Deduplication and garbage collection across logical databases

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United States of America Patent

PATENT NO 10853242
APP PUB NO 20170249246A1
SERIAL NO

15521618

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Abstract

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In some examples, a plurality of nodes may each host a respective logical database (LDB) that includes database data that references external resources stored in a storage system. Further, each node may maintain, for each external resource referenced by the respective LDB on that node, a reference count of a number of references in the respective LDB to each external resource and a timestamp associated with the reference count. In response to addition of a reference to a particular external resource in a particular LDB, a node that hosts the particular LDB may be programmed to increment the reference count and update the timestamp for the particular external resource. Similarly, in response to removal of the reference to the particular external resource in the particular LDB, the node hosting the particular LDB is programmed to decrement the reference count and update the timestamp for the particular external resource.

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Patent Owner(s)

  • HITACHI VANTARA LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bryant, Alan East Walpole, US 2 30
Cooper, Robert Somerville, US 22 1723
Kulma, Marty Auburn, US 4 30
Wohler, Walter Leominster, US 6 35

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