Copying volumes between storage pools
First Claim
1. A method, comprising:
- defining a source data volume comprising a first multiple of source snapshots;
storing the first multiple of the source snapshots in a first storage pool comprising a second multiple of storage regions having respective identifiers;
receiving a request to copy the source data volume to a target data volume in a second storage pool;
accessing a first given source snapshot comprising a first set of the storage regions;
identifying, by a module processor, a second given source snapshot preceding the first given source snapshot, the second given source snapshot comprising a second set of the storage regions;
identifying a set difference of the second set and the first set of the storage regions;
storing respective identifiers of the set difference to the target volume, andcreating a target snapshot for the target data volume in the second storage pool.
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Accused Products
Abstract
Methods, apparatus and computer program products implement embodiments of the present invention that include defining a source data volume including a first multiple of source snapshots, and storing the first multiple of the source snapshots in a first storage pool including a second multiple of storage regions having respective identifiers. Upon receiving a request to copy the source data volume to a target data volume in a second storage pool, a first given source snapshot including a first set of the storage regions is accessed, and a second given source snapshot preceding the first given source snapshot is identified, the second given source snapshot including a second set of the storage regions. A set difference of the second and the first sets of the storage regions is identified, respective identifiers of the set difference are stored to the target volume, and a target snapshot is created for the target volume.
53 Citations
20 Claims
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1. A method, comprising:
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defining a source data volume comprising a first multiple of source snapshots; storing the first multiple of the source snapshots in a first storage pool comprising a second multiple of storage regions having respective identifiers; receiving a request to copy the source data volume to a target data volume in a second storage pool; accessing a first given source snapshot comprising a first set of the storage regions; identifying, by a module processor, a second given source snapshot preceding the first given source snapshot, the second given source snapshot comprising a second set of the storage regions; identifying a set difference of the second set and the first set of the storage regions; storing respective identifiers of the set difference to the target volume, and creating a target snapshot for the target data volume in the second storage pool. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A storage system, comprising:
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a storage device comprising a first multiple of storage regions having respective identifiers; and a module processor configured; to define a source data volume comprising a second multiple of source snapshots, to store the second multiple of the source snapshots in a first storage pool comprising a third multiple of the storage regions, to receive a request to copy the source data volume to a target data volume in a second storage pool, to access a first given source snapshot comprising a first set of the storage regions, to identify a second given source snapshot preceding the first given source snapshot, the second given source snapshot comprising a second set of the storage regions, to identify a set difference of the second set and the first set of the storage regions, to store the respective identifiers of the set difference to the target volume, and to create a target snapshot for the target data volume in the second storage pool. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A computer program product, the computer program product comprising:
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a non-transitory computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising; computer readable program code configured to define a source data volume comprising a first multiple of source snapshots; computer readable program code configured to store the first multiple of the source snapshots in a first storage pool comprising a second multiple of storage regions having respective identifiers; computer readable program code configured to receive a request to copy the source data volume to a target data volume in a second storage pool; computer readable program code configured to access a first given source snapshot comprising a first set of the storage regions; computer readable program code configured to identify a second given source snapshot preceding the first given source snapshot, the second given source snapshot comprising a second set of the storage regions; computer readable program code configured to identify a set difference of the second set and the first set of the storage regions; computer readable program code configured to store the respective identifiers of the set difference to the target volume, and computer readable program code configured to create a target snapshot for the target data volume in the second storage pool. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification