Full allocation volume to deduplication volume migration in a storage system

A system for full allocation volume to deduplication volume migration in a storage system including a processor and a memory configured to provide computer program instructions to the processor to execute the function of the components, the system comprising:

• a physical allocation moving component in a virtualization layer for moving a physical allocation of stored data associated with a full allocation volume into a virtual address range in a deduplication domain;
• a deduplication metadata setting up component for setting up the deduplication metadata to be a passthrough, wherein setting up the deduplication metadata to be a passthrough includes:
• creating a passthrough forward lookup structure for assimilation of the fully allocated volume to the deduplicated volume;
• and creating a stub backward lookup structure to be updated with deduplication metadata as the deduplicated volume is deduplicated;
• and
• a deduplication component of a deduplication layer for performing a background deduplication process on the virtual address range once populated with the physical allocations using a drive query hash interface to perform hash calculations on physical drives at which the data is stored, wherein the virtual address range becomes a deduplicated volume for the data.

A computer program product for full allocation volume to deduplication volume migration in a storage system, the non-transitory computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to:

• move a physical allocation of stored data associated with a full allocation volume into a virtual address range in a deduplication domain and set up the deduplication metadata to be a passthrough, wherein setting up the deduplication metadata to be a passthrough includes:
• creating a passthrough forward lookup structure for assimilation of the fully allocated volume to the deduplicated volume;
• and creating a stub backward lookup structure to be updated with deduplication metadata as the deduplicated volume is deduplicated;
• and
• perform a background deduplication process on the virtual address range once populated with the physical allocations using a drive query hash interface to perform hash calculations on physical drives at which the data is stored, wherein the virtual address range becomes a deduplicated volume for the data.