Data center

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ARSAT data center (2014) Datacenter de ARSAT.jpg
ARSAT data center (2014)

A data center (American English) [1] or data centre (British English) [2] [note 1] is a building, a dedicated space within a building, or a group of buildings [3] used to house computer systems and associated components, such as telecommunications and storage systems. [4] [5]

Contents

Since IT operations are crucial for business continuity, it generally includes redundant or backup components and infrastructure for power supply, data communication connections, environmental controls (e.g., air conditioning, fire suppression), and various security devices. A large data center is an industrial-scale operation using as much electricity as a small town. [6]

History

NASA mission control computer room c. 1962 NASAComputerRoom7090.NARA.jpg
NASA mission control computer room c. 1962

Data centers have their roots in the huge computer rooms of the 1940s, typified by ENIAC, one of the earliest examples of a data center. [7] [note 2] Early computer systems, complex to operate and maintain, required a special environment in which to operate. Many cables were necessary to connect all the components, and methods to accommodate and organize these were devised such as standard racks to mount equipment, raised floors, and cable trays (installed overhead or under the elevated floor). A single mainframe required a great deal of power and had to be cooled to avoid overheating. Security became important – computers were expensive, and were often used for military purposes. [7] [note 3] Basic design-guidelines for controlling access to the computer room were therefore devised.

During the boom of the microcomputer industry, and especially during the 1980s, users started to deploy computers everywhere, in many cases with little or no care about operating requirements. However, as information technology (IT) operations started to grow in complexity, organizations grew aware of the need to control IT resources. The availability of inexpensive networking equipment, coupled with new standards for the network structured cabling, made it possible to use a hierarchical design that put the servers in a specific room inside the company. The use of the term "data center", as applied to specially designed computer rooms, started to gain popular recognition about this time. [7] [note 4]

The boom of data centers came during the dot-com bubble of 1997–2000. [8] [note 5] Companies needed fast Internet connectivity and non-stop operation to deploy systems and to establish a presence on the Internet. Installing such equipment was not viable for many smaller companies. Many companies started building very large facilities, called Internet data centers (IDCs), [9] which provide enhanced capabilities, such as crossover backup: "If a Bell Atlantic line is cut, we can transfer them to ... to minimize the time of outage." [9]

The term cloud data centers (CDCs) has been used. [10] Data centers typically cost a lot to build and maintain. [8] Increasingly, the division of these terms has almost disappeared and they are being integrated into the term "data center". [11]

Requirements for modern data centers

Racks of telecommunications equipment in part of a data center Datacenter-telecom.jpg
Racks of telecommunications equipment in part of a data center

Modernization and data center transformation enhances performance and energy efficiency. [12]

Information security is also a concern, and for this reason, a data center has to offer a secure environment that minimizes the chances of a security breach. A data center must, therefore, keep high standards for assuring the integrity and functionality of its hosted computer environment.

Industry research company International Data Corporation (IDC) puts the average age of a data center at nine years old. [12] Gartner, another research company, says data centers older than seven years are obsolete. [13] The growth in data (163 zettabytes by 2025 [14] ) is one factor driving the need for data centers to modernize.

Focus on modernization is not new: concern about obsolete equipment was decried in 2007, [15] and in 2011 Uptime Institute was concerned about the age of the equipment therein. [note 6] By 2018 concern had shifted once again, this time to the age of the staff: "data center staff are aging faster than the equipment." [16]

Meeting standards for data centers

The Telecommunications Industry Association's Telecommunications Infrastructure Standard for Data Centers [17] specifies the minimum requirements for telecommunications infrastructure of data centers and computer rooms including single tenant enterprise data centers and multi-tenant Internet hosting data centers. The topology proposed in this document is intended to be applicable to any size data center. [18]

Telcordia GR-3160, NEBS Requirements for Telecommunications Data Center Equipment and Spaces, [19] provides guidelines for data center spaces within telecommunications networks, and environmental requirements for the equipment intended for installation in those spaces. These criteria were developed jointly by Telcordia and industry representatives. They may be applied to data center spaces housing data processing or Information Technology (IT) equipment. The equipment may be used to:

Data center transformation

Data center transformation takes a step-by-step approach through integrated projects carried out over time. This differs from a traditional method of data center upgrades that takes a serial and siloed approach. [20] The typical projects within a data center transformation initiative include standardization/consolidation, virtualization, automation and security.

