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- Veröffentlicht auf Amazon.com
Dr. John Lamb has a Ph.D. in engineering science, which is quite apparent in
reading his book, "The Greening of IT." This book provides a welcome relief from the
many books that center around virtualization as the panacea for energy utilization. While
"The Greening of IT" does have virtualization as one of the steps required for lowering
energy utilization, it takes an engineering approach. He says, "This book provides details
on the importance of implementing green IT....and especially the case studies for
`lessons learned' and the best practice approaches for implementing green IT."
Dr. Lamb provides a global view of Green IT. This is appreciated as he puts
Green IT in a world-wide perspective, detailing why we need to save energy. The global
view of Green IT continues by placing it squarely in the roadmap for "reducing
greenhouse gases which, in turn, can help reduce global warming," a goal for both the
United Nations (UN) as well as the White House.
Throughout the book are sprinkled engineering explanations such as the
difference between volts, watt, amps, KWHs and voltage levels. As another example, Dr.
Lamb's explanation of "Data Center Cooling Basics" clarifies HVAC systems, the
cooling equipment, and new technology (such as stored cooling, thermal storage systems,
and phase change materials.
Dr. Lamb uses IBM's 5-step program for datacenter efficiency: diagnose,
manage and measure, use energy-efficient cooling, virtualize, and build new or upgrade
facilities when feasible.
Then there are two sections which I have not found in other books: (1) tuning
your applications to require less CPU and (2) Greening your laptop. Tuning applications
often does not happen as we virtualize applications and consolidate them rather than
looking inside the application to use less CPU. Many applications can be tuned to use
25% less hardware then today, however, requires time as the original application
developer is usually not still employed by the corporation. Greening our laptops is a
good idea as well and is a great step to helping use less energy. Dr. Lamb gives the
instructions in his book for Power Management Features and provides the option of
utilizing a thin client PC for corporations as well. (Maybe PROFS will come back, the
original thin client application by IBM, known either as Professional Office System or
PF Keys Rigidly On Freakish Settings).
Dr. Lamb's section on collaboration is interesting as it discusses the need for IT
vendors to "integrat(e) their hardware, software, and services" to help customers improve
their energy initiatives. Further, there is a good overview of IBM's energy monitoring
programs as well. The part where Dr. Lamb allows himself to go back to more
engineering-related topics where is really interesting. The chapter on "The Magic of
`Incentive' -- The Role of Electric Utilities" and "PG&E Lead Utility Energy Efficiency
Coalition" of the impact of energy companies on the Greening of IT and available
incentive programs. This type of explanation, looking outside the typical datacenter and
to the energy companies, was new to me.
The section on virtualization is made more interesting by the SPEC metrics for
virtual servers. Note that older frame's utilization is not tied to their power consumption.
Newer, greener frames use more power as the utilization rises. What is not covered here,
however, is the re-platforming of servers from, for example, a system p environment to a
system z environment. IBM Enterprise Computing Model (ECM) has re-platformed
hundreds of pSeries LPARs into a z/Linux box and reduced all costs as well as lowered
energy utilization. Maybe Dr. Lamb will put that in his next book.
In all, the 5-step approach for an "Energy Efficient Data Center" - Diagnose,
Build, Virtualize, Manage and Measure, and Cool - provides corporations a look at their
datacenter energy costs and find ways to improve their energy utilization and their
virtualization penetration. The emphasis on measurement throughout the book is very
important as Dr. Lamb provides methodologies for baselining (what to baseline) as well
as energy-measurement tools. The book ends with appendices and checklists to actually
do this work. This is not a theoretical book for anyone dealing with high energy costs, it
is a must-read to put a team in place to Go Green!