Simplified copy offload

摘要

Methods and apparatuses for performing simplified copy offload operations are provided. In one exemplary embodiment, a method includes creating a persistent point-in-time image of a data set of a source storage device in response to receiving a token request for a copy offload operation from a host. Creating the persistent point-in-time image includes generating pointers to data blocks of the data set, but does not include duplicating the data blocks. The method also includes transmitting a token that is a representation of the persistent point-in-time image to the host in response to the request.

主权项

1. A method comprising:
in response to receiving a token request for a copy offload operation from a host, creating a persistent point-in-time image of a data set of a source storage device, wherein the creating includes generating pointers to data blocks of the data set and does not include duplicating the data blocks; transmitting a token that is a representation of the persistent point-in-time image to the host in response to the request; and writing to the data set without affecting the persistent point-in-time image and the token, wherein writing to the data set includes storing new data associated with the writing in different physical locations of the source data storage device than are used for the data blocks and leaving the data blocks unchanged.