How to skip existing and/or same size files when using robocopy

问题

I have this code, thanks to this forum:

@echo on
set source="R:\Contracts\"
set destination="R:\Contracts\Sites"

::Not sure if this is needed
::It guarantees you have a canonical path (standard form)
for %%F in (%destination%) do set destination="%%~fF"

for /r %source% %%F in (.) do if "%%~fF" neq %destination% ROBOCOPY "%%F" %destination% *.srt *.pdf *.mp4 *.jpg /COPYALL /R:0

Pause

I am not sure if the code above has "SKIP commands" if file exists / or skip if file is the same size.

It seems to take a long time for 400 files. I would like to get this right as soon it will be 40000 files.

Thank you.

回答1:

Do you want to exclude files of the same size, or files that haven't changed? If it's the latter, use the /XO switch in RoboCopy to exclude files that are older than those they're being copied over.

RoboCopy "%%F" %destination% *.srt *.pdf *.mp4 *.jpg /COPYALL /XO /R:0

回答2:

Are you wanting to mirror source and destination?
ROBOCOPY /MIR

It might be worth looking at the /FFT switch as well

You could of course use RAID 1, but I prefer having the discrete drives for flexibility.

Having said that, I've found robocopy regularly re-copies files that don't need to be copied. Perhaps a service is tweaking the dates in the source so they appear later.

I would like to know how to skip files of the same size and ignore dates since I know the files haven't changed if the sizes are identical for my media files.

来源：https://stackoverflow.com/questions/8935583/how-to-skip-existing-and-or-same-size-files-when-using-robocopy

标签

batch-file

robocopy