Deduplication is the finding and removal of duplicate files.

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Efficient removal of duplicate records across multiple Excel sheets

I have a workbook with 2 sheets. Sheet 1 has 3 columns (1A, 1B and 1C) and sheet 2 has 2 columns (2A and 2B). Now I need to delete rows from sheet 1 if 1A and 1B match any row in sheet 2 (i.e. 1A=2A ...
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22 views

Is it possible to perform Deduplication recursively?

If anybody is familiar with the concept of Deduplication (If not,read link on wikipedia) http://en.wikipedia.org/wiki/Data_deduplication Is it possible to perform Deduplication recursively i.e. ...
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35 views

In Windows, is there any software to prevent duplication of files in a folder?

Let's say I have two files c:\f1\data.txt and c:\f2\data.txt. If I give the command copy c:\f2\data.txt c:\f1\data\ I will receive a warning about the potential owerwriting. I will receive the ...
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18 views

Virtual folder combining a read-only and read-write directory (file deduplication)

Is it possible in linux to have a directory that contains all the contents of another directory (in a read-only fashion) but you are able to write to the directory without it affecting the 'parent' ...
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34 views

Which are good compression formats for an eternal version of a logfile? [closed]

I'm experimenting with logrotate and trying to set up an eternal version of a high volume logfile, e.g. /var/log/syslog, i.e. all entries should be preserved from the second the OS (Ubuntu 14.04) ...
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18 views

Is it possible to deduplicate a mounted truecrypt volume using Windows 2012?

An external volume has been encrypted using Truecrypt. Is it possible to run deduplication using Windows 2012 once the volume has been mounted?
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366 views

How to deduplicate 40TB of data?

I've inherited a research cluster with ~40TB of data across three filesystems. The data stretches back almost 15 years, and there are most likely a good amount of duplicates as researchers copy each ...
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1answer
71 views

Deleting all but latest revision of a file

So I have these massive lists of drawings that I've done for work and I'd like to be able to dump them all into one folder and run a batch that would delete all of the older revs and leave the highest ...
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22 views

Is there a diff-like tool that searches the directory for existence of the file or folder?

In an attempt to de-duplicate the data on my system, I've used tools such as Gemini for finding duplicate files across directories and diff tools like Kaleidescope for understanding how the ...
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176 views

ZFS + dedup: copy many small files fast

I'm running a ZFS backup server (with deduplication) to backup websites and store them with retention. To do this, I transfer all files to the backup server during the first backup, and make a copy of ...
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177 views

Deduplication vs Incremental Backups

I need good arguments for that question(s): Why would you take a daily full backup and deduplicate the volume, instead of taking a single full backup and afterwards continuing with incremental ...
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37 views

mv backup but instead of creating tilde directories, create tilde files in subdirectories?

I have 2 deep directory structures that are (probably) identical and I want to end up with a single one, but not auto-resolve existing conflicts (I'm guessing rsync would clobber something). I just ...
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3answers
4k views

How to remove duplicate row based on some columns

I have a excel sheet which contains duplicate I want to remove a row if its A C D E F columns are same (Ignore B while calculating duplicates but remove it while removing a row) At the moment it ...
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46 views

Copy files to location, skipping duplicates (in source and dest. location)

I have an external hardrive I think is running down breaking (unable to delete some files from it). I copied a bunch of files over already but ran out of space. How do I dedup while copying/How to I ...
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1answer
62 views

Deduplicating Multiple File Types Across Multiple Sources

We are faced with a situation where data has been backed-up to several external mediums and we are undergoing an exercise to consolidate the data. The data is comprised of binary files, audio, video, ...
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76 views

Duplicate Deletion Script does nothing

An associate of mine wrote a script for me that should theoretically delete files that have the same name, regardless of their file type. Specifically, it checks mp3, m4a, wma, wav files. However, ...
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159 views

