Patent ID: 9582206
Date: 2017-02-28
CPC Classifications: G06F

Claim:
1. A machine implemented method, comprising: determining if content of a source data container can be changed, after the source data container is opened for a copy-offload operation having an offload read operation and an offload write operation to copy the source data container from a source location to a destination location; wherein to execute an offload read request, a storage system that manages a storage device returns a token to a client in response to the offload read request, where the token represents the content of the source data container; using a direct copy mode for generating the token for the offload read operation, without taking a point in time image of the source data container, when the content cannot be changed based on a mode in which the source data container is opened; and selecting a point in time copy mode by taking the point in time image of the source data container for generating the token, when the content can be changed; wherein the token created in direct copy mode differs from the token created in the point in time copy mode.