Wikitip
Welcome to the Wikibon Sustainability Portal. In this space we focus on the application of 'Green' technologies to create more energy efficiency IT and business environments. We welcome you to browse the portal, share best practices with peers by writing a Wikitip or joining in a Peer Incite Research Meeting.
The Wikibon Green IT Technology Portal contains green IT industry research, articles, expert opinion, case studies, and green IT technology company profiles.
Latest Green Peer Incites:
1. JCPenney's Drive to Green IT (5:09)
2. The Power Shift to Green Computing. Peter Burris summarizes Wikibon's Peer Incite on Green IT (4:27)
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Wikitip
Words games are not the sole prerogative of the politician. Our marketing colleagues have a tendency to push the envelope with the latest example being some folk’s interpretation of the term Storage Utilization.
When I think of storage utilization I tend to think of the capacity available to the user to perform useful work after all system overhead has been considered. I do not consider the capacity required to protect or manage stored data as user available storage. So when data is being protected with mirroring for example, storage utilization is significantly less than when RAID 5 or RAID 6 is implemented.
Date Protection Scheme..................Storage Penalty
Mirrored...........................................50%
RAID 5.............................................17% (5+1 Raid Group)
RAID 6.............................................33% (4+2 Raid Group)
Except in the case of mirroring the bigger the RAID group the smaller the penalty which is one of the configuration compromises, now add the system OS etc, you get the point.
So when you see eye catching guarantees of Storage Utilization make sure you understand how this utilization is being defined. You may be surprised.
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Featured Case Study
Wikibon reviewed the power measurements made on 3PAR’s InServ E200, S400 and S800 storage arrays. These arrays are built from standard components, and enable the power of different configurations to be calculated. The measurements were made at the component level.
The measurements were made across three different workloads:
- Sequential read, with a 512K block size
- Random read, with a 16K block size
- Idle (no data being transferred)
The results of the three workloads were averaged to produce an overall figure of power consumption for each of the components of the 3PAR arrays. Wikibon believes that the benchmarks used and the power measurements made were done professionally and in good faith. In the opinion of Wikibon, this measurement represents a good and reasonable estimate of the power consumed in real world applications across a number of drives for applications typcally found in a data center.
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| Sustainability Professional Alerts
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Featured How-To Note
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Fluctuating energy prices have heightened electricity and energy consumption as a major issue within the technology community. IT is a significant consumer of energy and IT energy costs have been rising disproportionately because of continued investment in denser IT equipment. Estimates from the EPA and others indicate that IT will account for 3% of energy consumption by 2012.
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Featured Case Study
The corporate IT group of a very large, worldwide financial organization with 100,000 employees, has initiated an ongoing “greening” process. This is focused largely on reducing energy use both to decrease the corporation's carbon footprint while creating a net savings in operational costs over the lifetime of new, more energy-efficient equipment, including new storage systems.
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| Storage Professional Alerts
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Featured How-To Note
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Fluctuating energy prices have heightened electricity and energy consumption as a major issue within the technology community. IT is a significant consumer of energy and IT energy costs have been rising disproportionately because of continued investment in denser IT equipment. Estimates from the EPA and others indicate that IT will account for 3% of energy consumption by 2012.
read more...
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