Office 2007 Serial Disk power-management is on Mic

Microsoft has been turning up the volume on its green initiatives across the company, as of late. I lately stumbled onto yet an additional one: DiskEnergy.DiskEnergy is actually a Microsoft Research challenge headquartered at the firm;s Cambridge, U.K. analysis facility. Thus far, there;s rather little public specifics about it. But here;s a description of what;s in the functions, courtesy of the Microsoft Investigation site:“Power consumption is really a major problem for information centers of all sizes which impacts the density of servers and the total cost of ownership. This is causing changes in information center configuration and management. Some components already support some power management features, for example server CPUs support dynamic clock and voltage scaling that enables power requirements to become reduced significantly during idle periods. Storage subsystems do not have power management and are consume a significant amount of power inside the information center. Modern enterprise grade disks require approximately 10W when idle. As storage requirements generally increase in data centers, the number of disks in data centers is increasing proportionally.”The DiskEnergy researchers just published a white paper, entitled “Write Off-Loading: Practical Power Management for Enterprise Storage.” The team is planning to present its paper in the Usenix FAST conference in February 2008.The synopsis:“Based on 1-week very long traces of core servers in our information center, we have found that there are significant periods of idle time during which disks may be spun down, and even longer ‘write-only; periods during which all I/O operations are writes. Based on this we have developed a technique called “write off-loading” which allows disks to stay spun down during these write-only periods, by temporarily off-loading the write requests to other volumes in the information center. Our results show that this provides power savings of 45—60%.”According to the paper;s conclusion, the DiskEnergy researchers are working on new tools “to help administrators decide how to save the most energy along with the least performance impact. ”Various teams at Microsoft have been looking into improving power-consumption of PCs and servers. Last year, the business announced an RFP of $500,Office 2007 Serial,000 for sustainable computing and and “adaptive power management solutions for maximizing the energy efficiency of computing infrastructure.”

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