants 77As the companies to pay dividends to each otherSince 2006 he receives a pension hat of 583But a page is turned on the twodigit growthDo not search for his personal collectionClear glance, our interlocutor is a also tie that green IBM. Jean-Michel Rodriguez is "senior IT architect", but especially "energy efficiency leader" in the centre of product support and solutions (PSSC) of Montpellier. This is where did us visit his "green data center", the showcase for the world of the green computing from IBM expertise. So a "data center" to be green, it must first be self-imposed it permanently, to where passes the lower watt. Which implies the measure in real time of the power consumption of each important link of the device. All recent catalogue of IBM storage devices and servers are able to provide this information. Just as the latest air conditioning units. For the rest, it is possible to use for IPDUS ("intelligent power distribution units"), a sort of multiple outlets able to measure and transmit the power consumption of devices connected on. The data thus collected should be collected, consolidated, integrated and visualized using ad hoc software. At IBM, is Tivoli. Give him some plasma screens and you get pretty graphs to know at any moment where are all these kilowatt hours that lead the electricity bill. And the planet.
Second aspect: he must hunt down the heat. On the giant screens of the control of the centre of Montpellier room, giving him a small side Nasa, a thermal map of "data center", appears on several levels. In the same way, technicians can also display the relative humidity and pressure in the room. The information comes from a network of 87 probes equipped with sensors, distributed on the 70 square metres of the computer room sending their data by Wi - Fi.
Compartmentalized areas
Third aspect: the "green data center" is compartmentalized. A "low density" zone is home to "mainframe" type machines, known for their low heat release. A "high density" zone hosts machines much warmer, type "blades". The electric consumptions go hand in hand: the first consume 1.5 kW per square metre when the second suck 12 kW per square meter. Where appropriate, an intermediate zone could shelter machines characterized by densities of the order of 5 kW per square meter. To avoid energy losses, technicians have used all the tricks. Thus, curtains into strips of plastic, as seen in refrigerated warehouses, separate watertight way aft of the machines, where air is about 45 degrees of their front, where must be sucked air at 20 degrees about this air chilled from the air conditioning system, via the false floor. Moreover, iDataplex server increases the likelihood of cool dense equipment with a door chilled by a circuit of water.
This "green data center", which consumes 200 kW, would display a PUE (power usage effectiveness") enviable of 1.85. This indicator, to consume with moderation because it does not say everything, measure the ratio of the total electrical power consumed by a center of computer equipment such says. The current average is between 2.5 and 3. This means that each computer watt would require 1.5 to 2 W of equipment, starting with air conditioning.
The "green data center" IBM must move at the speed greater than March 1, 2009. Its surface to double to 140 square metres and experiment including new water cooling solutions.
