Single System Image

Single System Image

SSI (Single System Image): en un SSI todas las computadoras vinculadas dependen de un sistema operativo común, diseñado al efecto. En cambio, un grid es heterogéneo, en el sentido en que las computadoras pueden tener diferentes sistemas operativos.

Una imagen única de sistema (Single System Image, SSI) es una propiedad de un sistema que oculta la naturaleza heterogénea y distribuida de los recursos, y los presenta a los usuarios y a las aplicaciones como un recurso computacional unificado y sencillo. SSI significa que el usuario tiene una visión global de los recursos disponibles independientemente del nodo al que están físicamente asociados esos recursos. Además, SSI puede asegurar que un sistema continuará funcionando después de algún fallo (alta disponibilidad) así como asegurar que el sistema se cargue uniformemente y se provea de multiprocesamiento común (gestión y planificación de recursos).

Las metas más importantes que se persiguen en el diseño de un SSI son, principalmente, la completa transparencia en la gestión de recursos, escalabilidad, y la capacidad de soportar aplicaciones de usuario.

Algunos ejemplos de estos sistemas operativos son:

   * Amoeba (inactivo)
   * BProc
   * DragonFly BSD (meta a largo plazo)
   * Genesis
   * Kerrighed
   * Mosix/OpenMosix
   * Nomad (inactivo)
   * OpenSSI
   * Plurix
   * Sprite (inactivo)
   * TruCluster

Wikimedia foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Mira otros diccionarios:

  • Single-system image — In distributed computing, a Single system image cluster is a cluster of machines that appears to be one single system.Citation last = Pfister | first = Gregory F. year = 1998 title = In search of clusters isbn = 978 0138997090 publisher =… …   Wikipedia

  • Image rectification — is a transformation process used to project multiple images onto a common image surface. It is used to correct a distorted image into a standard coordinate system. *It is used in computer stereo vision to simplify the problem of finding matching… …   Wikipedia

  • System Prevalence — is a simple software architectural pattern that combines system images (snapshots) and transaction journaling to provide speed, performance scalability, transparent persistence and transparent live mirroring of computer system state. In a… …   Wikipedia

  • Single transferable vote — Part of the Politics series Electoral methods Single winner …   Wikipedia

  • Distributed operating system — A distributed operating system is the logical aggregation of operating system software over a collection of independent, networked, communicating, and spatially disseminated computational nodes.[1] Individual system nodes each hold a discrete… …   Wikipedia

  • Image-guided radiation therapy — (IGRT) is the process of frequent two and three dimensional imaging, during a course of radiation treatment, used to direct radiation therapy utilizing the imaging coordinates of the actual radiation treatment plan. The patient is localized in… …   Wikipedia

  • Single molecule electronics — is a branch of molecular electronics that uses single molecules as electronic components. Because single molecules constitute the smallest stable structures imaginable this miniaturization is the ultimate goal for shrinking electrical circuits.… …   Wikipedia

  • LOCUS (operating system) — Infobox OS name = LOCUS developer = UCLA family = Unix source model = Closed source working state = Historic kernel type = Monolithic kernel license = Proprietary LOCUS was a distributed operating system developed at UCLA during the 1980s. It was …   Wikipedia

  • Single-sideband modulation — (SSB) is a refinement of amplitude modulation that more efficiently uses electrical power and bandwidth. It is closely related to vestigial sideband modulation (VSB) (see below).Amplitude modulation produces a modulated output signal that has… …   Wikipedia

  • Image resolution — describes the detail an image holds. The term applies equally to digital images, film images, and other types of images. Higher resolution means more image detail. Image resolution can be measured in various ways. Basically, resolution quantifies …   Wikipedia

Compartir el artículo y extractos

Link directo
Do a right-click on the link above
and select “Copy Link”