Patent ID: 8856471
Filing Date: 2014-10-07
Classification: G06F

Abstract:
1. A method for providing a warranted snapshot, the method comprises: receiving a request to create a first warranted snapshot of a first logical volume at a first point in time; creating the first warranted snapshot if the first warranted snapshot is non-writable and if (a) an amount of physical storage actually devoted by a storage system to the first logical volume at the first point of time does not exceed (b) a size of a free physical storage space that is available for storing any future data delta associated with the first warranted snapshot; wherein the creating of the first warranted snapshot comprises allocating a first virtual portion of a physical storage space that comprises the free physical storage space for storing any future data delta associated with the first warranted snapshot; wherein a size of the first virtual portion equals the amount of physical storage actually devoted to the first logical volume at the first point of time.