Find unique files across 2 drives

I'm trying to compare 2 volumes, which mainly have the same content, but in completely different folder structures. (Around 2 million files.) I want to see which files are ONLY in 1 folder, not the ...
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109 views

How to stop Deduplication in Windows 2012 R2

Deduplication has been enabled on my server and I would like to stop it, since I don't need it to run. I have disabled the deduplication on the drive, but the deduplication process continues. How can ...
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772 views

Remove duplicate lines from a very large text-file [duplicate]

I have a very large text-file (> 50 GB), but most lines are duplicate, so I want to remove them. Is there any way to remove duplicates lines from a file, and handle files > 2GB? Because every method I ...
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1answer
180 views

Safety of redirecting System folders (e.g. : program files ,users,… ) using symbolic links?

Can redirecting system folders as mentioned above using symbolic links cause problems to the system or some applications? And is there any problem if I redirect the folders to another partition on ...
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3answers
68 views

Is there such a thing as a file hosted container which deduplicates data held within?

Background I have backups of a website which stores all of it's data into a single file. This file is several gigs large and I have many different backups of this file. Most of the data within is ...
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2answers
3k views

How to Enable Data Deduplication in Windows 8.1 client

How can i enable Data Deduplication in Windows 8.1 x64 client. http://weikingteh.wordpress.com/2013/01/15/how-to-enable-data-deduplication-in-windows-8/ The above link discusses the same for a ...
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523 views

Duplicate video finder? [duplicate]

Is there such a thing as a duplicate video finder that will look for duplicates based on video/audio comparisons of files rather than just the file size?
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2k views

How can I have two files with the same name in a directory when mounted with NFS?

I have a C++ application test that creates 10,000 files in an NFS mounted directory, but my test recently failed once due to one file appearing twice with the same name in that directory with all the ...
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2answers
487 views

Deduplicate files using the command line in OSX Lion

I am using OSX 10.8.4 and would like to remove duplicate files in a single flat directory if an md5 hash matches. I have looked up several answers but none of them work for me, I think because of ...
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71 views

How can I locate duplicate binary files using freely available tools?

As part of an exercise to help reduce the duplication of files, management would like to get a report of all duplicate binary files including images as these seems to exceed 100,000 or more and ...
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343 views

Deduplication efficiency with TrueCrypt File container and crashplan

I have a 100GB truecrypt container file (among lots of other things) that I am backing up with crashplan onto an external HDD. I have disabled "Preserve modification timestamp of file containers" so ...
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118 views

command line extracting especified file from 7z file

I would like to extract a specific file from a 7z file, but that filename exist twice on different directories. How can I choose one of them? I tried using compressed path but I received an error ...
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17 views

Background way to find duplicate media files [duplicate]

Any know a way to semi-automatically (in background?) identify (exact) duplicate media files to simplify deduplication? Media files eat up server space yet the need ot avoid loss leads to multiple ...
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1answer
324 views

What is the best way to merge two sets of files, but for duplicates to select the older file in Windows?

I have stumbled into a dumb usage case. I want to merge two folders in a particular way (I guess these are called folders now, I still think of them as directories, but whatever). The folders have ...
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2answers
330 views

Deduplicate Files inside multiple .tar.gz archives

I take a nightly backup from my Webhosting service as .tar.gz. The Data changed is very little each night (<10MB). I would like to archive these files and deduplicate (solid compression) files ...
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93 views

Copy only files that don't exist regardless of file name?

