File system primitive providing native file system support...

G - Physics – 06 – F

Patent

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G06F 7/00 (2006.01) G06F 3/06 (2006.01) G06F 13/10 (2006.01)

Patent

CA 2291000

In order to decrease the overall cost of storing large amounts of data, systems have been developed that use a hierarchy of storage devices from fast local disks ( 118) to archival off-line storage (122). Such storage devices (118, 122) may be managed in a hierarchy where data that is accessed only infrequently can be moved to archival storage (122). The present invention relies on a tight integration of a hierarchical storage manager (110) into the I/O system so that remotely stored attributes (112) can be identified and tracked internally to the I/O system just like any other attributes. Implementations of the present invention may relay on a layered driver model where lower level drivers (104) detect the existence of files with remotely stored attributes (112) and then transfer control for processing I/O requests involving files with remotely stored attributes (112) to higher level drivers (100). The higher level drivers (100) then assume control to finish processing the I/O request.

Afin de réduire le coût total du stockage de grosses quantités de données, on a mis au point des systèmes utilisant une hiérarchie de dispositifs de stockage allant des disques rapides locaux (118) au stockage d'archives hors ligne (122), ces dispositifs de stockage (118, 122) pouvant être gérés hiérarchiquement pour que les données d'accès peu fréquemment utilisées soient transférées au stockage d'archives (122). L'invention se base sur l'intégration poussée d'un gestionnaire (110) de stockage hiérarchisé au système d'E/S permettant d'identifier et de suivre à l'intérieur du système d'E/S les éléments stockés à distance (112) au même titre que les autres. Les exécutions de l'invention peuvent suivre un modèle d'unités de disques empilées dont celles de rang inférieur (104) détectent l'existence de fichiers contenant des éléments stockés à distance (112) puis transfèrent à des unités de rang plus élevé (100) la commande de traitement des demandes d'E/S relatives aux fichiers contenant des éléments stockés à distance (112). Les unités de rang plus élevé (100) se chargent alors d'achever le traitement des demandes d'E/S.

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