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Data center

Data center
An operation engineer overseeing a network operations control room of a data center A data center is a facility used to house computer systems and associated components, such as telecommunications and storage systems. It generally includes redundant or backup power supplies, redundant data communications connections, environmental controls (e.g., air conditioning, fire suppression) and various security devices. Large data centers are industrial scale operations using as much electricity as a small town[1] and sometimes are a significant source of air pollution in the form of diesel exhaust.[2] History[edit] Data centers have their roots in the huge computer rooms of the early ages of the computing industry. The boom of data centers came during the dot-com bubble. With an increase in the uptake of cloud computing, business and government organizations are scrutinizing data centers to a higher degree in areas such as security, availability, environmental impact and adherence to standards.

http://en.wikipedia.org/wiki/Data_center

N+1, 2N diagrams Power Distrubution Units Power Distribution Units (PDUs) for Data Centers. Servers and Communications The distribution of clean un-interrupted power is a basic critical requirement for virtually all systems. NAAT can help you evaluate your requirements and design and supply the appropriate power system for your application. NAAT is an authorized partner of virtually all major vendors of UPS and Power Distribution products.

Big data Visualization of daily Wikipedia edits created by IBM. At multiple terabytes in size, the text and images of Wikipedia are an example of big data. Growth of and Digitization of Global Information Storage Capacity Source Client-side scripting By viewing the file that contains the script, users may be able to see its source code. Many web authors learn how to write client-side scripts partly by examining the source code for other authors' scripts. Due to security restrictions, client-side scripts may not be allowed to access the user's computer beyond the web browser application. Techniques like ActiveX controls can be used to sidestep this restriction. Network-attached storage Network-attached storage (NAS) is file-level computer data storage connected to a computer network providing data access to a heterogeneous group of clients. NAS not only operates as a file server, but is specialized for this task either by its hardware, software, or configuration of those elements. NAS is often manufactured as a computer appliance – a specialized computer built from the ground up for storing and serving files – rather than simply a general purpose computer being used for the role.[nb 1]

What is N+1 UPS? Definition from WhatIs N+1, also called parallel redundancy, is a safeguard to ensure that an uninterruptible power supply (UPS) system is always available. N+1 stands for the number of UPS modules that are required to handle an adequate supply of power for essential connected systems, plus one more. If an enterprise data center uses a single large UPS, and that module fails, systems will be disrupted. In an N+1 scheme, multiple small UPS modules and batteries are integrated together. During normal operations, the load is shared equally across all modules, which behave as if they were a single large UPS device.

List of Linux distributions Timeline representing the development of various Linux distributions. This page provides general information about notable Linux distributions in the form of a categorized list. Distributions are organized into sections by the major distribution they are based on, or the package management system they are based around. Debian-based[edit] Knoppix-based[edit] Java applet A Java applet that was created as supplementary demonstration material for a scientific publication.[1] Using applet for nontrivial animation illustrating biophysical topic (randomly moving ions pass through voltage gates)[3] Using a Java applet for computation - intensive visualization of the Mandelbrot set[4] Sufficient running speed is also utilized in applets for playing nontrivial computer games like chess[5] NASA World Wind (open source) is a second generation applet[6] that makes heavy use of OpenGL and on-demand data downloading to provide a detailed 3D map of the world. Web access to the server console at the hardware level with the help of a Java applet

Server (computing) A server is a system (software and suitable computer hardware) that responds to requests across a computer network to provide, or help to provide, a network service. Servers can be run on a dedicated computer, which is also often referred to as "the server", but many networked computers are capable of hosting servers. In many cases, a computer can provide several services and have several servers running. Servers often provide essential services across a network, either to private users inside a large organization or to public users via the Internet. Typical computing servers are database server, file server, mail server, print server, web server, gaming server, and application server.[2] Numerous systems use this client / server networking model including Web sites and email services.

Five tips for N+1 uninterruptible power supply (UPS) design N+1 redundancy (or parallel redundancy) is a safeguard to ensure a UPS system's availability in the event of component failure — especially in a tier 2 or a tier 3 datacenter. When considering an N+1 UPS configuration, it's essential to keep in mind that the UPS' specifications should be outlined keeping in mind criticality of applications rather than the data center's size. When it comes to the UPS, it is not enough to have redundancy built into just a single system. In India, many data centers still use legacy systems. N+1 UPS can be achieved in such systems using static transfer switches (STS).

Search engine indexing Popular engines focus on the full-text indexing of online, natural language documents.[1] Media types such as video and audio[2] and graphics[3] are also searchable. Meta search engines reuse the indices of other services and do not store a local index, whereas cache-based search engines permanently store the index along with the corpus. Unlike full-text indices, partial-text services restrict the depth indexed to reduce index size. Larger services typically perform indexing at a predetermined time interval due to the required time and processing costs, while agent-based search engines index in real time. Indexing[edit] The Growing Importance of Client Side Programming Web design and development is an ever-changing landscape with the core focus of attracting users. Whether those users are customers or subscribers, our goal as developers / designers is to captivate them and keep them on the site to do what we need them to do. We have seen the web trends shift from simple forms and store fronts to complex websites with many options (that often confuse users). Basically the web is trying to find a balance to keep users happy while still giving them all the tools to get what they need done.

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