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Method and system for managing multiple database storage units

  • US 6,801,921 B2
  • Filed: 07/17/2001
  • Issued: 10/05/2004
  • Est. Priority Date: 09/08/2000
  • Status: Expired due to Fees
First Claim
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1. A method of managing a plurality of databases in response to continuous transactions, the databases including at least a first database, a second database and a third database, comprising:

  • simultaneously maintaining first data in the first database and a duplicate set of second data in the second database in response to database transactions;

    determining a point in time for a predetermined database management task;

    discontinuing the database transactions to and from the second database;

    continuing the database transactions to and from the first database;

    rolling back the second data in the second database to the point in time;

    connecting the second database to the third database;

    extracting a portion of the rolled back second data;

    updating the third data in the third database based upon the extracted from the second database;

    rolling forward the second data in the second database to match the first data in the first database; and

    resuming the database transactions to and from the second database.

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