USE OF STORAGE MEDIUM AS COMMUNICATION NETWORK FOR ACTIVITY DETERMINATION IN HIGH AVAILABILITY CLUSTER

摘要

PROBLEM TO BE SOLVED: To use a shared disk so that a new, separate and independent network path for communication between nodes is effectively provided. SOLUTION: Activity determination in a plurality of nodes data processing system is improved by usually using a disk as a shared nonvolatile memory. The shared nonvolatile memory is used together with a transmission protocol defined so as to provided an independent communication path usable both for transmission of node activity information and other more general data transfer. The path is regarded to have importance at the same level as that of other network path and an activity instruction from a shared memory path is simultaneously regarded to have the importance at the same level as that of activity instructions from other single or a plurality of paths. COPYRIGHT: (C)2004,JPO&NCIPI