Maintaining information in one or more virtual volume...

G - Physics – 06 – F

Patent

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G06F 3/06 (2006.01) G06F 12/12 (2006.01)

Patent

CA 2496784

Information is maintained in one or more virtual volume aggregates comprising a plurality of virtual volumes. A plurality of virtual volumes is maintained in a first information storage medium, and forms one or more virtual volume aggregates, where each of the of virtual volumes is assigned to one of the virtual volume aggregates. The method further provides a plurality of second information storage media. The method then identifies the least recently used virtual volume, and writes the virtual volume aggregate comprising that least recently used virtual volume to one or more second information storage media. Thereafter, the method determines if space is required on said first information storage medium. If space is required on said first information storage medium, the method selects the virtual volume aggregate comprising the least recently used virtual volume and removes from said first information storage medium each virtual volume in that selected virtual volume aggregate that has been written to one or more second information storage media.

Selon l'invention, des informations sont maintenues dans un ou plusieurs agrégats de volumes virtuels comprenant une pluralité de volumes virtuels. Ladite pluralité de volumes virtuels est maintenue dans un premier support de stockage d'informations, et forme un ou plusieurs agrégats de volumes virtuels, chaque volume virtuel étant attribué à un ou plusieurs agrégats de volumes virtuels. Le procédé comprend, de plus, une pluralité de seconds supports de stockage d'information. Ledit procédé identifie le volume virtuel utilisé le plus récemment et écrit l'agrégat de volume virtuel comprenant sur un ou plusieurs seconds supports de stockage d'informations. Puis, le procédé permet de déterminer si l'espace est nécessaire sur ledit premier support de stockage d'information. Si ledit espace est nécessaire sur le premier support de stockage d'informations, alors ledit procédé sélectionne l'agrégat de volumes virtuels comprenant le volume virtuel le plus récemment utilisé et élimine chaque volume virtuel du premier support de stockage d'informations, en agrégat de volume virtuel sélectionné qui a été écrit sur un ou plusieurs seconds supports de stockage d'informations.

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