面向Android系统的目录自适应日志模式选择机制

发布时间：2018-04-15 23:36

本文选题：文件系统 + 一致性　；参考：《计算机应用》2015年10期

【摘要】：在写磁盘的过程中如果意外掉电或系统崩溃很有可能导致文件系统中用户数据和元数据不一致,现有文件系统主要采取写前日志或写时拷贝等一致性技术来解决该问题,但均没有考虑目录对可靠性需求的差异性。针对现有的文件自适应日志模式存在的需要逐一修改应用程序的不足,提出了面向Android系统的目录自适应的日志模式选择机制,即针对不同的目录对可靠性需求的高低等级,选择相应的强弱程度不同的日志模式,同时分配可靠性不同的存储区域,这种机制对开发者完全透明,也符合Android系统的应用特征,在可靠性需求不变的前提下最大限度地减少了一致性保证引入的额外开销。实验结果表明,修改后的文件系统可以识别文件所在目录,并根据目录选择预先定义的日志模式。
[Abstract]:In the process of writing the disk if the unexpected power failure or system crash is likely to lead to the file system in user data and metadata inconsistencies in existing file system mainly adopts the write ahead log or copy on write consistency techniques to solve the problem, but do not consider the difference of demand for reliable directory. In order to exist the log file of the existing model of adaptive problems one by one to modify the application of the proposed adaptive log mode selection mechanism directory for Android system, which is in a different directory hierarchy of reliability requirements, choose the degree of choose corresponding different logging mode, at the same time the distribution of reliability of different storage area, this mechanism is completely transparent to the developers, also in line with the application characteristics of the Android system, which minimizes the consistency is introduced in constant demand under the premise of reliability Additional overhead. Experimental results show that the modified file system can identify the directory of the file and select the pre defined log mode according to the directory.

【作者单位】：首都师范大学信息工程学院;高可靠嵌入式系统技术北京市工程研究中心(首都师范大学);
【基金】：国家自然科学基金资助项目(61472260,61402302) 北京市自然科学基金资助项目(4143060) 北京市属高等学校人才强教深化计划项目(135300100) 北京市属高等学校创新团队建设与教师职业发展计划项目(IDHT20150507)
【分类号】：TP333.3

【共引文献】