Tom Wardrop
Aug 29, 2012 3:58:05 AM

File Rename/Move Detection

Hi, I just wanted to request that Syncrify be given the ability to detect renames/moves in order to preserve the effeciant use of storage and bandwidth. This could be done fairly trivially by storing a checksum of each file (which I'd assume you probably already have to do). If a seemingly new file has the same checksum of an existing but differently named file, it could be assumed that the two files are identical, and the renamed could be recorded to the reverse differential. Additionally, it's possible that two files from the source directory may be duplicates of each other, in which case the same checksum could be used to transfer and store the file once (using sym/hard-links if available). This would get me using Syncrify immediately. Otherwise, it provides little advantage over using something like rdiff-backup which has the same limitations.


Frank
Sep 14, 2012 5:46:30 AM

File Rename/Move Detection

+1 ! Deduplication was a very nice feature to have. The larger the server (the more customers/computers to be backed up) the more useful! Obviously this part only works when encryption is disabled or all share the same key. Things to remind: - storage calculation should consider this fact - admin should be able to enable/disable globally - for privacy reasons: Give a /client/-side (even better: job-based) option to en/disable this feature


Robin
Sep 14, 2012 5:52:04 AM

File Rename/Move Detection

+1 for me too... Deduplication is also interesting for a single client, as diiferent peaple tend to save the same file in different locations for their ow "archive"


Synametrics support engineer
Sep 14, 2012 8:10:26 AM

File Rename/Move Detection

Hi, Your suggestion is very valuable and I have added this request in our to-do list. Regards, Imran.


Sverrir
Jun 1, 2014 9:31:36 AM

File Rename/Move Detection

Dear Imran.

I am very fond of your product and would like to implement it in my system (and others also), Syncrify almost does it all. Almost.
I have hundreds of gigabytes of data. When renaming e.g. one folder or one file, the whole lot is transferred again instead of "transferring" only the rename/move action and applying it on the server side (as is done in many proper syncing programs), thus preserving bandwidth to a great amount.

Now it's quite a while since you added this request to your to-do list. Are there any news on this feature?

Sincerely,
Sverrir



Stefan
Jun 11, 2014 5:49:50 AM

File Rename/Move Detection

I would also be very interested in the deduplication feature! Thanks & Regards Stefan


Dirk
Jul 18, 2014 8:47:25 AM

File Rename/Move Detection

The ability to detect file renames (and duplicates) or even move of files to other subdirs or rename of directories would indeed be very very useful...

I'm using synchrify to mirror my fileserver to my 2nd home over a VPN/Internet connection with only 6000kBit - transferring the full file just because it was renamed or moved is a real pain... Since this suggestion is 2 years old now - could someone from Synametrics please confirm the state of things?

Oh... And pretty please: Do it in a way it works even when a file is moved from one (sub)directory to another...

Should be possible... If it doesn't work with a checksum it could also be done using work with the file ID which is unique on each drive and will not change for a lifetime (ntfs)...

This is what a quick google said:

"If you call GetFileInformationByHandle, you'll get a file ID in BY_HANDLE_FILE_INFORMATION.nFileIndexHigh/Low. This index is unique within a volume, and stays the same even if you move the file (within the volume) or rename it.

If you can assume that NTFS is used, you may also want to consider using Alternate Data Streams to store the metadata."

 



Matias Almeida
Feb 19, 2016 6:14:30 AM

File Rename/Move Detection

Hey there. This would be very important to me also.

I´ve got clients that add and move a lot of content during work, and I´m having an excess of files being redownloaded and erased every backup.

Is there any time frame?

Regards,

Matias

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