Patent ID: 6879981
Filing Date: 2005-04-12
Classification: G06F,Y10S

Abstract:
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.