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Chel 2020-01-26 22:48:09 +00:00 committed by admin
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doc/todo/key_checksum_from_chunk_checksums/comment_4_e766f725e22ea0a38ac2277e08fd3839._comment Normal file
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[[!comment format=mdwn
username="Chel"
avatar="http://cdn.libravatar.org/avatar/a42feb5169f70b3edf7f7611f7e3640c"
subject="comment 4"
date="2020-01-26T22:48:07Z"
content="""
Another theoretical use case (not available for now, but maybe for the future):
verify with checksums parts of the file and re-download only those parts/chunks, that are bad.
For this you need a checksum for each chunk and a \"global\" checksum in key, that somehow incorporates all these chunk checksums.
An example of this is Tiger Tree Hash in file sharing.
When I used the SHA256 backend in my downloads, I often wondered that the long process of checksumming a movie
or an OS installation .iso is not ideal. Because if the file download is not finished, I get the wrong checksum,
and the whole process needs to be repeated.
And in the future git-annex can integrate a FUSE filesystem and literally store just chunks of files,
but represent files as a whole in this virtual filesystem view.
"""]]