Talk Title: Analyzing Configuration Dependencies of File Systems
Abstract: File systems play an essential role in modern society for managing precious data. To meet diverse needs, they often support many co
nfiguration parameters. Such flexibility comes at the price of additional complexity which can lead to subtle configuration-related issues. To address this challenge, we study the configuration-related issues of two major file systems (i.e., Ext4 and XFS) in depth, and identify a prevalent pattern called multilevel configuration dependencies. Based on the study, we built an extensible tool called ConfD to extract the dependencies automatically and create six plugins to address different configuration-related issues. Our experiments on Ext4 and XFS show that ConfD can extract more than 150 configuration dependencies for the file systems with a low false positive rate. Moreover, the dependency-guided plugins can identify various configuration issues (e.g., mishandling of configurations, regression test failures induced by valid configurations).
Bio: Tabassum Mahmud received her bachelor’s degree in electrical engineering from Chittagong University of Engineering and Technology in Bangladesh. She is currently pursuing her doctorate degree in computer engineering at the Iowa State University advised by Dr. Mai Zheng. She has research interest in storage reliability and storage systems. Her current research is focused on improving the file systems by improving their reliability and performance.
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