Creating Order from Chaos in Data Centers and Server Rooms
by Dennis Bouley
Data center professionals can rid themselves of messy racks, sub-standard under floor air distribution, and cable sprawl with a minimum of heartache and expense. Whether the data center mess is created over years of mismanagement or whether the cable-choked data center is inherited, solutions for both quick fixes and longer term evolutionary changes exist. This paper outlines several innovative approaches for dealing with the symptoms of chaos and for eliminating the root causes of disorder.
Cooling Strategies for IT Wiring Closets and Small Rooms
by Neil Rasmussen & Brian Standley
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.
Comparing Availability of Various Rack Power Redundancy Configurations
by Victor Avelar
Transfer switches and dual-path power distribution to IT equipment are used to enhance the availability of computing systems. Statistical availability analysis techniques suggest large differences in availability are expected between the various methods commonly employed. This paper examines various electrical architectures for redundancy that are implemented in today's mission-critical environments. The availability analyses of these various scenarios are then performed and the results are presented. The analysis identifies which approach provides the best overall performance, and how alternatives compare in performance and value.
Avoidable Mistakes that Compromise Cooling Performance in Data Centers and Network Rooms
by Neil Rasmussen
Avoidable mistakes that are routinely made when installing cooling systems and racks in data centers or network rooms compromise availability and increase costs. These unintentional flaws create hot-spots, decrease fault tolerance, decrease efficiency, and reduce cooling capacity. Although facilities operators are often held accountable for cooling problems, many problems are actually caused by improper deployment of IT equipment outside of their control. This paper examines these typical mistakes, explains their principles, quantifies their impacts, and describes simple remedies.
The Seven Types of Power Problems
by Joseph Seymour
Many of the mysteries of equipment failure, downtime, software and data corruption, are often the result of a problematic supply of power. There is also a common problem with describing power problems in a standard way. This white paper will describe the most common types of power disturbances, what can cause them, what they can do to your critical equipment, and how to safeguard your equipment, using the IEEE standards for describing power quality problems.
How Monitoring Systems Reduce Human Error in Distributed Server Rooms and Remote Wiring Closets
by Dennis Bouley
Surprise incidences of downtime in server rooms and remote wiring closets lead to sleepless nights for many IT managers. Most can recount horror stories about how bad luck, human error, or just simple incompetence brought their server rooms down. This paper analyzes several of these incidents and makes recommendations for how a basic monitoring system can help reduce the occurrence of these unanticipated events.
How Data Center Infrastructure Management Software Improves Planning and Cuts Operational Costs
by Torben Karup Nielsen & Dennis Bouley
Business executives are challenging their IT staffs to convert data centers from cost centers into producers of business value. Data centers can make a significant impact to the bottom line by enabling the business to respond more quickly to market demands. This paper demonstrates, through a series of examples, how data center infrastructure management software tools can simplify operational processes, cut costs, and speed up information delivery.
High-Efficiency AC Power Distribution for Green Data Centers
by Neil Rasmussen
The use of 240 volt power distribution for data centers saves floor space, simplifies power cabling, saves capital cost, reduces weight, and increases electrical efficiency. This paper describes the various con-figurations for this distribution architecture and quantifies the benefits for the optimal configuration. Note: The methods in this paper only apply in North America and are for problems that are unique to North America.
A Quantitative Comparison of High Efficiency AC vs. DC Power Distribution for Data Centers
by Neil Rasmussen & James Spitaels
This paper presents a detailed quantitative efficiency comparison between the most efficient DC and AC power distribution methods, including an analysis of the effects of power distribution efficiency on the cooling power requirement and on total electrical consumption. The latest high efficiency AC and DC power distribution architectures are shown to have virtually the same efficiency, suggesting that a move to a DC-based architecture is unwarranted on the basis of efficiency.
Review of Four Studies Comparing Efficiency of AC and DC Distribution for Data Centers
by Neil Rasmussen
DC is proposed for use in data centers as an alternative to AC distribution primarily based on publicized claims of efficiency improvements and energy savings. This paper shows that the most widely cited values for quantitative improvements are wrong and grossly overstate the efficiency differences between AC and DC, and that the latest AC and DC systems provide effectively the same efficiency. This paper compares the results of four different publicized studies and explains the assumptions and mistakes that have led to erroneous but widely circulated beliefs about the efficiency benefits of DC power distribution.
Virtualization and Cloud Computing: Optimized Power, Cooling, and Management Maximizes Benefits
by Suzanne Niles & Patrick Donovan
IT virtualization, the engine behind cloud computing, can have significant consequences on the data center physical infrastructure (DCPI). Higher power densities that often result can challenge the cooling capabilities of an existing system. Reduced overall energy consumption that typically results from physical server consolidation may actually worsen the data center's power usage effectiveness (PUE). Dynamic loads that vary in time and location may heighten the risk of downtime if rack-level power and cooling health are not understood and considered. Finally, the fault-tolerant nature of a highly virtualized environment could raise questions about the level of redundancy required in the physical infrastructure. These particular effects of virtualization are discussed and possible solutions or methods for dealing with them are offered.
Avoiding Common Pitfalls of Evaluating and Implementing DCIM Solutions
by Patrick Donovan
While many who invest in Data Center Infrastructure Management (DCIM) software benefit greatly, some do not. Research has revealed a number of pitfalls that end users should avoid when evaluating and implementing DCIM solutions. Choosing an inappropriate solution, relying on inadequate processes, and a lack of commitment / ownership / knowledge can each undermine a chosen toolset's ability to deliver the value it was designed to provide. This paper describes these common pitfalls and provides practical guidance on how to avoid them.
StruxureWare™ for Data Centers: Overview
The role of the Data Center Manager is more critical than ever. From virtualization, to cloud computing and high density, your data center means business to your company. Learn how the StruxureWare™ can help enable sucessful management and operations of your data center today
StruxureWare™ for Data Centers: Introduction to DCIM
Managing the complexity of your data center environment can be daunting. Learn about issues impacting the physical layer and ways you can manage them with solutions available today.
StruxureWare™ for Data Centers: Data Aggregation
Data center monitoring is only as good as your ability to interpret it. Learn how the StruxureWare™ can aggregate key data points into simple dashboards to help you manage your physical infrastructure, optimize capacity, and maximize energy efficiency.
StruxureWare™ for Data Centers: Documentation and Inventory Management
For many data center managers, tracking and documenting inventory is an undercover project done on notebooks and spreadsheets. Learn how the StruxureWare™ can help you manage your assets professionally -- like you manage the rest of your data center.
StruxureWare™ for Data Centers: Energy Efficiency
With power costs on the rise, boosting your energy efficiency may be the key to keeping your company competitive. Learn how the StruxureWare™ can help maximize your data center's energy efficiency and contribute to your bottom line.
StruxureWare™ for Data Centers: IT Equipment Data Provisioning
In the large and extra large data center, IT equipment provisioning can become extremely complicated. See how the StruxureWare™ can help simplify this process and give you peace of mind.
StruxureWare™ for Data Centers: Optimization & Utilization
As data centers become more dense, optimization and utilization become key elements to extending the life of your existing data center. See how the StruxureWare™ can enable the optimization and utilization of your data center capacity. APC's StruxureWare™ is supporting data centers world wide.