20 lines
906 B
Text
20 lines
906 B
Text
[[!comment format=mdwn
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username="joey"
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subject="""comment 5"""
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date="2019-04-03T17:03:04Z"
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content="""
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While it's true that most keys have a size field giving their size, in the
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context of this protocol, it's more relevant that the DATA message
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indicates the number of bytes of content that are going to be transmitted;
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once the receiver has sucessfully read that many bytes of content, it knows
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it has the whole content of the key.
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When resuming a previous transfer that has been interrupted, if the
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reciever happened to have all the content of the key, it would send GET
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with the number of bytes it already has, and the reply would be "DATA 0"
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which tells it that it already has all the content.
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If the whole content of the key has been received and a hash verification
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fails, git-annex throws away the corrupt data, since this protocol does not
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provide a way to recover from such a problem.
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"""]]
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