| 一种基于文件支持度的动态副本管理机制 |
| 其他题名 | A Dynamic Replica Management Mechanism Based on File Support Degree
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| 肖中正; 陈宁江; 贾炅昊; 张文博
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| 2016
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| 发表期刊 | 计算机研究与发展
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| ISSN | 1000-1239
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| 卷号 | 53期号:2页码:431-442 |
| 摘要 | 在大规模分布式存储系统的容错技术中,数据副本管理是一种重要机制.针对网络环境中的动态副本管理需求,建立一种文件支持度指标及其动态计算模型.该模型 通过周期性数据采集,利用文件支持度的自相关性,结合文件上一采集周期访问量、访问量占比、被访问数据量以及文件级别等参数,构建了能够较准确描述文件的 动态副本需求状态模型.通过动态适应性的参数调整以适应变化的负载状态,使副本管理决策尽可能反映系统实际状态.在此基础上设计了数据结点负载均衡、副本 调整、副本清理等相关算法,实现了动态副本管理的目标.通过实验验证了所设计的动态副本管理机制的有效性. |
| 收录类别 | CSCD
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| 其他摘要 | Replication-based management schema is an important fault tolerance mechanism in large scale distributed storage systems. In response to the demand of dynamic replication management in distributed storage systems, a file popularity index named file support degree and its computation model are proposed. Within this model, file's parameters are periodically collected. By combination of self-correlation of file support degree, file hits in previous collection cycle, accessed data volume and file's grade, a model that exactly reflects files' replication requirement is built. To adapt to the variable system load, the model dynamically adjusts its parameters, making the replication decision-making to reflect real system status. Based on these work, some algorithms like load balancing, replication adjustment and replication clearing are designed. To avoid a single data storage node being overloaded, a data storage nodes' load-balance strategy is proposed. In this strategy, data storage nodes are divided into 3 groups: a holding group, an acceptable group and a begging group. There are 2 periodic procedures in the system, including replication adjusting procedure and replication clearing procedure. In replication adjusting procedure, top P files are replicated to data storage nodes selected based on the load-balance strategy. Replication clearing procedure is a long-periodic procedure, because it needs many adjusting procedures to make the begging group be empty. This dynamic replication management mechanism is proven effective through the given experimentations. |
| 关键词 | 分布式存储
动态副本管理
负载均衡
文件支持度
容错
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| 部门归属 | 肖中正, 广西大学计算机与电子信息学院, 南宁, 广西 530004, 中国;陈宁江, 广西大学计算机与电子信息学院, 南宁, 广西 530004, 中国;贾炅昊, 广西大学计算机与电子信息学院, 南宁, 广西 530004, 中国;张文博, 中国科学院软件研究所软件工程技术研究开发中心, 北京 100190, 中国;
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| 语种 | 中文
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| CSCD记录号 | CSCD:5647791
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| 内容类型 | 期刊论文
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| URI标识 | http://ir.iscas.ac.cn/handle/311060/17372
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| 专题 | 中国科学院软件研究所
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推荐引用方式
GB/T 7714 |
肖中正,陈宁江,贾炅昊,等. 一种基于文件支持度的动态副本管理机制[J]. 计算机研究与发展,2016,53(2):431-442.
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| APA |
肖中正,陈宁江,贾炅昊,&张文博.(2016).一种基于文件支持度的动态副本管理机制.计算机研究与发展,53(2),431-442.
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| MLA |
肖中正,et al."一种基于文件支持度的动态副本管理机制".计算机研究与发展 53.2(2016):431-442.
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