28 lines
1.3 KiB
Markdown
28 lines
1.3 KiB
Markdown
Windows has an unfortunate handling of time zones, which means that when
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the time zone is changed (or DST changes), the timestamps of files also
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appear to change.
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This means that after such a change, git-annex will see new mtimes, and
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want to re-checksum every file in the repo.
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[[!tag confirmed]]
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> Update: Actually, I seem to have been getting confused by behavior of
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> cygwin terminal setting TZ. That indeed led to timestamp changes when the
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> time zone changed. I have made git-annex unset TZ to avoid this.
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>
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> Without TZ set, time stamps are actually stable across time zone changes.
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> Ie, a simple program to read the time stamp of a file and print it
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> always shows the same thing, before and after a timezone change.
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>
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> However, and here's where it gets truely ghastly: A program that stats a
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> file in a loop will see its timestamp change when the timezone changes.
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> I suspect this might be a bug in the Haskell RTS caching something it
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> should not. Stopping and re-running the program gets back to the
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> original timestamp.
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>
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> I have not tested DST changes, but it's hard to imagine it being any
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> worse than the above behavior.
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>
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> So, that's insane then. We can't trust timestamps to be stable on windows
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> when git-annex is running for a long period of time. --[[Joey]]
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