Hitachi, Ltd.

Takafumi Jinsenji

Takafumi Nogami

Naoyuki Matsunaga

Shigehiro Hatakeyama

Takahiro Morimoto

Toshio Hata

Kazuhiko Omata

Nobutaka Okamoto

A redundant system is provided with a redundant failure detection configuration, and thereby is enabled to precisely detect a failure occurrence, and reliably execute a necessary system switching operation. In a redundant system, each of power supply mechanismsfor computersredundantly provided includes a processorconfigured to: monitor a write process in which predetermined information from another apparatusor another mechanismof the corresponding computeroris written to a storageof the power supply mechanism; execute an operation of powering off or resetting a power supply deviceif the write process is not in conformity with a predetermined rule; and after the execution of the operation, give an instruction to perform a fail-over operation to the other computer out of the computers

Redundant system and redundant system management method

A computer network comprising a monitoring apparatus and a plurality of servers, wherein the servers respectively have a plurality of software programs, and a data file for storing error analysis information to be utilized for analysis of the cause of an error upon occurrence of error, for each software program. Further, the servers respectively have a function to transmit an error notifying message including a software identifier of a software program executed upon occurrence of error to the monitoring apparatus. The monitoring terminal apparatus has a function to instruct at least one server, specified based on the software identifier included in the error notifying message, to save error analysis information, in response to the error notifying message received from any one of the servers.

Distributed data processing system and error analysis information saving method appropriate therefor

Growing community of inventors

Yokohama, Japan

Takafumi Jinsenji