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Disaster recovery for high-bandwidth distributed archives

  • US 10,733,053 B1
  • Filed: 01/31/2018
  • Issued: 08/04/2020
  • Est. Priority Date: 01/31/2018
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • distributing erasure coded data to N storage systems at N sites so that the data is recoverable from N−

    1 storage systems at N−

    1 sites in case of failure of one of the N storage systems at one of the N sites, for N finite and greater than two;

    coordinating physical movement of one or more storage devices of a replacement storage system to each of the N−

    1 sites;

    transferring data for rebuilding the erasure coded data, from each of the N−

    1 storage systems to the one or more storage devices of the replacement storage system, at the N−

    1 sites, responsive to the failure of the one of the N storage systems;

    coordinating physical movement of the one or more storage devices of the replacement storage system to the one of the N sites or a further replacement site, to restore recoverability of the distributed archival storage in case of failure of one of the N storage systems; and

    constructing, in the one or more storage devices of the replacement storage system, at the N−

    1 sites, an index of where the erasure coded data is stored, based on the transferred data for the rebuilding the erasure coded data.

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