Detecting and understanding crash-consistency bugs across the parallel I/O stack
Sun, Jinghan
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https://hdl.handle.net/2142/108145
Description
Title
Detecting and understanding crash-consistency bugs across the parallel I/O stack
Author(s)
Sun, Jinghan
Issue Date
2020-05-13
Director of Research (if dissertation) or Advisor (if thesis)
Snir, Marc
Department of Study
Computer Science
Discipline
Computer Science
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Parallel File System
Crash Consistency
Bug identification
High Performance Computing
Abstract
Parallel file systems (PFS’es) and parallel I/O libraries have been the backbone of high- performance computing (HPC) infrastructures for decades. However, their crash consistency bugs have not been extensively studied, and bug-finding or testing tools for identifying them are lacking. In this dissertation, we developed a generic testing system PFSCheck to study crash consistency bugs on popular PFS’es, such as BeeGFS and OrangeFS, with a cross-stack approach that covers HPC I/O library, PFS, and their interactions with local file systems. We evaluated the crash vulnerabilities of common HPC workloads and the evaluation results show that PFS’es and I/O libraries suffer from more crash consistency bugs than regular file systems due to the scale and complexity of the I/O stack. Local file system configurations such as journaling mode and the choice of consistency checker also influence the discovered vulnerability pattern.
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