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Centralized, quorum-aware handling of device reservation requests in a storage system

  • US 10,719,265 B1
  • Filed: 12/08/2017
  • Issued: 07/21/2020
  • Est. Priority Date: 12/08/2017
  • Status: Active Grant
First Claim
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1. A method for device reservations in a storage system, performed by the storage system, comprising:

  • maintaining a list of a plurality of storage devices of the storage system or slots for the storage devices, and a status of each of the plurality of storage devices or slots for the storage devices;

    determining whether granting a request for a reservation of one of the plurality of storage devices or slots would result in the storage system having less than a quorum of online storage devices, wherein the reservation causes a storage controller of the storage system to prevent other storage controllers of the storage system from accessing the one of the plurality of storage devices or slots, the quorum of online storage devices represented by a number of storage devices that are able to write and read user data using erasure coding; and

    granting or rejecting the reservation, based on the determining.

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