Publication: Planificación y diseño de un CPD de respaldo basado en la norma ANSI TIA 942
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2014-04
Defense date
2014-04-22
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Abstract
Año tras año la dependencia de las organizaciones en las TIC aumenta, hasta el punto de
que no se puede concebir la operación de la organización en ausencia de la
infraestructura TIC. Esta dependencia significa a su vez una gran exigencia en el
funcionamiento ininterrumpido de los sistemas, los profesionales y la infraestructura
que los soportan, ya que cualquier fallo tiene un impacto negativo en la operación.
En este sentido las áreas de TI garantizan unos niveles de calidad del servicio,
normalmente medidos en % de tiempo de disponibilidad de los sistemas individuales.
Sin embargo, esta disponibilidad depende no solo del sistema individual, sino también
de la plataforma TIC que la sustenta, y más específicamente, del centro de proceso de
datos en la que el sistema se aloja. Es por tanto necesario analizar el centro de proceso
de datos como único sistema compuesto de múltiples subsistemas complejos,
identificando cuales son los posibles fallos que pueden llevar a indisponibilidad del
sistema como un todo. Con estos fallos identificados es posible diseñar el centro de
datos-sistema y sus componentes minimizando los riesgos de interrupciones no
deseadas.
En esta tarea existen múltiples subsistemas y decisiones de diseño que deben ser
tomadas en un amplio grupo de áreas de conocimiento, no sólo a nivel de diseño de
redes y sistemas informáticos, sino también a nivel arquitectónico, de seguridad,
infraestructura de energía o enfriamiento, entre otros. Esta tarea se ve simplificada
gracias a la norma TIA-942, que establece una serie de reglas a seguir en el diseño de
los diferentes subsistemas del centro de datos en función del nivel de disponibilidad
deseada (diferenciando cuatro niveles o Tiers, desde Tier 1 hasta Tier 4).
Este proyecto analiza la norma, y la aplica un caso práctico siguiendo el diseño de un
centro de datos para la empresa ZEREPSA, cumpliendo los requisitos de la norma para
un centro Tier 4. Este centro será un centro de respaldo para el centro principal de la
compañía, lo que permite abordar algunos asuntos adicionales, como racionalización de
los recursos y conectividad de con el centro de datos principal y otras sedes de la
compañía.
Year by year reliance of organizations on Information Technologies keeps growing, up to not being able to foresee the organization's business operations in the absence of IT infrastructures. This reliance implies great strain on the systems, infrastructure and people supporting these systems in order to achieve uninterrupted system operation, as any fault will have negative impact on the business. TI departments guarantee certain service levels, usually measured as individual system uptime. This uptime, however depends not only on the specific system, but also on the IT platform underneath, and explicitly on the datacenter where the system resides. So it is necessary to analyze such datacenter as an unique complex system made up by multiple and complex subsystems, identifying which points of failure could cause downtime for the whole system. By identifying these points of failure, it is possible to design the datacenter/system and its components minimizing undesired downtimes. Into that task, multiple subsystem and design considerations must be taken care of, across many knowledge areas, not only on network and computing systems but also on architectural, security, power and cooling, for instance. The task can be simplified by using the TIA-942 standard, that establishes a set of guidelines to be followed for each subsystem based on the desired availability (classified as four Tiers, ranging from Tier 1 to Tier 4). This project analyzes the standard, applying it into a practical case by following the design od a datacenter for the ZEREPSA company, achieving the Tier 4 datacenter requirements described in the standard. The mentioned datacenter will be a backup for the primary site, allowing the analysis of additional concepts, as resource optimization and connectivity with the primary datacenter and with other offices.
Year by year reliance of organizations on Information Technologies keeps growing, up to not being able to foresee the organization's business operations in the absence of IT infrastructures. This reliance implies great strain on the systems, infrastructure and people supporting these systems in order to achieve uninterrupted system operation, as any fault will have negative impact on the business. TI departments guarantee certain service levels, usually measured as individual system uptime. This uptime, however depends not only on the specific system, but also on the IT platform underneath, and explicitly on the datacenter where the system resides. So it is necessary to analyze such datacenter as an unique complex system made up by multiple and complex subsystems, identifying which points of failure could cause downtime for the whole system. By identifying these points of failure, it is possible to design the datacenter/system and its components minimizing undesired downtimes. Into that task, multiple subsystem and design considerations must be taken care of, across many knowledge areas, not only on network and computing systems but also on architectural, security, power and cooling, for instance. The task can be simplified by using the TIA-942 standard, that establishes a set of guidelines to be followed for each subsystem based on the desired availability (classified as four Tiers, ranging from Tier 1 to Tier 4). This project analyzes the standard, applying it into a practical case by following the design od a datacenter for the ZEREPSA company, achieving the Tier 4 datacenter requirements described in the standard. The mentioned datacenter will be a backup for the primary site, allowing the analysis of additional concepts, as resource optimization and connectivity with the primary datacenter and with other offices.
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Keywords
Organizaciones, Tecnologías de la información y las comunicaciones, TIC, Centro de proceso de datos, CPD, Normas, ANSI TIA 942