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Parallel destaging with replicated cache pinning

  • US 9,535,840 B2
  • Filed: 02/18/2016
  • Issued: 01/03/2017
  • Est. Priority Date: 04/16/2013
  • Status: Expired due to Fees
First Claim
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1. A method, comprising:

  • identifying non-destaged first data in a write cache; and

    upon detecting second data in a master read cache;

    pinning the second data to the master and one or more backup read caches;

    calculating, using the first data stored in the write cache and the second data stored in the master read cache, one or more parity values; and

    destaging the first data and the one or more parity values;

    wherein destaging the first data and the one or more parity values comprises transferring the first data from the write cache to a data storage device, and storing the one or more parity values to one or more corresponding parity storage devices.

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