REDUNDANT SYSTEM, REDUNDANCY METHOD, AND COMPUTER-READABLE RECORDING MEDIUM

摘要

A primary system includes a first node and a second node that backs up the first node. A secondary system includes a third node and a fourth node that backs up the third node. The first node in the primary system inserts, when transmitting data update information generated in response to a data update in the first node to the second node and the third node, one or a plurality of pieces of delimiter information indicating a boundary between update processing units, into both of transmit data. The fourth node in the secondary system specifies, based on the delimiter information, the data update information including update information whose process has progressed further from among the data update information obtained from the second node and the data update information obtained through the third node, and reflects the specified data update information to stored data of the fourth node.

主权项

1. A redundant system comprising:
a primary system including:
a first node; anda second node that backs up the first node; and a secondary system including:
a third node; anda fourth node that backs up the third node, wherein the first node in the primary system includes:
a processor that executes a first process including inserting, when transmitting data update information to the second node and the third node, one or a plurality of pieces of delimiter information into both of transmit data, the data update information being generated in response to a data update in the first node, and the delimiter information indicating a boundary between update processing units, and the fourth node in the secondary system includes:
a processor that executes a second process including:specifying, based on the delimiter information, the data update information including update information whose process has progressed further from among the data update information obtained from the second node and the data update information obtained through the third node, andreflecting the specified update information to stored data of the fourth node.