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:
receiving, by a computational device, 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; and generating, by the computational device, metadata that stores a correspondence via a pointer between the source logical block and the target logical block, without physically moving data from the thin provisioned source logical unit to the thin provisioned target logical unit; performing a read operation of the target logical block by accessing the source logical block from the correspondence maintained in the metadata; and in response to a reconfiguration of the thin provisioned source logical unit or the thin provisioned target logical unit as fully provisioned, physically copying data stored in the source logical block to the target logical block.