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Robocopy not quite working for 1 million files

Posted on 2014-11-14
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Last Modified: 2014-11-21
Robocopy has been one of my favorite tools for about 15 years. However, in this case, it is not quite finishing the job.

I need to copy close to a million files totaling 10 GB from a remote SAMFS share to local Windows folder.
This is what I used:
Robocopy K:\ D:\Target\images\stills\ /E /COPY:DAT /R:0 /W:1 /NP /TEE /Log+:C:\temp\Robustcopy.log

(K: is mapped to remote SAMFS share.)

About half of the files got copied and then the process terminated on its own. The log file only showed the header. Thinking the log file may be getting too bulky, I removed "/NP /TEE /Log+:C:\temp\Robustcopy.log" and now the console only shows the initial screen (Started: Source: Dest: Files: Options:) and no name of any files. Cannot know if there is any progress or not.

How may I see progress of copying? Are these files too many for Robocopy? What other tool may be used? (This is production environment.) Thanks.

AK
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Question by:Akulsh
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13 Comments
 
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Assisted Solution

by:Gary Patterson
Gary Patterson earned 50 total points
ID: 40443296
I've had robocopy crash under similar circumstances - rarely, but it happens.  I've had good luck with fastcopy:

http://ipmsg.org/tools/fastcopy.html.en
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Expert Comment

by:aikimark
ID: 40443430
1. Are all the service patches applied?  What version are you running?
2. Have you tried doing the copy the other way around? (from server to workstation)
3. How much time elapses before the copy fails?
4. Are you working on the workstation during the copy?
5. Have you tried creating the target directory tree in a separate step?
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by:aikimark
aikimark earned 350 total points
ID: 40443446
If you aren't going to retry failed copies, why specify a wait time between retries?
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Author Comment

by:Akulsh
ID: 40443517
Gary,

Fastcopy is a good suggestion, but the link you included takes me to a Chinese/Japaness page when I click on download.
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Author Comment

by:Akulsh
ID: 40443559
Aikimark,

You are right that /W switch is not needed. But I don't think it should come in the way.

1. The version of robocopy is the one that comes with Win2008-R2, or 5.1.10.1027.
2. There is no workstation here. Source is non-Windows (SAMFS share) and target is Win2008-R2.
3. Time elapsed is at least 12 hours, because I see CMD windows gone next day.
4. Win2008-R2
5. Do you mean mapping a drive to the local folder? Are you sure that is something worth trying?

Thanks.

AK
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Expert Comment

by:aikimark
ID: 40443600
You are currently using a pull model.  I wondered if a push model might be a work-around.

Or is the system you are currently running the Robocopy command on a Windows Server 2008 box?

If you have the bandwidth in your server room, try adding the multi-threading option to your command Example: /MT:12
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Author Comment

by:Akulsh
ID: 40443916
Yes, I am running the robocopy on Win2008-R2 box. Cannot run on the Source side since that machine is not Windows.

/MT is a good suggestion -- which I have not used before -- but default threads are 8 and maximum is 128. Is there any reason to limit it to 12? Why not more since files are only 10 to 30 KB? The server has plenty of CPU resource. Thanks.
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Expert Comment

by:aikimark
ID: 40444019
Is there any reason to limit it to 12?
Thought it would be easy math if your current elapsed is 12 hours.
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Assisted Solution

by:ivanoviola
ivanoviola earned 100 total points
ID: 40444831
Just another suggestion.....

I've used Free File Sync in my environment with any issues. It's portable, free, fast and also copies over NTFS permissions.
About: http://sourceforge.net/projects/freefilesync/
Download: http://www.fosshub.com/FreeFileSync.html

I highly recommend it.

IV
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Author Comment

by:Akulsh
ID: 40444993
IV,

Thanks for this suggestion. This looks like a worthy tool but in this case we want to keep some extra files in the Target folder. In other words, we don't wish to mirror just overwrite. Thanks.

AK
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Expert Comment

by:ivanoviola
ID: 40445004
You can just do an update. You don't have to do a mirror. You have a few options.
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Accepted Solution

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Akulsh earned 0 total points
ID: 40446507
Thanks for all your suggestion. In the end, Robocopy options /R:1 and /W:1 worked and no log file.
It took about 24 hours to copy all files, and actual copying does not start till after about 12 hours.
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Author Closing Comment

by:Akulsh
ID: 40456973
aikimark got me thinking about /R and /W options but he did not suggest that I should increase the value for /R.
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