My dropbox account apparently renames all auto uploaded images. I'm about to clear my phone and I would like to verify that all images are in the dropbox folder before deleting them. If they had their ...
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393 views

avoid duplicate files during backup

I'm backing up 2 drives to an external backup drive. The 2 source drives have a lot of duplicate files (name/size) between them (for work). One of the source drives is already backed up to the ...
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695 views

How to identify duplicate files (by name and size) and delete them? [duplicate]

Possible Duplicate: Find duplicate files on Mac OS X I am trying to grep duplicate files in this selection: find . -name '*.CR2' I want to delete duplicate CR2 on my RAW files archive. ...
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79 views

Checking files on an external drive to whole computer for duplicates

I'm looking to use an external drive for a new purpose and want to see which, if any, files on it are not already on my main pc. I've seen comparison programs that can compare folders or one drive to ...
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1answer
59 views

Ensure the download is not a dupe

I want to (recursively) download a directory of files to a location from a WebDav Server. If the file is alreay present (somewhere there), it shall not be downloaded again. However the folder ...
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4k views

View ZFS deduplication ratio on a dataset

I have a tank consisting of several datasets, only one of which is configured to use deduplication. How can I see the ratio for this dataset? I get a ratio of 1.00x for the whole pool but I imagine ...
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4answers
419 views

Duplicate name exists solution

I have about 70 pc's with exactly same hardware. I decided to automate turning on and off. I took 1 PC. Here is what I've done: Changed bios configuration so that now pc's waking when I turn on AC ...
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1answer
623 views

ZFS compressed and deduped filesystem on file

I can create squashed filesystems with mksquashfs in this way: mksquashfs dir-1 dir-2 ... dir-n filesystem-on-file.squash -comp xz -Xbcj x86 -Xdict-size 1048576 -b 1024k mksquashfs provides ...
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3answers
439 views

Fuzzy Duplicate File Finder?

Is there any GUI application (either for Windows or Linux) that implements fuzzy hashing algorithms like ssdeep or sdhash to find near duplicate files (mostly text files)?
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1answer
701 views

How to find duplicate images and compare their meta-data?

Is there an application for Windows that finds duplicate images and lets quickly preview the image and, what is most important, the meta-data of the image files. I can see there are programs for ...
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3answers
2k views

Why do I have identical files in one directory, in Windows 7?

I just rebuilt my system after a new Power supply fired my CPU, MBD, Video card & a Blu-Ray drive. During all this I had to restore Windows from a backup (sector copy). All seems well, but ...
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2k views

iTunes - One track in several albums

I'm using Windows 7 to do this. I have quite an extensive library of music and now I have quite a lot of duplicate tracks but in different albums. Obviously I don't really want duplicate files but I'd ...
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1answer
113 views

Painless way of consolidating files across multiple machines/OSes

Just bought a NAS. So I thought I'd get all our photos, media files and pdfs consolidated, de-duplicated, de-junked and virus-checked and stick them all on it. We have 3 laptops, one running Windows, ...
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1k views

WMP 12.0 adds duplicate entries for same file mapped network drive

Windows Media Player 12 is adding duplicate entries for each file on my mapped network drive. When I try and rebuild the index by going to %UserProfile%\Appdata\Local\Microsoft\Windows Media, I am ...
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401 views

How to deduplicate files when storing in the SDFS file system using OpenDedup

I followed the link, http://www.opendedup.org/quickstart for installing OpenDedup in my linux machine (Ubuntu 12.04 - 64 bit). I created a SDFS volume and mounted it. I copied two similar Ubuntu VMs, ...
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446 views

Program for remove exact duplicate files while caching search results

We need a Windows 7 program to remove/check the duplicates but our situation is somewhat different than the standard one for which there are enough programs. We have a fairly large static archive ...
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1answer
308 views

How to de-dupe identical photos that have a slightly different file size?

I imported many photos using the new "camera import" feature of Dropbox. Many of those were duplicates of photos previously imported by direct copying from the camera. Strangely, the Dropbox import ...
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1answer
221 views

Is there a way to remove duplicate emails from a remote account?

I have a user who has multiple duplicated emails across multiple folders on his IMAP account. How he managed to create them is beyond me, but mine is not to reason why, just to fix it! Can anyone ...
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254 views

Rsync, how can I delete remote duplicates?

I'm trying to delete remote duplicate files without transferring the non-existing files, and without updating the existing files. If I specify both --existing and --ignore-existing (along with -av ...