A stream data processing system capable of highly reliable and highly usable real time data processing, is provided with: (1) a mechanism of copying some or all of stream data, and archiving the stream data in a non-volatile memory to allow real time data and archive data to be used seamlessly; and (2)...http://www.google.com/patents/US7958108?utm_source=gb-gplus-sharePatent US7958108 - Query processing method for stream data processing systems
