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Consistency checks #2

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tilsche opened this issue Oct 12, 2018 · 1 comment

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tilsche commented Oct 12, 2018

Make sure to only perform aligned writes
Ensure that all write sizes are checked
Write tests
Evaluate if checksums in the header make sense (length & checksum in header updated every so-and-so writes, dirty flag?)

Contributor Author

tilsche commented Oct 16, 2018 •

edited

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This is even worse than I thought...

Paper/slides on the topic - unfortunately without NFS, but I guess it's probably worse...
https://www.usenix.org/sites/default/files/conference/protected-files/osdi14_slides_pillai.pdf
https://courses.cs.washington.edu/courses/cse551/15sp/papers/alice-osdi14.pdf

garbage during file-appends 😱
append->append (same file) reordering 😱

Tool
https://github.com/madthanu/alice

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