This paper looks at the needs of build and release management, how those needs are met by open source and commercial tools that go way beyond the likes of Make or Ant, and the real costs of creating and maintaining a homegrown system.
Cooling for IT wiring closets is rarely planned and typically only implemented after failures or overheating occur. Historically, no clear standard exists for specifying sufficient cooling to achieve predictable behavior within wiring closets. An appropriate specification for cooling IT wiring closets should assure compatibility with anticipated loads, provide unambiguous instruction for design and installation of cooling equipment, prevent oversizing, maximize electrical efficiency, and be flexible enough to work in various shapes and types of closets. This paper describes the science and practical application of an improved method for the specification of cooling for wiring closets.
When working with data center and commercial facility electrical systems, shocks of 100mA to more than 2,000mA are possible—definitely in the realm of serious harm to humans and property. Energized electrical equipment also presents the risk of arc flash caused by electrical faults that produce powerful explosions. When dealing with commercial and industrial electrical systems, such as uninterruptible power systems (UPSs) and their batteries, data center and facilities managers need to be aware of these risks, especially since some repair and maintenance procedures require working with a unit that is still energized. There are ways to minimize the risks to employees, equipment and the field technician performing the service.
This paper answers some common questions about UPS maintenance, how to reduce the risks associated with servicing UPSs and batteries, and how to qualify a UPS service provider.
Arc flashes—the fiery explosions that can result from short circuits in high-power electrical devices—kill hundreds of workers in the U.S. every year and permanently injure thousands more. They can also wreak financial havoc in the form of fines, lawsuits, and damage to expensive equipment.
This white paper aims to fill that knowledge gap by providing introductory-level information about what arc flashes are and what you can do to prevent them.
Published By: Tripwire
Published Date: Jan 20, 2010
Gene Kim, CTO of Tripwire, describes seven practical steps owners and operators of the bulk power system can take to meet the mandatory IT configuration requirements set forth in the NERC-CIP standards. These steps help owners and operators avoid costly penalties for non-compliance while also protecting the Critical Cyber Assets that control or affect the reliability of North America's bulk electric power system.
A powerful signal integrity analysis tool must be flexibility, easy to use and integrated into an existing EDA framework and design flow. In addition, it is important for the tool to be accurate enough. This report reviews a validation study for the Mentor Graphics HyperLynx 8.0 PI tool to establish confidence in using it for power integrity analysis.
For advanced signaling over high-loss channels, designs today are using equalization and several new measurement methods to evaluate the performance of the link. Both simulation and measurement tools support equalization and the new measurement methods, but correlation of results throughout the design flow is unclear. In this paper a high performance equalizing serial data link is measured and the performance is compared to that predicted by simulation. Then, the differences between simulation and measurements are discussed as well as methods to correlate the two.
High Density Interconnect (HDI) is being used more often to meet the growing need for more complex designs in smaller form factors. Beyond some of the more obvious electrical effects of using smaller vias, there is also an impact to the power integrity of a board using HDI. This includes different effects of mounted inductances of decoupling capacitors, changes in plane performance due to reduction in perforation from chip pinouts, and the inherent plane-capacitance changes from using dielectrics of various thicknesses. This paper will examine and quantify these effects, using numerous design examples, including a large conventional through-hole design board that was reduced using HDI.
Buy-and-hold strategies can actually add costs to the datacenter, as systems age in place. Not only do hardware maintenance and software maintenance fees rise, over time – but the aging of applications also costs the organization money. Investing in a transition from POWER5 to POWER7 resulted in a return on investment (ROI) of more than 150 percent over three years.An insightful and and compelling discussion by IDC that reviews the primary reason for maintaining current systems -- Return on Investment. IDC studied IBM Power Systems sites that remained on the POWER5 platform long after its initial introduction in 2004. When comparisons to the succeeding generation of POWER7 are made, customers have found that the increase in scalability and performance of POWER7 systems, combined with a reduction in server "footprint" size and overall electrical requirements, resulted in significant reductions in ongoing costs, or opex, per 100 end users supported.
This in depth study addresses questions, such as “Is their enough physical space to install the fibers I need?” “Can I install the topology needed and still provide room for future expansion and ensure adequate fiber protection?”
This paper proposes standard terminology for categorizing the types of prefabricated modular data centers, defines and compares their key attributes, and provides a framework for choosing the best approach(es) based on business requirements.
One of the most frustrating aspects of the measurement of severe pyroshock events is the acceleration offset that almost invariably occurs. Dependent on its magnitude, this can result in large, low-frequency errors in both shock response spectra (SRS) and velocity-based damage analyses.
Fortunately, recent developments in accelerometer technology, signal conditioning, and data acquisition systems have reduced these errors significantly. Best practices have been demonstrated to produce offset errors less than 0.25% of Peak-Peak value in measured near-field pyrotechnic accelerations: a remarkable achievement.
This paper will discuss the sensing technologies, including both piezoelectric and piezoresistive, that have come together to minimize these offsets. More important, it will document the many other potential contributors to these offsets. Included among these are accelerometer mounting issues, cable and connector sources, signal conditioning amplitude range/bandwidth, and digitizi
With adhesive products, high performance and rigidity are often thought to go hand in hand. And it is true that the very best strength, thermal, chemical and electrical properties tend to be found in rigid compounds, especially epoxies. Yet there is a growing class of adhesives, sealants and coatings that add ductility to the long list of desirable epoxy properties.
This white paper examines the use of these toughened epoxies.
Today, data is constantly flowing in and out of organizations from electrical and mechanical sensors, RFID tags, smart meters, scanners, mobile devices, vehicles, live social media, machines and other objects. Did you know that a modern plane with more than 10,000 sensors just in the wings is expected to generate more than 7 terabytes a day? And Bain predicts that by 2020 annual revenues could exceed $470 billion for the internet of things (IoT) vendors selling hardware, software and comprehensive solutions.
Analysts believe that all of this data will drive a new type of industrial revolution – one that’s driven by highly accurate, real-time analysis, alerts and actions. Increasingly, machines will automate decisions and simply notify humans with instructions. Consider the promise of the IoT, where any object can be connected to the internet and continuously send and receive data. Gartner says that by 2020, 21 billion IoT devices will be in use worldwide.
Discover, map, and optimize assets to streamline global data centers, speed audits, slash costs: Using HP’s Business Services Management portfolio, GE Capital has realized an $8 million annual savings through data center consolidation. Find out how they addressed their key IT challenges of data center simplification, asset management and capacity management. GE Capital is the financial services unit of the American conglomerate General Electric. GE Capital provides commercial lending and leasing, as well as a range of financial services.
The hyperscale data center is reshaping the global IT landscape, shifting data from on-premises computer rooms and IT closets to massive centralized data center hubs. Workloads are consolidating in the world’s largest and most efficient facilities. These cloud campuses offer economies of scale, enabling hyperscale operators to rapidly add server capacity and electric power.
DatacenterDynamics is a brand of DCD Group, a global B2B media and publishing company that develops products to help senior professionals in the world's most ICT dependent organizations make risk-based infrastructure and capacity decisions.
Our portfolio of live events, online and print publishing, business intelligence and professional development brands are centred on the complexities of technology convergence. Operating in 42 different countries, we have developed a unique global knowledge and networking platform, which is trusted by over 30,000 ICT, engineering and technology professionals.
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