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Sharing live data with a non cooperative DBMS

  • US 20020103804A1
  • Filed: 01/09/2002
  • Published: 08/01/2002
  • Est. Priority Date: 01/16/2001
  • Status: Active Grant
First Claim
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1. A data-sharing method wherein a non-cooperative DBMS of a primary computer system participates in unaware applications and has a cache, respective lock structures, database log files and database data files responsive to data requests generated by the unaware applications, said method comprising the steps of:

  • (a) nonintrusively monitoring data written to said database log files and said database data files and communicating information as to data written to said files to a secondary DBMS running on a potentially different computer and having a secondary cache and secondary lock requests and responsive to data requests by other unaware applications; and

    (b) processing data in said secondary DBMS between said other unaware applications and with said secondary cache and said secondary lock requests while reading data from said non-cooperative DBMS data files without interrupting update or retrieval activities of said non-cooperative DBMS and while isolating said non-cooperative DBMS from said other applications, thereby enabling said other unaware applications to access the data maintained by said non-cooperative DBMS.

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