It would still be downloading the whole file only to write out a new
one.  Rsync writes out a whole new file because it assumes it is doing
so locally.  The source of that new file can be a combination of parts
of the existing file and parts of the remote file but it still writes
the whole thing.  --inplace helps with that somewhat but you will
probably still write all of the file after the first difference.

On 03/14/2018 10:12 AM, Remi Gauvin via rsync wrote:
> On 2018-03-14 10:07 AM, Kevin Korb via rsync wrote:
>> --no-whole-file would only make it even worse.  It would have to read
>> the remote file over the network in order to do the diff then it would
>> write the whole file over the network anyway (--inplace would help a
>> little).  Local copies force --whole-file for a good reason.
> The one possible exception is if the cifs share is mounted over an
> asymmetrical Internet connection.. (ie, the download speed is 10X faster
> than the upload.)

        Kevin Korb                      Phone:    (407) 252-6853
        Systems Administrator           Internet:
        FutureQuest, Inc.       (work)
        Orlando, Florida       (personal)
        Web page:             
        PGP public key available on web site.

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