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Automatic prunning for log-based replication

  • US 6,473,776 B2
  • Filed: 08/02/1999
  • Issued: 10/29/2002
  • Est. Priority Date: 04/16/1999
  • Status: Expired due to Fees
First Claim
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1. A computer-implemented method for automatic pruning of a log used in a log-based replication of at least one database table within a relationable database management system, comprising:

  • (a) re-assembling at least one data row of the database table in at least one database structure from the log records;

    (b) marking a first log record for the data row being re-assembled;

    (c) removing the data row from the data structure when it is re-assembled;

    (d) identifying the marked first log record as an optional point at which to prune the log when the data row is removed from the data structure, in order to provide a minimum amount of storage space form the log, and yet ensures that all updates to the data table can be properly replicated from the log; and

    (e) automatically pruning the log of selected records prior to the optimal point.

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