Raised floor

Perforated cooling floor tile. Floor Panel Bottom Perf.jpg
Perforated cooling floor tile.

A raised floor standards guide named GR-2930 was developed by Telcordia Technologies, a subsidiary of Ericsson. [32]

Although the first raised floor computer room was made by IBM in 1956, [33] and they've "been around since the 1960s", [34] it was the 1970s that made it more common for computer centers to thereby allow cool air to circulate more efficiently. [35] [36]

The first purpose of the raised floor was to allow access for wiring. [33]

Lights out

The "lights-out" [37] data center, also known as a darkened or a dark data center, is a data center that, ideally, has all but eliminated the need for direct access by personnel, except under extraordinary circumstances. Because of the lack of need for staff to enter the data center, it can be operated without lighting. All of the devices are accessed and managed by remote systems, with automation programs used to perform unattended operations. In addition to the energy savings, reduction in staffing costs and the ability to locate the site further from population centers, implementing a lights-out data center reduces the threat of malicious attacks upon the infrastructure. [38] [39]

Data center levels and tiers

The two organizations in the United States that publish data center standards are the Telecommunications Industry Association (TIA) and the Uptime Institute.

International standards EN50600 and ISO22237 Information technology — Data center facilities and infrastructures

Telecommunications Industry Association

The Telecommunications Industry Association's TIA-942 standard for data centers, published in 2005 and updated four times since, defined four infrastructure levels. [40]

Uptime Institute – Data center Tier Classification Standard

Four Tiers are defined by the Uptime Institute standard:

A fifth tier has been Trademark ed by Switch (company), who have used this tier to define The Citadel, the largest data center in the world. [41] [42]

Data center design

The field of data center design has been growing for decades in various directions, including new construction big and small along with the creative re-use of existing facilities, like abandoned retail space, old salt mines and war-era bunkers.

Local building codes may govern the minimum ceiling heights and other parameters. Some of the considerations in the design of data centers are:

A typical server rack, commonly seen in colocation Rack001.jpg
A typical server rack, commonly seen in colocation
CRAC Air Handle CRAC Cabinets 2.jpg
CRAC Air Handle

Design criteria and trade-offs

High availability

Various metrics exist for measuring the data-availability that results from data-center availability beyond 95% uptime, with the top of the scale counting how many "nines" can be placed after "99%". [50]

Modularity and flexibility

Modularity and flexibility are key elements in allowing for a data center to grow and change over time. Data center modules are pre-engineered, standardized building blocks that can be easily configured and moved as needed. [51]

A modular data center may consist of data center equipment contained within shipping containers or similar portable containers. [52] Components of the data center can be prefabricated and standardized which facilitates moving if needed. [53]

Environmental control

Temperature [note 7] and humidity are controlled via:

It is important that computers do not get humid or overheat, as high humidity can lead to dust clogging the fans, which leads to overheat, or can cause components to malfunction, ruining the board and running a fire hazard. Overheat can cause components, usually the silicon or copper of the wires or circuits to melt, causing connections to loosen, causing fire hazards.

Electrical power

A bank of batteries in a large data center, used to provide power until diesel generators can start Datacenter Backup Batteries.jpg
A bank of batteries in a large data center, used to provide power until diesel generators can start

Backup power consists of one or more uninterruptible power supplies, battery banks, and/or diesel / gas turbine generators. [56]

To prevent single points of failure, all elements of the electrical systems, including backup systems, are typically given redundant copies , and critical servers are connected to both the "A-side" and "B-side" power feeds. This arrangement is often made to achieve N+1 redundancy in the systems. Static transfer switches are sometimes used to ensure instantaneous switchover from one supply to the other in the event of a power failure.

