Asynchronous mirroring in a storage area network

G - Physics – 06 – F

Patent

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Details

G06F 12/16 (2006.01) G06F 1/00 (2006.01) G06F 3/06 (2006.01) G06F 11/00 (2006.01) G06F 12/00 (2006.01)

Patent

CA 2457091

A method and a system for simultaneously mirroring of one or many data objects from one or many local storage devices to one or many remote storage devices. The one or many data objects may be used during mirroring. A mirroring functionality consists of the application of a succession of freeze and copy procedures repeated sequentially in successive mirroring cycles. Only the last local updated mirrored version is saved in the remote storage device(s). Each new updated version overwrites the previous version. Mirroring is performed asynchronously in the background by freezing and copying successive discrete blocks of data. The mirroring functionality is operable to perform more than one mirroring operation simultaneously as well as simultaneously cross- mirroring.

L'invention concerne un procédé et un système permettant un miroitage simultané d'un ou de plusieurs objets de données, à partir d'un ou de plusieurs dispositifs de stockage locaux, sur un ou plusieurs dispositifs de stockage éloignés. L'objet de données peut être utilisé pendant le miroitage. Une fonctionnalité de miroitage comprend l'application d'une succession de procédures de figeage et de copie, répétées de manière séquentielle dans des cycles de miroitage successifs. Seule la dernière version locale miroitée mise à jour est enregistrée dans le dispositif de stockage éloigné. Chaque nouvelle version mise à jour écrase la version précédente. Le miroitage s'effectue de manière asynchrone, en arrière plan, par figeage et copie de blocs de données discrets successifs. La fonctionnalité de miroitage peut servir à effectuer plus d'une opération de miroitage simultanément, ainsi qu'un miroitage croisé.

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