synology-dsm-file-duplicate-remover

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synology-dsm-file-duplicate-remover

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File duplicate remover for Synology DSM 213j+

// repository documentation

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# synology-dsm-file-duplicate-remover

I created this utility to delete the files duplicate in one go by keeping the first version found because the dsm only allowed to delete each individual file one by one. I added the possibility to do a dry-run (no deletion) before actually running the real deletion. No body likes to delete the wrong files :)

# Enabling the duplicate file reporting

- From the main menu > click the Storage Analyzer
- Under Report profile > click Create
- In the storage usage report wizard > type in a name for the report and tick Duplicate file candidates.
- Define the frequency and tick generate now.
- Click on the report task, and then click view complete report
- Finally, you should be in the Disk Usage Report|Duplicate File Candidates report a csv download link should be displayed on the right.
- The dsm download link should look like : https://ip:port/dar/duplicates/YYYY-MM-DD_NN-NN-NN/report.html?SynoToken=XXXXXX

# Content of the csv
Group,Shared Folder,File,Size,Modified time

1,photo,/volume1/photos/album1/1.png,300 Mb,2018-03-27 22:30

1,photo,/root/1.png,300 Mb,2018-01-01 19:00

1,photo,/mnt/1.png,300 Mb,2018-01-01 19:00

It's true, I could have sorted the duplicate files by "shared folder" or "modified time" before deleting, this could be an improvement for later.

# Installation
Git clone on your Dsm, and build the jar with maven in /root.

Inside the Dsm run the reporting and download the csv in the location of this jar.

Requirements
-----------------------------
- Synology DSM Nas (at least v.5.x)
- Java 8 installed on it
- Have duplicate file reporting enabled like here: https://www.youtube.com/watch?v=nWw4wo61v80

Features 
-----------------------------
- Duplicate files remover
- Test run possible with -dry_run option
- Compatible with Synology DSM 213j+

Screenshots
----------------------------

Usage
----------------------------
java -jar SynoFileDuplicateRemover.jar -csv_file [file.csv] -dry_run

-csv_file: (mandatory) name of csv containing the list of duplicate files generated by the Nas.

-dry_run: (optional) no argument, test run no deletion.

Post-installation
----------------------------
Configure cron task

TODO
----------------------------
- [ ] Tests with French characters
- [ ] Add csv file
- [ ] Add screenshots

synology-dsm-file-duplicate-remover

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