IRON File Systems

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IRON File Systems (2005)

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by Vijayan Prabhakaran , Nitin Agrawal , Lakshmi Bairavasundaram , Haryadi Gunawi , Andrea C. Arpaci-dusseau , Remzi H. Arpaci-dusseau

Venue:	In Proceedings of the 20th ACMSymposium on OperatingSystems Principles(SOSP ’05),Brighton, UnitedKingdom
Citations:	122 - 31 self

BibTeX

@INPROCEEDINGS{Prabhakaran05ironfile,
    author = {Vijayan Prabhakaran and Nitin Agrawal and Lakshmi Bairavasundaram and Haryadi Gunawi and Andrea C. Arpaci-dusseau and Remzi H. Arpaci-dusseau},
    title = {IRON File Systems},
    booktitle = {In Proceedings of the 20th ACMSymposium on OperatingSystems Principles(SOSP ’05),Brighton, UnitedKingdom},
    year = {2005}
}

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Abstract

Commodity file systems trust disks to either work or fail completely, yet modern disks exhibit more complex failure modes. We suggest a new fractured failure model for disks, which incorporates realistic localized faults such as latent sector errors and block corruption. We then develop and apply a novel faultinjection framework, to investigate how commodity file systems react to a range of more realistic disk failures. We classify their failure policies in a new taxonomy that measures their Internal RObustNess (IRON), which includes both failure detection and recovery techniques. We show that commodity file system failure policies are often inconsistent, sometimes buggy, and generally inadequate in their ability to recover from localized disk failures. Finally, we design, implement, and evaluate a prototype IRON file system, ixt3, showing that techniques such as in-disk checksumming and replication greatly enhance file system robustness while incurring minimal time and space overheads. 1

Keyphrases

iron file system latent sector error file system robustness realistic disk failure commodity file system failure policy new taxonomy commodity file system prototype iron file system recovery technique novel faultinjection framework space overhead new fractured failure model complex failure mode internal robustness minimal time block corruption failure policy disk failure commodity file system trust disk in-disk checksumming modern disk failure detection

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