Low-voltage cable routing

Options include:

Air flow

Air flow management addresses the need to improve data center computer cooling efficiency by preventing the recirculation of hot air exhausted from IT equipment and reducing bypass airflow. There are several methods of separating hot and cold airstreams, such as hot/cold aisle containment and in-row cooling units. [58]

Aisle containment

Cold aisle containment is done by exposing the rear of equipment racks, while the fronts of the servers are enclosed with doors and covers. This is similar to how large-scale food companies refrigerate and store their products.

Typical cold aisle configuration with server rack fronts facing each other and cold air distributed through the raised floor. Cabinet Asile.jpg
Typical cold aisle configuration with server rack fronts facing each other and cold air distributed through the raised floor.

Computer cabinets/Server farms are often organized for containment of hot/cold aisles. Proper air duct placement prevents the cold and hot air from mixing. Rows of cabinets are paired to face each other so that the cool and hot air intakes and exhausts don't mix air, which would severely reduce cooling efficiency.

Alternatively, a range of underfloor panels can create efficient cold air pathways directed to the raised floor vented tiles. Either the cold aisle or the hot aisle can be contained. [59]

Another option is fitting cabinets with vertical exhaust ducts Chimney [60] Hot exhaust pipes/vents/ducts can direct the air into a Plenum space above a Dropped ceiling and back to the cooling units or to outside vents. With this configuration, traditional hot/cold aisle configuration is not a requirement. [61]

Fire protection

FM200 Fire Suppression Tanks FM200 Three.jpg
FM200 Fire Suppression Tanks

Data centers feature fire protection systems, including passive and Active Design elements, as well as implementation of fire prevention programs in operations. Smoke detectors are usually installed to provide early warning of a fire at its incipient stage.

Although the main room usually does not allow Wet Pipe-based Systems due to the fragile nature of Circuit-boards, there still exist systems that can be used in the rest of the facility or in cold/hot aisle air circulation systems that are closed systems, such as: [62]

However, there also exist other means to put out fires, especially in Sensitive areas, usually using Gaseous fire suppression, of which Halon gas was the most popular, until the negative effects of producing and using it were discovered.

Security

Physical access is usually restricted. Layered security often starts with fencing, bollards and mantraps. [63] Video camera surveillance and permanent security guards are almost always present if the data center is large or contains sensitive information. Fingerprint recognition mantraps is starting to be commonplace.

Logging access is required by some data protection regulations; some organizations tightly link this to access control systems. Multiple log entries can occur at the main entrance, entrances to internal rooms, and at equipment cabinets. Access control at cabinets can be integrated with intelligent power distribution units, so that locks are networked through the same appliance. [64]

Energy use

Google Data Center, The Dalles, Oregon Google Data Center, The Dalles.jpg
Google Data Center, The Dalles, Oregon

Energy use is a central issue for data centers. Power draw ranges from a few kW for a rack of servers in a closet to several tens of MW for large facilities. Some facilities have power densities more than 100 times that of a typical office building. [65] For higher power density facilities, electricity costs are a dominant operating expense and account for over 10% of the total cost of ownership (TCO) of a data center. [66]

Greenhouse gas emissions

In 2020 data centers (excluding cryptocurrency mining) and data transmission each used about 1% of world electricity. [67] Although some of this electricity was low carbon, the IEA called for more "government and industry efforts on energy efficiency, renewables procurement and RD&D", [67] as some data centers still use electricity generated by fossil fuels. [68] They also said that lifecycle emissions should be considered, that is including "embodied" emissions, such as in buildings. [67] Data centers are estimated to have been responsible for 0.5% of US greenhouse gas emissions in 2018. [69] Some Chinese companies, such as Tencent, have pledged to be carbon neutral by 2030, while others such as Alibaba have been criticized by Greenpeace for not committing to become carbon neutral. [70]

Energy efficiency and overhead

The most commonly used energy efficiency metric of data center energy efficiency is power usage effectiveness (PUE), calculated as the ratio of total power entering the data center divided by the power used by IT equipment.

