DISTRIBUTED SHARED DISK SYNCHRONIZER, DISTRIBUTED SHARED DISK SYNCHRONIZATION SYSTEM, AND DISTRIBUTED SHARED DISK SYNCHRONIZATION METHOD

摘要

PROBLEM TO BE SOLVED: To achieve the high speed operation of resynchronization work by preventing transmission of whole data during the resynchronization work. SOLUTION: A distributed shared disk synchronizer includes: a storage part for storing write position information showing the write position of write information to a distributed shared disk; a means for detecting failure occurrence in an information processor connected through a communication path; a means for storing the write position information in the storage part for each write information when the failure occurrence in the information processor is detected; a means (step S14) for integrating a plurality of pieces of the write information on the basis of aggregate width for aggregating the plurality of write information, and for compressing the stored plurality of pieces of the write position information; a means for detecting restoration of the information processor where the failure has occurred; and a means for transmitting a plurality of pieces of the compressed write information and the write information of the distributed shared disk corresponding to the plurality of pieces of the compressed write position information to the restored information processor when the restoration of the information processor is detected. COPYRIGHT: (C)2007,JPO&INPIT