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Dual overlay query processing

  • US 10,698,890 B2
  • Filed: 09/17/2018
  • Issued: 06/30/2020
  • Est. Priority Date: 10/29/2014
  • Status: Active Grant
First Claim
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1. A method of processing a query at a plurality of storage devices, comprising:

  • receiving a dual query from a client;

    executing the dual query at a first storage device and a second storage device;

    receiving a result set of the dual query, wherein the result set includes a first set of database records from the first storage device and a second set of database records from the second storage device;

    identifying a first set of database records that has not been used above a first threshold number of times within a first time period;

    copying the first set stored in the first storage device to a second storage device;

    removing the copied database records of the first set from the first storage device;

    identifying a second set of database records that has been used above a second threshold number of times within a second time period, wherein the second set is stored in the second storage device;

    copying the second set stored in the second storage device to the first storage device; and

    removing the copied database records of the second set from the second storage device.

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