| 摘要 |
PROBLEM TO BE SOLVED: To provide a parallel database processing system which efficiently performs a classifying and totalizing process. SOLUTION: This parallel data base processing system equipped with an inquiry processing server 5, an input/output server 2, and a totalizing process server 4 which are connected by a network distributes records read out by the input/output server 2 to the totalizing process server 4 by a record distributing means 9 and also generates a totalization result by totalizing the received records by the totalizing process means, sorts the totalization result in a main storage and holds it as a partial totalization result in an auxiliary storage device 17 unless the totalization result is too large to store in a totalization result storage area 13, and merges held partial totalization results when totalizing processes of all records end and transfers the merging result as an intermediate totalization result to the inquiry processing node, thereby integrating received intermediate totalization results by using a totalization result integrating means 15. Consequently, the classifying process and totalizing process are carried out in parallel to prevent random I/O from being generated. |
