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System and method for replication of distributed databases that span multiple primary nodes

  • US 20020184239A1
  • Filed: 06/01/2001
  • Published: 12/05/2002
  • Est. Priority Date: 06/01/2001
  • Status: Active Grant
First Claim
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1. A method of backing up a distributed database system including a plurality of primary nodes, each with a database and transaction monitor, each primary node configured to participate in at least one distributed transaction, and each primary node having a backup node with a database, the method comprising:

  • performing a local backup operation on the database of each backup node to leave on the backup node'"'"'s database only those transactions received as committed or aborted from the backup node'"'"'s primary node; and

    performing a global backup operation to undo any committed transaction whose presence causes the backup nodes to primary nodes that participated in the distributed transaction to be inconsistent.

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