It measures the percentage of power used by overhead (cooling, lighting, etc.). The average USA data center has a PUE of 2.0, [71] meaning two watts of total power (overhead + IT equipment) for every watt delivered to IT equipment. State-of-the-art is estimated to be roughly 1.2. [72] Google publishes quarterly efficiency from data centers in operation. [73]

The U.S. Environmental Protection Agency has an Energy Star rating for standalone or large data centers. To qualify for the ecolabel, a data center must be within the top quartile of energy efficiency of all reported facilities. [74] The Energy Efficiency Improvement Act of 2015 (United States) requires federal facilities — including data centers — to operate more efficiently. California's title 24 (2014) of the California Code of Regulations mandates that every newly constructed data center must have some form of airflow containment in place to optimize energy efficiency.

European Union also has a similar initiative: EU Code of Conduct for Data Centres. [75]

Energy use analysis and projects

The focus of measuring and analyzing energy use goes beyond what's used by IT equipment; facility support hardware such as chillers and fans also use energy. [76]

In 2011 server racks in data centers were designed for more than 25 kW and the typical server was estimated to waste about 30% of the electricity it consumed. The energy demand for information storage systems was also rising. A high availability data center was estimated to have a 1 mega watt (MW) demand and consume $20,000,000 in electricity over its lifetime, with cooling representing 35% to 45% of the data center's total cost of ownership. Calculations showed that in two years the cost of powering and cooling a server could be equal to the cost of purchasing the server hardware. [77] Research in 2018 has shown that substantial amount of energy could still be conserved by optimizing IT refresh rates and increasing server utilization. [78]

In 2011 Facebook, Rackspace and others founded the Open Compute Project (OCP) to develop and publish open standards for greener data center computing technologies. As part of the project Facebook published the designs of its server, which it had built for its first dedicated data center in Prineville. Making servers taller left space for more effective heat sinks and enabled the use of fans that moved more air with less energy. By not buying commercial off-the-shelf servers, energy consumption due to unnecessary expansion slots on the motherboard and unneeded components, such as a graphics card, was also saved. [79] In 2016 Google joined the project and published the designs of its 48V DC shallow data center rack. This design had long been part of Google data centers. By eliminating the multiple transformers usually deployed in data centers, Google had achieved a 30% increase in energy efficiency. [80] In 2017 sales for data center hardware built to OCP designs topped $1.2 billion and are expected to reach $6 billion by 2021. [79]

Power and cooling analysis

Data center at CERN (2010) Cern datacenter.jpg
Data center at CERN (2010)

Power is the largest recurring cost to the user of a data center. [81] Cooling it at or below 70 °F (21 °C) wastes money and energy. [81] Furthermore, overcooling equipment in environments with a high relative humidity can expose equipment to a high amount of moisture that facilitates the growth of salt deposits on conductive filaments in the circuitry. [82]

A power and cooling analysis, also referred to as a thermal assessment, measures the relative temperatures in specific areas as well as the capacity of the cooling systems to handle specific ambient temperatures. [83] A power and cooling analysis can help to identify hot spots, over-cooled areas that can handle greater power use density, the breakpoint of equipment loading, the effectiveness of a raised-floor strategy, and optimal equipment positioning (such as AC units) to balance temperatures across the data center. Power cooling density is a measure of how much square footage the center can cool at maximum capacity. [84] The cooling of data centers is the second largest power consumer after servers. The cooling energy varies from 10% of the total energy consumption in the most efficient data centers and goes up to 45% in standard air-cooled data centers.

Energy efficiency analysis

An energy efficiency analysis measures the energy use of data center IT and facilities equipment. A typical energy efficiency analysis measures factors such as a data center's power use effectiveness (PUE) against industry standards, identifies mechanical and electrical sources of inefficiency, and identifies air-management metrics. [85] However, the limitation of most current metrics and approaches is that they do not include IT in the analysis. Case studies have shown that by addressing energy efficiency holistically in a data center, major efficiencies can be achieved that are not possible otherwise. [86]

Computational fluid dynamics (CFD) analysis

This type of analysis uses sophisticated tools and techniques to understand the unique thermal conditions present in each data center—predicting the temperature, airflow, and pressure behavior of a data center to assess performance and energy consumption, using numerical modeling. [87] By predicting the effects of these environmental conditions, CFD analysis in the data center can be used to predict the impact of high-density racks mixed with low-density racks [88] and the onward impact on cooling resources, poor infrastructure management practices and AC failure or AC shutdown for scheduled maintenance.

