--partial not working?

McDowell, Blake McDowellH at si.edu
Fri Jun 24 19:22:37 UTC 2016


Hi Kevin, 

I'm not a systems manager so my apologies if I'm a little lost here. I'm an audiovisual conservator/archivist and I use rsync for transferring files, a lot. 

Yes, I connect to the server and then it shows up as a disk on my desktop and I run rsync between the external drive mounted on my computer and the now mounted server. So, this would be a local copy? And, therefore, there is no way to invoke --partial because --whole-file is forced?

I don't quite understand what you mean by "rsync isn't doing the networking", but if it is not doing this then is there no checksumming occurring during the transfer? Unless, of course, -c.

Thanks!

-----Original Message-----
From: rsync [mailto:rsync-bounces at lists.samba.org] On Behalf Of Kevin Korb
Sent: Friday, June 24, 2016 3:07 PM
To: rsync at lists.samba.org
Subject: Re: --partial not working?

If you are doing a local only copy (rsync isn't networking) then --whole-file is forced.  There is no benefit of reading and checksumming files to reduce network transfer when there is no network transfer.

You said you were moving data to a remote server so I assume you are using a network mount of some kind to make it a local copy instead of letting rsync do the networking.

Anyways, if rsync isn't doing the networking then forcing it to do a delta transfer would only make it take even longer.

On 06/24/2016 02:59 PM, McDowell, Blake wrote:
> Hi Kevin,
> 
> I haven't specified --whole-file. After entering an rsync command the terminal always reads "delta-transmission disabled for local transfer or --whole-file" but I assume that is just a standard phrase that always appears. 
> 
> So, if I am running partial (-P) and not using --whole-file or disabling the delta-transmission, why would an incomplete file be deleted and the transfer start anew after an interruption?
> 
> Blake
> 
> -----Original Message-----
> From: rsync [mailto:rsync-bounces at lists.samba.org] On Behalf Of Kevin 
> Korb
> Sent: Friday, June 24, 2016 12:03 PM
> To: rsync at lists.samba.org
> Subject: Re: --partial not working?
> 
> Partial means don't delete the incomplete file.  The file is being transferred because it doesn't match.  But rsync does delta-transfers so it won't actually transfer the parts that match.  It will just verify that they do match.
> 
> Unless of course --whole-file.
> 
> On 06/24/2016 11:47 AM, McDowell, Blake wrote:
>> Hello,
>>
>>  
>>
>> I’m running rsync -avPhi to move large video files to a remote server.
>>  Often we have to stop a transfer midway through to push something 
>> else to the server. My hope was that the -P flag would invoke 
>> --partial and the transfer would pick-up where it left off. This does 
>> not seem to be happening. Rather, the transfer starts over from the 
>> beginning, erasing the partially transferred file.
>>
>>
>> When I redo the transfer my I see this:
>>
>>> f.st..g.... afc2010039_crhp0026_mv06_concat_Williams_Cecil_J.mov
>>
>>
>> I understand what all of that means, but I don't know why it doesn't 
>> resume the partial transfer.
>>
>>
>> Do I need to change my rsync command to allow it to resume a transfer 
>> of a partially transferred file?
>>
>>
>> Thanks,
>>
>> Blake
>>
>>
>>
> 
> --
> ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,
> 	Kevin Korb			Phone:    (407) 252-6853
> 	Systems Administrator		Internet:
> 	FutureQuest, Inc.		Kevin at FutureQuest.net  (work)
> 	Orlando, Florida		kmk at sanitarium.net (personal)
> 	Web page:			http://www.sanitarium.net/
> 	PGP public key available on web site.
> ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._
> .,
> 

--
~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,
	Kevin Korb			Phone:    (407) 252-6853
	Systems Administrator		Internet:
	FutureQuest, Inc.		Kevin at FutureQuest.net  (work)
	Orlando, Florida		kmk at sanitarium.net (personal)
	Web page:			http://www.sanitarium.net/
	PGP public key available on web site.
~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,




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