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Data base backup and recovery system and method

  • US 5,404,508 A
  • Filed: 12/03/1992
  • Issued: 04/04/1995
  • Est. Priority Date: 12/03/1992
  • Status: Expired due to Term
First Claim
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1. In a data processing system including a transaction processor for processing transactions against a primary data base and logging audit information related to the transactions, and first and second audit storage devices directly coupled to the data processing system, a method for maintaining a backup data base of the primary data base, comprising the steps of:

  • establishing a backup data base of the primary data base, wherein the backup data base is initially a copy of the primary data base;

    receiving transactions to process against the primary data base;

    updating the primary data base according to said transactions;

    writing by the transaction processor the audit information in a first audit file stored on the first audit storage device and in a second audit file stored on the second audit storage device;

    continuously reading said audit information from the second audit file as said audit information is written and said second audit file is available for reading; and

    updating the backup data base according to said audit information stored in said storage when said reading step detects that said storage is available.

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