Patent ID: 8572338
Filing Date: 2013-10-29
Classification: G06F

Abstract:
1. A computer-implemented method for creating space-saving snapshots, at least a portion of the method being performed by a computing device comprising at least one processor, the method comprising: identifying a parent volume on which to perform a snapshot; allocating at least one thin-provisioned volume for the snapshot, wherein the thin-provisioned volume logically presents more storage space than is physically allocated to the thin-provisioned volume; identifying an attempt to write to a region of the parent volume; copying the region to a logical address on the thin-provisioned volume that is equivalent to the region's logical address on the parent volume without maintaining a dynamic map between the parent volume and the thin-provisioned volume that identifies the logical address of the copied region on the thin-provisioned volume; wherein the logical address space of the parent volume and the logical address space of the thin-provisioned volume are isomorphic.