The operational information management manner in the maruchikurasuta system, program storage null for the maruchikurasuta system and online operational

摘要

PROBLEM TO BE SOLVED: To secure the identity of data between clusters, to actualize the improvement of access capability, and to guarantee data in the case of abnormality as to the on-line operation information managing method of a system which processes on-line operation on clusters in parallel. SOLUTION: A main storage device 13 on each cluster 10 is stored 14 with operation information needed for on-line operation and if an update event occurs to the operation information in some cluster 10, an update process for the same update data is performed dynamically for main storage devices 13 of other clusters 10 to retain the same operation information at respective clusters 10. At this time, the reflection of operation information which is updated on a main storage device 13 is performed in synchronism with the completion of a transaction having generated the update event of the operation information.