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/usr/home/minubeinformatica.com/web/clases/tools/logs.php on line 47 Warning: file_put_contents(): Only 0 of 99 bytes written, possibly out of free disk space in /usr/home/minubeinformatica.com/web/clases/tools/logs.php on line 47La virtualización es la creación -a través de software- de una versión virtual de algún recurso tecnológico, como puede ser una plataforma de hardware, un sistema operativo, un dispositivo de almacenamiento u otros recursos de red.
Tanto en el mundo empresarial como para los usuarios domésticos la virtualización lo está invadiendo todo porque aporta numerosas ventajas como el ahorro de costes energéticos, de hardware, de mantenimiento…
La virtualización es la mejor opción para el iniciarse en el aprendizaje de sistemas operativos distintos al que tenemos instalado en nuestro ordenador o para la evaluación de programas en desarrollo cuando no se dispone de equipos físicos con los que realizar las pruebas.
En entornos de escritorio es utilizada para crear equipos completos por medio de la virtualización de segundo nivel.
Podemos encontrarnos con dos tipos de virtualización:
También denominado nativo, unhosted o bare metal (sobre el metal desnudo), el software de virtualización se instala directamente en el equipo anfitrión sin la necesidad de un SO previo, y se ejecuta directamente sobre el hardware.
Para cada máquina se crea una capa de virtualización que emula todos los componentes hardware (memoria, procesador, discos, puertos, etc.) que necesitan las máquinas virtuales para funcionar. De esta manera cada una de las máquinas que se vayan creando, utilizarán los recursos hardware del anfitrión (capa de hardware real) como si fueran parte de su propio sistema.
Cada una de las máquinas dispone de recursos hardware sobre los que poder instalar el SO y las aplicaciones de usuario.
También denominado hosted, el software de virtualización se instala y ejecuta sobre el SO del equipo anfitrión.
Al igual que en el de 1er nivel cada una de las máquinas virtuales creadas utiliza una capa de virtualización de hardware, para emular los componentes hardware necesarios para su funcionamiento.
La principal diferencia entre los dos niveles de virtualización es que el de 2º nivel precisa de un interlocutor (SO del equipo anfitrión) para comunicarse con el hardware del anfitrión.
Al reducir el número de máquinas físicas se reduce tanto su consumo eléctrico como su mantenimiento, que habitualmente supera el coste de la propia máquina.
La virtualización reduce los tiempos de parada tanto planificados como no planificados, aumentando la productividad..
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