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Where the the correctness go?Where the the correctness go?Posted Mar 16, 2009 4:49 UTC (Mon) by dlang (✭ supporter ✭, #313)In reply to: Where the the correctness go? by bojan Parent article: Ts'o: Delayed allocation and the zero-length file problem
ven doing s fsync doesn't mean that you won't have this corruption. the two writes could go to the disk drive's buffer and it could write the metadata out before it writes the data blocks. if it looses power in between these two steps you have the same problem
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Where the the correctness go? Posted Mar 16, 2009 13:28 UTC (Mon) by jamesh (guest, #1159) [Link]
Of course, if the drive supports barriers in its command queueing implementation it should be possible to prevent it reordering those writes.
That is likely to restrict reorderings that won't break correctness guarantees though.
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