COPYING VOLUMES BETWEEN STORAGE POOLS

摘要

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, and respective identifiers of the set difference are stored to the target volume.

主权项

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; and storing respective identifiers of the set difference to the target volume.