A method of mirroring log data in real time. The method can be used to mirror all log data from a source database or only that log data pertaining to a subset of objects in the source database. The log data is written to one or more datasets which are created and stored in a target database system which...http://www.google.de/patents/US6178427?utm_source=gb-gplus-sharePatent US6178427 - Method of mirroring log datasets using both log file data and live log data including gaps between the two data logs