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This just happened to me today (lemmy.ml)
submitted 3 years ago by to c/programmerhumor@lemmy.ml
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It took 2 more hours than it should have to copy 125GB

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[–] 1 point 3 years ago (1 child)

If it doesn’t ignore existing by default, what’s the difference between that and plain old copy?

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  • [–] 2 points 3 years ago*

    Rsync checks the files and only issues the copy if the file size/modified dates are different by default. Ignore existing will not overwrite a changed file afaik.

    If the file is large it only sends the changed blocks (e.g. you have a 100gb database and only a dozen 4mb blocks have been modified it won't send the full 100gb across the network)

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