NODE

• US 20130339981A1
• Filed: 01/31/2012
• Published: 12/19/2013
• Est. Priority Date: 01/31/2011
• Status: Active Grant

• Current Assignee: Japan Agency For Marine-Earth Science And Technology
• Original Assignee: Japan Agency For Marine-Earth Science And Technology, Sas Co., Ltd.
• Inventors: Ishibashi, Shojiro, Kumagai, Takeyoshi
• Granted Patent: US 9,280,403 B2
• Time in Patent Office: Days
• US Class Current: 719/312
• CPC Class Codes: G05B 2219/2227 Common memory as well as local memory
• CPC Class Codes: G05B 9/03 with multiple-channel loop, i.e. redundant control systems
• CPC Class Codes: G06F 11/1438 Restarting or rejuvenating
• CPC Class Codes: G06F 11/1482 by means of middleware or OS functionality
• CPC Class Codes: G06F 11/2025 using centralised failover control functionality
• CPC Class Codes: G06F 11/203 using migration
• CPC Class Codes: G06F 11/2033 switching over of hardware resources
• CPC Class Codes: G06F 11/2035 without idle spare hardware
• CPC Class Codes: G06F 11/2038 with a single idle spare processing component
• CPC Class Codes: G06F 11/2043 where the redundant components share a common memory address space
• CPC Class Codes: G06F 11/3006 where the computing system is distributed, e.g. networked systems, clusters, multiprocessor systems multiprogramming arrangements G06F9/46; allocation of resources G06F9/50
• CPC Class Codes: G06F 11/3055 Monitoring arrangements for monitoring the status of the computing system or of the computing system component, e.g. monitoring if the computing system is on, off, available, not available error or fault processing without redundancy G06F11/0703; error detection or correction by redundancy in data representation G06F11/08; error detection or correction by redundancy in operation G06F11/14; error detection or correction by redundancy in hardware G06F11/16
• CPC Class Codes: G06F 9/54 Interprogram communication
• CPC Class Codes: G06F 9/544 Buffers; Shared memory; Pipes

Abstract

To facilitate changing a system configuration and allow having high redundancy in a computer system connecting a plurality of nodes. A node includes a CPU and constitutes a computer system. The node executes one or more processes and including predetermined functions. The node includes a shared memory that stores system information including process information related to each process executed by each node, in a state accessible from each process of its own node. In the node, the system information including the process information related to each process of its own node is multicast to the other nodes. A shared memory control process of the node receives the system information multicast from the other nodes and stores the system information in the shared memory.

Claims

1. A node that includes a CPU and that is connected to other nodes to constitute a computer system, the node comprising:

process execution means for executing one or more processes including predetermined functions;

a shared memory that stores system information including process information related to each process executed by each node included in the computer system, in a state accessible from each process executed by the process execution means;

system information transmission means for multicasting system information including process information related to each process executed by the process execution means in the system information to the other nodes; and

system information storage means for receiving the system information multicast from the other nodes to store the system information in the shared memory.

2. The node according to claim 1, wherein

the process executed by the process execution means causes the shared memory to store the process information related to its own process as the system information, and

the system information transmission means reads the system information stored in the shared memory to multicast the system information to the other nodes.

3. The node according to claim 1, wherein

the process executed by the process execution means constitutes the system information transmission means to multicast the system information including the process information related to its own process to the other nodes.

4. The node according to claim 1, further comprising

system management means for monitoring the system information stored in the shared memory to control the process or the node according to the system information.

5. The node according to claim 4, further comprising

node management means for monitoring a state of its own node or the process executed by its own node to set information indicating the state as the system information multicast by the system information transmission means.

6. The node according to claim 4, further comprising

risk estimation means for estimating a risk of occurrence of abnormality in its own node or the process executed by its own node to set information indicating the estimated risk as the system information multicast by the system information transmission means, wherein

the system management means controls the process or the node based on the risk estimated by the risk estimation means.

7. The node according to claim 1, further comprising

communication means for communicating with an apparatus other than the computer system to transmit and receive the system information stored in the shared memory.