Memory-mirroring control apparatus and memory-mirroring control method
AssigneeFujitsu Limited
InventorsKazuhisa Fujita, Kazuya Uesugi
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Abstract
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.
Claims18
A 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:
- generating, when an update instruction for updating data stored in a predetermined memory is transmitted through a transaction process performed by an application, based on the update instruction, the update log indicating update contents of the data stored in the predetermined memory;
- and
- controlling memory-mirroring among the memories by distributing, in a multicast manner, the generated update log to a plurality of other node apparatuses each with a memory.
A method of controlling data mirroring among a plurality of memories using a computer, the method comprising:
- generating, when an update instruction for updating data stored in a predetermined memory is transmitted through a transaction process performed by an application, based on the update instruction, the update log indicating update contents of the data stored in the predetermined memory;
- and
- controlling memory-mirroring among the memories by distributing, in a multicast manner, the generated update log to a plurality of other node apparatuses each with a memory.
An apparatus of controlling data mirroring among a plurality of memories, the apparatus comprising:
- an update-log generating unit that generates, when an update instruction for updating data stored in a predetermined memory is transmitted through a transaction process performed by an application, based on the update instruction, the update log indicating update contents of the data stored in the predetermined memory;
- and
- a memory-mirroring control unit that controls memory-mirroring among the memories by distributing, in a multicast manner, the generated update log to a plurality of other node apparatuses each with a memory.
Dependencies are inferred from the claim text.