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Tape drive library integrated memory deduplication

  • US 10,289,335 B2
  • Filed: 09/12/2017
  • Issued: 05/14/2019
  • Est. Priority Date: 09/12/2017
  • Status: Active Grant
First Claim
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1. A tape drive memory storage improvement method comprising:

  • receiving, by a processor of a storage tape drive hardware device of a storage tape drive hardware library system comprising a plurality of storage tape drive hardware devices, a data stream for storage, wherein said storage tape drive hardware device internally comprises a deduplication software engine, a non-volatile memory device (NVS1), a non-volatile memory device (NVS2), and a first data storage tape cartridge;

    identifying, by said processor within said NVS2, duplicate data chunks of a plurality of adjacent variable length data chunks of said data stream, wherein said duplicate data chunks comprise duplicated data with respect to a first group of data chunks of said plurality of adjacent variable length data chunks;

    deleting, by said processor from said NVS2, said duplicate data chunks such that said first group of data chunks remain within said NVS2;

    writing, by said processor to a first data storage tape cartridge of said storage tape drive hardware device, said first group of data chunks;

    generating, by said processor, pointers associated with a location within said NVS1 storing de-duplication hashes identifying each data chunk of said first group of data chunks stored within said first data storage tape cartridge;

    storing, by said processor, said pointers within said first data storage tape cartridge;

    writing, by said processor from said NVS1 to a manager non-volatile memory device (MNVS) of said storage tape drive hardware library system, said de-duplication hashes; and

    updating, by said processor, said MNVS by combining said de-duplication hashes with a plurality of additional de-duplication hashes identifying a plurality of commonly used de-duplicated data chunks stored within said plurality of storage tape drive hardware devices.

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