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Method, system, and program for improved throughput in remote mirroring systems

  • US 20040181640A1
  • Filed: 03/11/2003
  • Published: 09/16/2004
  • Est. Priority Date: 03/11/2003
  • Status: Active Grant
First Claim
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1. A method for reducing an amount of data transferred, comprising:

  • maintaining indicators of sub-blocks modified for a block of data since the block of data was last sent to remote storage until the block of data is demoted; and

    using the maintained indicators to identify sub-blocks on the block of data for transfer to the remote storage.

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