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Resilient distributed storage system

  • US 10,146,652 B2
  • Filed: 02/11/2016
  • Issued: 12/04/2018
  • Est. Priority Date: 02/11/2016
  • Status: Active Grant
First Claim
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1. A data storage system;

  • comprising;

    a plurality of data storage centers, each comprising;

    a set of storage units;

    an encoder configured to encode local protection information and global protection information;

    a parity map data structure configured to dynamically identify which data storage centers in the plurality of data storage centers participate in a given parity group;

    a content map data structure configured to identify where among the plurality of data storage centers that data is stored and how to recover the data when a given data storage center is unreachable; and

    a buffer configured to temporarily store data prior to loading into the set of storage units,wherein the data is moved asynchronously between the plurality of data storage centers, parity for the plurality of data storage centers is maintained asynchronously by at least one parity data storage center, and each of the plurality of data storage centers is configured to issue a parity read command.

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