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Native data signatures in a file system

  • US 5,978,814 A
  • Filed: 01/21/1998
  • Issued: 11/02/1999
  • Est. Priority Date: 01/21/1998
  • Status: Expired due to Term
First Claim
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1. In a file system of a computer operating system, a method for comparing data streams, comprising the steps of:

  • generating, for a first data stream, a first data signature including a plurality of first unique change identifiers, said first data stream being separated into a plurality of first allocation units, with each of said first unique change identifiers being associated with a different one of said first allocation units;

    generating, for a second data stream, a second data signature including a plurality of second unique change identifiers, said second data stream being separated into a plurality of second allocation units, with each of said second unique change identifiers being associated with a different one of said second allocation units; and

    comparing said first data signature and said second data signature to determine whether said first data stream and said second data stream are the same.

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