Thermal zone mapping

Thermal zone mapping uses sensors and computer modeling to create a three-dimensional image of the hot and cool zones in a data center. [89]

This information can help to identify optimal positioning of data center equipment. For example, critical servers might be placed in a cool zone that is serviced by redundant AC units.

Green data centers

This water-cooled data center in the Port of Strasbourg, France claims the attribute green. Magazin Vauban E.jpg
This water-cooled data center in the Port of Strasbourg, France claims the attribute green.

Data centers use a lot of power, consumed by two main usages: the power required to run the actual equipment and then the power required to cool the equipment. Power-efficiency reduces the first category.

Cooling cost reduction from natural ways includes location decisions: When the focus is not being near good fiber connectivity, power grid connections and people-concentrations to manage the equipment, a data center can be miles away from the users. 'Mass' data centers like Google or Facebook don't need to be near population centers. Arctic locations can use outside air, which provides cooling, are getting more popular. [90]

Renewable electricity sources are another plus. Thus countries with favorable conditions, such as: Canada, [91] Finland, [92] Sweden, [93] Norway, [94] and Switzerland, [95] are trying to attract cloud computing data centers.

Bitcoin mining is increasingly being seen as a potential way to build data centers at the site of renewable energy production. Curtailed and clipped energy can be used to secure transactions on the Bitcoin blockchain providing another revenue stream to renewable energy producers. [96]

Energy reuse

It is very difficult to reuse the heat which comes from air cooled data centers. For this reason, data center infrastructures are more often equipped with heat pumps. [97] An alternative to heat pumps is the adoption of liquid cooling throughout a data center. Different liquid cooling techniques are mixed and matched to allow for a fully liquid cooled infrastructure which captures all heat in water. Different liquid technologies are categorized in 3 main groups, Indirect liquid cooling (water cooled racks), Direct liquid cooling (direct-to-chip cooling) and Total liquid cooling (complete immersion in liquid, see Server immersion cooling). This combination of technologies allows the creation of a thermal cascade as part of temperature chaining scenarios to create high temperature water outputs from the data center.

Dynamic infrastructure

Dynamic infrastructure [98] provides the ability to intelligently, automatically and securely move workloads within a data center [99] anytime, anywhere, for migrations, provisioning, [100] to enhance performance, or building co-location facilities. It also facilitates performing routine maintenance on either physical or virtual systems all while minimizing interruption. A related concept is Composable infrastructure, which allows for the dynamic reconfiguration of the available resources to suit needs, only when needed. [101]

Side benefits include

Network infrastructure

An operation engineer overseeing a network operations control room of a data center (2006) NetworkOperations.jpg
An operation engineer overseeing a network operations control room of a data center (2006)
An example of network infrastructure of a data center Eqiadwmf 9046.jpg
An example of network infrastructure of a data center

Communications in data centers today are most often based on networks running the IP protocol suite. Data centers contain a set of routers and switches that transport traffic between the servers and to the outside world [103] which are connected according to the data center network architecture. Redundancy of the Internet connection is often provided by using two or more upstream service providers (see Multihoming).

Some of the servers at the data center are used for running the basic Internet and intranet services needed by internal users in the organization, e.g., e-mail servers, proxy servers, and DNS servers.

Network security elements are also usually deployed: firewalls, VPN gateways, intrusion detection systems, and so on. Also common are monitoring systems for the network and some of the applications. Additional off site monitoring systems are also typical, in case of a failure of communications inside the data center.

Software/data backup

Non-mutually exclusive options for data backup are:

Onsite is traditional, [104] and one major advantage is immediate availability.

Offsite backup storage

Data backup techniques include having an encrypted copy of the data offsite. Methods used for transporting data are: [105]

Modular data center

A 40-foot Portable Modular Data Center IBMPortableModularDataCenter.jpg
A 40-foot Portable Modular Data Center

For quick deployment or disaster recovery, several large hardware vendors have developed mobile/modular solutions that can be installed and made operational in very short time.

