Efficient transfer of deduplicated data

A method in a computer system for performing an efficient transfer of deduplicated data within a storage management system, comprising:

• dividing a data object within a storage management system into one or more data chunks;
• storing the one or more data chunks in a source storage pool of a plurality of storage pool within the storage management system, wherein volumes of each storage pool share a characteristic and are separate from volumes of other storage pools;
• deduplicating the one or more data chunks within one or more of the plurality of storage pools;
• tracking a location of the data chunks in the storage pools with first entries for the data chunks in a storage index, wherein each first entry specifies each storage pool storing the associated data chunk;
• tracking storage information for the data chunks of the data object in a deduplication index at a storage management system level;
• adding second entries for the data chunks from the deduplication index to the storage index if the target storage pool is deduplicated in response to transferring the data object from the source storage pool to the target storage pool, wherein each second entry specifies that the source storage pool stores the associated data chunk;
• and
• transferring only each data chunk of the data object to the target storage pool that satisfies three condition comprising the target storage pool is a deduplicating pool, the data chunk is without a first entry in the storage index specifying that the target source stores the data chunk, and a second entry for the data chunk in the storage index specifies the source storage pool stores the data chunk.

A system, comprising:

• at least one processor;
• and
• at least one memory which stores instructions operable with the at least one processor for performing an efficient transfer of de duplicated data within a storage management system, the instructions being executed for:
• deduplicating a data object within a storage management system into one or more deduplicated data chunks,
• storing the data chunks in a source storage pool, the storage management system containing a plurality of storage pools, wherein volumes of each storage pool share a characteristic and are separate from volumes of other storage pools;
• tracking a location of the data chunks in the storage pools with first entries for the data chunks in a storage index, wherein each first entry specifies each storage pool storing the associated data chunk;
• tracking deduplication information for the data chunks of the data object in a deduplication index at a storage management system level;
• adding second entries for the data chunks from the deduplication index to the storage index if the target storage pool is deduplicated in response to transferring the data object from the source storage pool to the target storage pool, wherein each second entry specifies that the source storage pool stores the associated data chunk;
• and
• transferring only each data chunk of the data object to the target storage pool that satisfies three conditions comprising the target storage pool is a deduplicating pool, the data chunk is without a first entry in the storage index specifying that the target source stores the data chunk, and a second entry for the data chunk in the storage index specifies the source storage pool stores the data chunk.

A system, comprising:

• at least one processor;
• and
• at least one memory which stores instructions operable with the at least one processor for performing an efficient transfer of deduplicated data within a storage management system, the instructions being executed for:
• dividing a data object within a storage management system into one or more data chunks;
• storing the one or more data chunks onto a source storage pool of a plurality of storage pools within the storage management system, wherein volumes of each storage pool share a characteristic and are separate from volumes of other storage pools;
• deduplicating the one or more data chunks within one or more of the plurality of storage pools;
• tracking a location of the data chunks in the storage pools with first entries for the data chunks in a storage index, wherein each first entry specifies each storage pool storing the associated data chunk;
• tracking storage information for the data chunks of the data object in a deduplication index at a storage management system level;
• adding second entries for the data chunks from the deduplication index to the storage index if the target storage pool is deduplicated in response to transferring the data object from the source storage pool to the target storage pool, wherein each second entry specifies that the source storage pool stores the associated data chunk;
• and
• transferring only each data chunk of the data object to the target storage pool that satisfies three conditions comprising the target storage pool is a deduplicating pool, the data chunk is without a first entry in the storage index specifying that the target source stores the data chunk, and a second entry for the data chunk is the storage index specifies the source storage pool stores the data chunk.

A computer program product comprising a non-transitory computer useable medium having a computer readable program for performing an efficient transfer of deduplicated data within a storage management system, wherein the computer readable program when executed on a computer causes the computer to:

• deduplicate a data object within a storage management system into one or more deduplicated data chunks;
• storing the data chunks in a source storage pool, the storage management system comprising a plurality of storage pools, wherein volumes of each storage pool share a characteristic and are separate from volumes of other storage pools;
• tracking a location of the data chunks in the storage pools with first entries for the data chunks in a storage index, wherein each first entry specifies each storage pool storing the associated data chunk;
• tracking deduplication information for the data chunks of the data object in a deduplication index at a storage management system level;
• adding second entries for the data chunks from the deduplication index to the storage index if the target storage pool is deduplicated in response to transferring the data object from the source storage pool to the target storage pool, wherein each second entry specifies that the source storage pool stores the associated data chunk;
• and
• transferring only each data chunk of the data object to the target storage pool that satisfies three conditions comprising the target storage pool is a deduplicating pool, the data chunk is without a first entry in the storage index specifying that the target source stores the data chunk, and a second entry for the data chunk in the storage index specifies the source storage pool stores the data chunk.

A computer program product comprising a non-transitory computer useable medium having a computer readable program for performing an efficient transfer of deduplicated data within a storage management system, wherein the computer readable program when executed on a computer causes the computer to:

• divide a data object within a storage management system into one or more data chunks;
• store the one or more data chunks onto a source storage pool of a plurality of storage pools within the storage management system, wherein volumes of each storage pool share a characteristic and are separate from volumes of other storage pools;
• deduplicate the one or more data chunks within one or more of the plurality of storage pools;
• track a location of the data chunks in the storage pools with first entries for the data chunks in a storage index, wherein each first entry specifies each storage pool storing the associated data chunk;
• track storage information for the data chunks of the data object in a deduplication information index at a storage at a storage management system level;
• adding second entries for the data chunks from the deduplication index to the storage index if the target storage pool is deduplicated in response to transferring the data object from the source storage pool to the target storage pool, wherein each second entry specifies that the source storage pool stores the associated data chunk;
• and
• transferring only each data chunk of the data object to the target storage pool that satisfies three conditions comprising the target storage pool is a deduplicating pool, the data chunk is without a first entry in the storage index specifying that the target source stores the data chunk, and a second entry for the data chunk in the storage index specifies the source storage pool stores the data chunk.