Database disaster remote site recovery
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 1, 2001
Grant Date -
N/A
app pub date -
Mar 27, 1998
filing date -
Mar 27, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An integrated DBMS solution to recover primary site database based upon the maintenance of a shadow copy of the primary site's database data and logs at a remote site. Both the primary site DBMS and the remote site DBMS may support write-ahead logging protocol in which log records are written to a log data set before database updates are entered into the remote site storage. The remote site serves at least two functions: as a 'tracker' DBMS and as a 'take-over' DBMS. The tracker function maintains a shadow copy of the primary site's database data sets at the remote site. The multi-phased take-over function uses the shadow copies to update the remote site database data sets and substitutes them for primary site database data sets made unavailable by an unplanned disaster at the primary site.
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Cited Art Landscape
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