See also

Notes

  1. See spelling differences.
  2. Old large computer rooms that housed machines like the U.S. Army's ENIAC, which were developed pre-1960 (1945), were now referred to as "data centers".
  3. Until the early 1960s, it was primarily the government that used computers, which were large mainframes housed in rooms that today we call data centers.
  4. In the 1990s, network-connected minicomputers (servers) running without input or display devices were housed in the old computer rooms. These new "data centers" or "server rooms" were built within company walls, co-located with low-cost networking equipment.
  5. There was considerable construction of data centers during the early 2000s, in the period of expanding dot-com businesses.
  6. In May 2011, data center research organization Uptime Institute reported that 36 percent of the large companies it surveyed expect to exhaust IT capacity within the next 18 months. James Niccolai. "Data Centers Turn to Outsourcing to Meet Capacity Needs". CIO magazine .
  7. Eight vendors' temperature recommendations can be found here
  8. instead of chillers/air conditioners, resulting in energy savings

Related Research Articles

<span class="mw-page-title-main">Thin client</span> Non-powerful computer optimized for remote server access

In computer networking, a thin client is a simple (low-performance) computer that has been optimized for establishing a remote connection with a server-based computing environment. They are sometimes known as network computers, or in their simplest form as zero clients. The server does most of the work, which can include launching software programs, performing calculations, and storing data. This contrasts with a rich client or a conventional personal computer; the former is also intended for working in a client–server model but has significant local processing power, while the latter aims to perform its function mostly locally.

<span class="mw-page-title-main">19-inch rack</span> Standard width frame for C&N equipment

A 19-inch rack is a standardized frame or enclosure for mounting multiple electronic equipment modules. Each module has a front panel that is 19 inches (482.6 mm) wide. The 19 inch dimension includes the edges or "ears" that protrude from each side of the equipment, allowing the module to be fastened to the rack frame with screws or bolts. Common uses include computer servers, telecommunications equipment and networking hardware, audiovisual production gear, and scientific equipment.

<span class="mw-page-title-main">Server (computing)</span> Computer to access a central resource or service on a network

In computing, a server is a piece of computer hardware or software that provides functionality for other programs or devices, called "clients". This architecture is called the client–server model. Servers can provide various functionalities, often called "services", such as sharing data or resources among multiple clients, or performing computation for a client. A single server can serve multiple clients, and a single client can use multiple servers. A client process may run on the same device or may connect over a network to a server on a different device. Typical servers are database servers, file servers, mail servers, print servers, web servers, game servers, and application servers.

A colocation center or "carrier hotel", is a type of data centre where equipment, space, and bandwidth are available for rental to retail customers. Colocation facilities provide space, power, cooling, and physical security for the server, storage, and networking equipment of other firms and also connect them to a variety of telecommunications and network service providers with a minimum of cost and complexity.

<span class="mw-page-title-main">Server farm</span> Collection of computer servers

A server farm or server cluster is a collection of computer servers, usually maintained by an organization to supply server functionality far beyond the capability of a single machine. They often consist of thousands of computers which require a large amount of power to run and to keep cool. At the optimum performance level, a server farm has enormous financial and environmental costs. They often include backup servers that can take over the functions of primary servers that may fail. Server farms are typically collocated with the network switches and/or routers that enable communication between different parts of the cluster and the cluster's users. Server "farmers" typically mount computers, routers, power supplies and related electronics on 19-inch racks in a server room or data center.

<span class="mw-page-title-main">Blade server</span> Server computer that uses less energy and space than a conventional server

A blade server is a stripped-down server computer with a modular design optimized to minimize the use of physical space and energy. Blade servers have many components removed to save space, minimize power consumption and other considerations, while still having all the functional components to be considered a computer. Unlike a rack-mount server, a blade server fits inside a blade enclosure, which can hold multiple blade servers, providing services such as power, cooling, networking, various interconnects and management. Together, blades and the blade enclosure form a blade system, which may itself be rack-mounted. Different blade providers have differing principles regarding what to include in the blade itself, and in the blade system as a whole.

Green computing, green IT, or ICT sustainability, is the study and practice of environmentally sustainable computing or IT.

