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Two-pass multi-version read consistency

  • US 5,452,445 A
  • Filed: 04/30/1992
  • Issued: 09/19/1995
  • Est. Priority Date: 04/30/1992
  • Status: Expired due to Term
First Claim
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1. A method for executing a distributed transaction in a distributed database having at least first and second databases comprising the steps of:

  • generating a first system commit number associated with a first data block to be modified at said first database;

    generating a second system commit number associated with a second data block to be modified at said second database;

    comparing said first system commit number with said second system commit number;

    defining said first system commit number as a transaction system commit number if said first system commit number has a value greater than said second system commit number;

    defining said second system commit number as a transaction system commit number if said second system commit number has a value greater than said first system commit number;

    providing said transaction system commit number to said first database and said second database associated with said first block of data and said second block of data.

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