| 基于特定失效概率的软件恢复策略分析 |
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| 引用本文： | 游静,徐建,赵学龙,刘凤玉. 基于特定失效概率的软件恢复策略分析[J]. 计算机工程, 2006, 32(9): 10-12 |
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| 作者姓名： | 游静 徐建 赵学龙 刘凤玉 |
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| 作者单位： | 南京理工大学计算机系,南京,210094;南京理工大学计算机系,南京,210094;南京理工大学计算机系,南京,210094;南京理工大学计算机系,南京,210094 |
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| 基金项目： | 国家自然科学基金资助项目（60273035）;国防科工委基础应用项目 |
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| 摘 要： | 对软件的两阶段失效与恢复模型进行了分析，基于特定失效概率求解最优恢复时间间隔，并利用半马尔可夫过程，得到特定失效概率下的平均恢复成本。为了将恢复成本降到更低，采用了嵌套的基于时间的软件恢复策略，同时考虑应用级和系统级的恢复，并求得了特定失效概率下的最大应用级恢复次数、恢复时间间隔序列以及最低年平均恢复成本。
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| 关 键 词： | 软件恢复 系统可靠性 软件老化 软件失效概率 |
| 文章编号： | 1000-3428（2006）09-0010-03 |
| 收稿时间： | 2005-05-01 |
| 修稿时间： | 2005-05-01 |
Analysis of Software Rejuvenation Policy Based on Given-failure-probability |
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| YOU Jing,XU Jian,ZHAO Xuelong,LIU Fengyu. Analysis of Software Rejuvenation Policy Based on Given-failure-probability[J]. Computer Engineering, 2006, 32(9): 10-12 |
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| Authors: | YOU Jing XU Jian ZHAO Xuelong LIU Fengyu |
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| Affiliation: | Department of Computer, Nanjing University of Science and Technology, Nanjing 210094 |
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| Abstract: | A method solving the rejuvenation intervals based on a given failure probability is put forward in this paper. The two-step failure model with rejuvenation interval and semi-Markov process are used for solving the mean rejuvenation cost based on the given failure-probability. In addition, considering fine-grained rejuvenation consumes lower cost and less downtime, this paper adopts the nested time-based software rejuvenation policy, which takes the application-level and system-level rejuvenation into account simultaneously. And then based on the given-failure-probability, it obtains the maximum times of application-level rejuvenation, the rejuvenation interval sequence, and the minimum mean rejuvenation cost. |
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| Keywords: | Software rejuvenation Software reliability Software aging Software failure probability |
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