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Synchronization of plural databases in a database replication system

  • US 20040215670A1
  • Filed: 05/25/2004
  • Published: 10/28/2004
  • Est. Priority Date: 08/15/2001
  • Status: Active Grant
First Claim
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1. A method for synchronizing a target database with a source database in a database replication system wherein the source database is on-line during the synchronization, the target database thus receiving replication data during the synchronization, the source database being located at a first node of the system, and the target database being located at a second node of the system, the method comprising:

  • (a) sending successive blocks of data from the first node to the target database, each block of data having a key range, each block of data including one or more rows of data;

    (b) posting the successively sent blocks of data to the target database;

    (c) storing the total key range of the blocks of data received at the target database; and

    (d) posting any replication data received at the target database only if the row of data, or a key range inclusive of the row of data, corresponding to the received data has been previously posted to the target database through the synchronizing process.

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