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Infomration processor

A technology of information processing equipment and processors, which is applied in the fields of electrical digital data processing, generation of response errors, instruments, etc., and can solve problems such as time increase

Inactive Publication Date: 2004-02-04
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, as the size of the memory in the computer module increases, the time to copy the entire contents of the memory in the computer module also increases

Method used

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Examples

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Embodiment Construction

[0020] As described in the background, the causes of computer modules being out of consistent synchronization are permanent or non-permanent failures. In a fault-tolerant computer, a computer module in which a permanent failure has occurred must be replaced. On the other hand, if a computer module is out of consistent synchronization due to a non-permanent failure, it is usually not replaced but rejoined without any changes. That is, in quite a few cases, computer modules that lose consistent synchronization rejoin the fault-tolerant computer.

[0021] It is an object of the present invention to reduce the time during which a coherent fault-tolerant computer is inoperative when a computer module out of coherent synchronization is rejoined without replacement.

[0022] Embodiments of the present invention will be described in detail below.

[0023] refer to figure 1 , the information processing device includes computer modules 300 and 301 . In this embodiment, the informati...

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PUM

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Abstract

An information processing apparatus of the present invention includes first and second computer elements which execute the same instructions substantially simultaneously and which are substantially synchronized with each other. The first computer element includes first and second memory elements, which are written by the first and second computer elements, respectively, during a first state. The information processing apparatus has a control element which makes the first computer element read from the second memory element during a second state. Another information processing apparatus has the first and second computer elements, and first and second memory areas which are provided in the first computer element. The first and second memory areas are written by the first computer element and the second computer element, respectively, during a first state. A control element makes the first computer element read from the second memory area during a second state.

Description

technical field [0001] The present invention relates to an information processing device, such as a lockstep fault tolerant computer, which simultaneously processes the same instructions in a plurality of clock-synchronized computer modules, and more particularly to an information processing device, The information handling device rapidly synchronizes the computer module with the other computer modules that have become out of synchronization and isolated from operation. Background technique [0002] Traditional step-by-step fault-tolerant computers have multiple computer modules that execute the same instructions simultaneously. In a fault-tolerant computer, one of the computer modules may operate differently from the other computer modules due to a failure or some other reason. When a computer module is detected that is operating differently from other computer modules, in other words, when it finds a computer module that is out of coherent synchronization, the coherent fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/18G06F11/00G06F11/16G06F11/20
CPCG06F11/1658G06F11/20G06F11/1666G06F11/00
Inventor 爱野茂幸山崎茂雄
Owner NEC CORP
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