Task key system survival emergency recovery method based on quaternary nested restart

A technology of key systems and recovery methods, applied in the direction of program loading/starting, error detection/correction, instrumentation, etc., to achieve the effect of enhancing recoverable elasticity, reducing recovery costs, and recovering system survivability

Inactive Publication Date: 2009-09-23
HARBIN ENG UNIV
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Problems solved by technology

At present, the existing research on restart recovery has not yet appeared in the field of survivability. The four-level recovery level proposed by the present invention is essentially different from the micro-restart and macro-restart mentioned in the above research. Therefore, the present invention is innovative. sex

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  • Task key system survival emergency recovery method based on quaternary nested restart
  • Task key system survival emergency recovery method based on quaternary nested restart
  • Task key system survival emergency recovery method based on quaternary nested restart

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Embodiment Construction

[0023] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0024] 1. Determine the level of the restart layer and the restart recovery strategy of different levels

[0025] To implement a fine-grained nested emergency recovery strategy, the system needs to be divided into several restart layers, and the restart objects of each layer must have atomic and concurrent independent service entities. Therefore, the restart recovery is defined as 4 levels: system level, service level, process level and thread level. System-level recovery takes the entire system as the restart target, service-level recovery takes the application service as the restart target, process-level recovery takes the specific process executed while the system is running as the restart target, and thread-level recovery takes each unit in the process as the restart target. Thread as restart object. Perform multiple service-level recovery before each system...

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Abstract

The invention provides a task key system survival emergency recovery method based on quaternary nested restart, and is technically characterized in that the restart level grade of different granularities and the restart recovery policy of different levels in system are ensured; the calculation method of restart priority level is defined, the restart sequence of each restart level module in system is ensured, and recursive nested restart link is established; and the implementation process describing recursive restart emergency recovery is formalized by using SPN and DFA. The invention has the following advantages: facing different fault scenes, the restart object of different granularities can be efficiently selected and the restart sequence is ensured, thereby reducing the recovery time, reducing the recovery cost, and strengthening recoverable elasticity of task key system survivability. When the system survivability is degenerated to a certain degree, the internal state is cleared by stopping used continuous operation or restarting system, application service or process, thereby releasing operating system resources and recovering system survivability.

Description

(1) Technical field [0001] The invention relates to an emergency recovery method for enhancing the survivability of a mission-critical system, in particular to an emergency restart recovery method for a high-survivability-oriented mission-critical system. (2) Background technology [0002] As the last resort to enhance system survivability, the emergency recovery technology focuses on ensuring the continuous service capability of key applications. The last line of defense in depth and the last stage of active response adopted by survivable systems. The basic idea of ​​emergency recovery is that when the survivability of the system or key services drops to a certain level, by periodically terminating the continued operation of the program, clearing the internal state of the continuous running system, restarting and restoring to the initial state or "healthy" The intermediate state restores the survivability of the system or application service to a certain extent and prevent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/445G06F11/00
Inventor 王慧强赵国生王健
Owner HARBIN ENG UNIV
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