Interface for management of data movement in a thin provisioned storage system

摘要

A computational device receives a request to copy a source logical block of a thin provisioned source logical unit to a target logical block of a thin provisioned target logical unit, wherein in thin provisioned logical units physical storage space is allocated in response to a write operation being performed but not during creation of the thin provisioned logical units. The computational device generates metadata that stores a correspondence between the source logical block and the target logical block, while avoiding allocating any physical storage space for the target logical block in the thin provisioned target logical unit.

主权项

1. A method, comprising:
generating, by a computational device, metadata that stores a correspondence between a source logical block of a thinly provisioned source logical unit and a target logical block of a thinly provisioned target logical unit, without physically moving data from the thinly provisioned source logical unit to the thinly provisioned target logical unit, wherein an application programming interface is used to remap physical storage, and wherein the application programming interface is comprised of parameters including a source logical unit number, a source logical block address, a target logical unit number, a target logical block address, and a size; and in response to a reconfiguration of the thinly provisioned source logical unit and the thinly provisioned target logical unit as fully provisioned, physically copying data stored in the source logical block of the thinly provisioned source logical unit that is now a fully provisioned source storage unit to the target logical block of the thinly provisioned target logical unit that is now a fully provisioned target storage unit.