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Replicating deletion information using sets of deleted record IDs

  • US 5,799,321 A
  • Filed: 07/12/1996
  • Issued: 08/25/1998
  • Est. Priority Date: 07/12/1996
  • Status: Expired due to Term
First Claim
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1. A method of reducing storage requirements when replicating information regarding deleted records in a distributed network of replicas, wherein records in the replicas have unique record identification numbers, the method comprising the steps of:

  • storing at a first replica a first set of deleted record identification (DRID) numbers that identify records deleted from the first replica, the first set of DRID numbers being stored without associated change numbers;

    modifying the first set of DRID numbers by adding new record identification numbers to the first set of DRID numbers to identify additional records, without associated change numbers, for newly deleted records from the first replica; and

    replicating information regarding deleted records to other replicas by sending to said other replicas information corresponding to the modified first set of DRID numbers stored in the first replica in order to thereby reduce storage requirements for representing deleted records.

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