2020-09-01 20:00:49 +00:00
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The forwardRetry RetryDecider keeps retrying a transfer as long as at least
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one more byte got transferred than in the previous, failed try.
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Suppose that a transfer was restarting from the beginning each time, and it
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just so happened that each try got a tiny little bit further before
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failing. Then transferring an `N` byte object could result in `sum [1..N]`
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bytes being sent. Worst case.
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So I think forwardRetry should cap after some amount of automatic retrying.
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Ie, it could give up after 5 retries. --[[Joey]]
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2020-09-01 20:04:40 +00:00
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Of course, the real use case for forwardRetry is remotes that use eg, rsync
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and can really resume at the last byte. But, forwardRetry can't tell
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if a remote is doing that (unless some timing heuristics were used). Around
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5 retries seems fairly reasonable for that case too, it would be unlikely
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for a rsync transfer to keep failing so many times while still making
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forward progess. --[[Joey]]
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