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Continuous data protection over intermittent connections, such as continuous data backup for laptops or wireless devices

  • US 8,612,707 B2
  • Filed: 02/14/2013
  • Issued: 12/17/2013
  • Est. Priority Date: 07/03/2008
  • Status: Active Grant
First Claim
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1. A system for replicating changes to data stored on a portable device to an external data storage device, the system comprising:

  • at least one processor; and

    ,at least one data storage device coupled to the processor;

    wherein the processor is configured to—

    in response to an indication of a detected change to data stored in a data store of the portable device, store information in a data structure that indicates the detected change to the data,wherein the data store has blocks having sizes and the data structure is a bitmap,wherein data elements of the bitmap are associated with respective blocks of data stored in the data store, andwherein a size of each block is determined based on an existing threshold; and

    receive a connection indication that the portable device is communicatively coupled to the external data storage device;

    in response to the connection indication, access the information stored in the data structure; and

    copy the change to the data indicated by the information to the external data storage device.

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