Memory-mirroring control apparatus and memory-mirroring control method

摘要

When an update instruction for updating task data stored in a memory is transmitted through a transaction process performed by an application server, an active node apparatus generates, based on the update instruction, an update log indicating update contents of the task data stored in the memory, and then distributes, in a multicast manner, the generated update log to other standby node apparatuses each with a memory. With this, mirroring among the plurality of memories is controlled.

主权项

1. A non-transitory computer readable storage medium containing instructions for controlling data mirroring among a plurality of memories, the instructions, when executed by a computer, cause the computer to perform a process comprising:
generating, when an update instruction for updating task data stored in a predetermined memory of an apparatus is transmitted to the apparatus and a plurality of other node apparatuses in a multicast manner through a transaction process performed by an application, based on the update instruction, update information including update contents of the task data stored in the predetermined memory; controlling memory-mirroring among the memories of the apparatus and the plurality of other node apparatuses by distributing, in a multicast manner, the generated update information from the apparatus to the plurality of other node apparatuses; and commencing updating of the task data stored in the predetermined memory of the apparatus based on the generated update information, after the apparatus distributes the generated update information at the controlling.