1
Dennis S DeLorme, Mark L Holm, Wilson D Lee, Peter B Passe, Gary R Ricard, George D Timms Jr, Larry W Youngren: Database index journaling for enhanced recovery. International Business Machines Corporation, Bradley A Forrest, April 4, 1989: US04819156 (113 worldwide citation)

A quick recovery of logical files which provide alternate views of databases is provided. Unchanged logical file pages are journaled before being changed. Transactions affecting databases covered by the logical files are also journaled. To recover a logical file, the journaled unchanged pages of the ...


2
Mark J Anderson, Richard L Cole, William S Davidson, Wilson D Lee, Peter B Passe, Gary R Ricard, Larry W Youngren: Index key range estimator. International Business Machines Corporation, Bradley A Forrest, September 27, 1988: US04774657 (40 worldwide citation)

A key estimator estimates the number of keys over a key range defined by key endpoints in an index to a data space. The number of keys in the key range required to be processed for a particular operation is estimated as a function of the number of pages referenced during a range level limited search ...



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