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Read optimization operations in a storage system

  • US 9,864,761 B1
  • Filed: 08/08/2014
  • Issued: 01/09/2018
  • Est. Priority Date: 08/08/2014
  • Status: Active Grant
First Claim
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1. A system comprising:

  • one or more storage devices; and

    a storage controller coupled to the one or more storage devices, wherein responsive to selecting a dataset to be read optimized, the storage controller is configured to;

    identify metadata associated with the dataset, wherein the metadata includes;

    an active logical grouping of data that is in a read-write state and corresponds to an anchor logical grouping of data; and

    non-active logical groupings of data that are in a read-only state and correspond to one or more logical data groupings which underlie the anchor logical grouping of data;

    based on the metadata associated with the dataset, select one or more of the non-active logical groupings of data for a read optimization operation; and

    perform a user operation on the dataset using the active logical grouping of data that is in the read-write state, while simultaneously;

    performing the read optimization operation on the selected one or more non-active logical groupings of data by reducing the number of mappings within the non-active logical groupings of data; and

    preventing the read optimization operation from being performed on the active logical grouping of data in the read-write state.

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