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

  • US 8,380,957 B2
  • Filed: 04/24/2012
  • Issued: 02/19/2013
  • 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 a data target, the system comprising:

  • a change tracking component configured to, when the portable device is not communicatively coupled to the data target;

    receive an indication of a detected change to data stored in a data store of the portable device; and

    in response to the indication, 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, andwherein each bit of the bitmap is associated with a block of data stored in the data store, and the size of each block is determined based on a size limit of the bitmap; and

    a change replication component configured to, when the portable device is communicatively coupled to the data target;

    receive an indication that the portable device is communicatively coupled to the data target;

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

    copy the change to the data indicated by the information to the data target.

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