<span class="mw-page-title-main">Raised floor</span> Elevated floor above a solid substrate to create a void for mechanical and electrical services

A raised floor provides an elevated structural floor above a solid substrate to create a hidden void for the passage of mechanical and electrical services. Raised floors are widely used in modern office buildings, and in specialized areas such as command centers, Information technology data centers and computer rooms, where there is a requirement to route mechanical services and cables, wiring, and electrical supply. Such flooring can be installed at varying heights from 2 inches (51 mm) to heights above 4 feet (1.2 m) to suit services that may be accommodated beneath. Additional structural support and lighting are often provided when a floor is raised enough for a person to crawl or even walk beneath.

<span class="mw-page-title-main">Server room</span> Room containing computer servers

A server room is a room, usually air-conditioned, devoted to the continuous operation of computer servers. An entire building or station devoted to this purpose is a data center.

Liebert Corporation is a global manufacturer of power, precision cooling and infrastructure management systems for mainframe computer, server racks, and critical process systems. A subsidiary of Vertiv, It is headquartered in Columbus, Ohio, and employs more than 1,800 people across 12 manufacturing plants worldwide.

Dynamic Infrastructure is an information technology concept related to the design of data centers, whereby the underlying hardware and software can respond dynamically and more efficiently to changing levels of demand. In other words, data center assets such as storage and processing power can be provisioned to meet surges in user's needs. The concept has also been referred to as Infrastructure 2.0 and Next Generation Data Center.

Power usage effectiveness (PUE) is a ratio that describes how efficiently a computer data center uses energy; specifically, how much energy is used by the computing equipment.

IT energy management or Green IT is the analysis and management of energy demand within the Information Technology department in any organization. IT energy demand accounts for approximately 2% of global CO2 emissions, approximately the same level as aviation, and represents over 10% of all the global energy consumption. IT can account for 25% of a modern office building's energy cost.

<span class="mw-page-title-main">Converged infrastructure</span>

Converged infrastructure is a way of structuring an information technology (IT) system which groups multiple components into a single optimized computing package. Components of a converged infrastructure may include servers, data storage devices, networking equipment and software for IT infrastructure management, automation and orchestration.

<span class="mw-page-title-main">HP Performance Optimized Datacenter</span> Portable data centre

The HP Performance Optimized Datacenter (POD) is a range of three modular data centers manufactured by HP.

iDataCool is a high-performance computer cluster based on a modified IBM System x iDataPlex. The cluster serves as a research platform for cooling of IT equipment with hot water and efficient reuse of the waste heat. The project is carried out by the physics department of the University of Regensburg in collaboration with the IBM Research and Development Laboratory Böblingen and InvenSor. It is funded by the German Research Foundation (DFG), the German state of Bavaria, and IBM.

Energy Logic is a vendor-neutral approach to achieving energy efficiency in data centers. Developed and initially released in 2007, the Energy Logic efficiency model suggests ten holistic actions – encompassing IT equipment as well as traditional data center infrastructure – guided by the principles dictated by the "Cascade Effect."

<span class="mw-page-title-main">Immersion cooling</span> IT cooling practice

Immersion cooling is a thermal management technique, often applied as an IT cooling practice, by which electronic devices and IT components, including complete servers and storage devices, are submerged in a thermally conductive but electrically insulating dielectric liquid or coolant. Heat is removed from the system by circulating relatively cold liquid into direct contact with hot components, then circulating the now heated liquid through cool heat exchangers. Unlike many other applications, water cooling cannot be used as normal water is electrically conductive and will break electronic components. Fluids suitable for immersion cooling have electrically insulating properties to ensure that they can safely come into contact with energized electronic components.

<span class="mw-page-title-main">Close Coupled Cooling</span>

Close Coupled Cooling is a last generation cooling system particularly used in data centers. The goal of close coupled cooling is to bring heat transfer closest to its source: the equipment rack. By moving the air conditioner closer to the equipment rack a more precise delivery of inlet air and a more immediate capture of exhaust air is ensured.

<span class="mw-page-title-main">Green data center</span> Server facility which utilizes energy-efficient technologies

A green data center, or sustainable data center, is a service facility which utilizes energy-efficient technologies. They do not contain obsolete systems, and take advantage of newer, more efficient technologies.

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