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Optimizing replication by distinguishing user and system write activity

  • US 10,430,282 B2
  • Filed: 10/07/2014
  • Issued: 10/01/2019
  • Est. Priority Date: 10/07/2014
  • 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 the storage controller is configured to;

    perform a first replication operation that replicates stored data associated with a first logical grouping of data, wherein the first logical grouping of data corresponds to an indication of user write activity wherein user write activity updates a sequence number;

    subsequent to performing the first replication operation, perform a read optimization operation that remaps a portion of the first logical grouping of data to generate a second logical grouping of data, wherein a remapping for the stored data within the second logical grouping of data corresponds to an indication of system write activity, wherein system write activity does not update a sequence number;

    determining whether the remapping for the stored data within the second logical grouping of data corresponds to system write activity instead of user write activity; and

    in response to determining that the remapping for the stored data within the second logical grouping of data corresponds to system write activity instead of user write activity, prevent the stored data from being replicated during a second replication operation involving the second logical grouping of data through use of the sequence number.

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