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I recognized that the speed shown in the report email is calculated wrong.
Num VM Name Size Diff. State Time Speed Compress Errors 1  _IGMS07 366.11 GB 84.36 GB 1 01:19:42 78.40 MB/s 0 0
The speed is calculated using the Full Size and the Time, not the actually transferred data (Diff.) and the Time.
So in the example above the real Speed is not 78.40 MB/s but actually 18.06 MB/s
Last edited by Int (2021-08-27 07:44:26)
The speed is calculated on the nominal size of the files, like every other piece of software.
Ok, so that is intentional.
Not what I would have expected from "Speed" but that's ok.
Thank you for the explanation.
Well, it's a convention.
When you move a 1 GB file that contains 300MB: Windows, Linux and any other OS or software running on them will inform of the speed relative to the file size. If they only counted the buffer blocks that would contain some non-zero value, the speed would be slower. If they only counted the FS blocks that contained non-zero data the speed would be even slower, still the time taken to achieve the transfer would be the same.
So, if the convention is to calculate figures on the nominal file size, why would we do something different?
If on top of that we would offer a psicological poorer result, wouldn't it be some sort of masochism?