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Duplicacy: Lock-free deduplication cloud backup tool, with “fair source” license

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Re: Duplicacy: Lock-free deduplication cloud backup tool, with “fair source” license

#2

Post by acrosync »

Developer here. Duplicacy is built on the concept of Lock-Free Deduplication (https://github.com/gilbertchen/duplicacy/blob/master/DESIGN....), which allows it to backup multiple computers to the same storage without using any locks. Currently it supports local or networked drives, SFTP servers, Amazon S3, Backblaze B2, Microsoft Azure, Google Cloud Storage, Google Drive, OneDrive, Dropbox, and Hubic.

I recently released the source code under the Fair Source 5 License (https://fair.io/) which means it is free for individuals or businesses with less than 5 users. Otherwise the license costs only $20 per user/year.

Questions and suggestions are welcome.

Re: Duplicacy: Lock-free deduplication cloud backup tool, with “fair source” license

#3

Post by gravypod »

acrosync wrote: post #2

Developer here. Duplicacy is built on the concept of Lock-Free Deduplication ( https://github.com/gilbertchen/duplicacy/blob/master/DESIGN.... ), which allows it to backup multiple computers to the same storage without using any locks. Currently it supports local or networked drives, SFTP servers, Amazon S3, Backblaze B2, Microsoft Azure, Google Cloud Storage, Google Drive, OneDrive, Dropbox, and Hubic. I recently re…

There are two features that I need that are difficult to setup with most backup systems.

    1. Does this support encryption? 
    2. Can this do one-command restore of files to a previous revision or day?

Re: Duplicacy: Lock-free deduplication cloud backup tool, with “fair source” license

#5

Post by aatreya »

acrosync wrote: post #2

Developer here. Duplicacy is built on the concept of Lock-Free Deduplication ( https://github.com/gilbertchen/duplicacy/blob/master/DESIGN.... ), which allows it to backup multiple computers to the same storage without using any locks. Currently it supports local or networked drives, SFTP servers, Amazon S3, Backblaze B2, Microsoft Azure, Google Cloud Storage, Google Drive, OneDrive, Dropbox, and Hubic. I recently re…

Does Duplicacy use the filesystem events APIs like FSEvents on macOS to minimize the need for a full scan on every backup? CrashPlan has a lot of issues, but this is one of its best features.

Also, how do you see this as being different from Duplicati and Arq?

Re: Duplicacy: Lock-free deduplication cloud backup tool, with “fair source” license

#8

Post by koolba »

acrosync wrote: post #2

Developer here. Duplicacy is built on the concept of Lock-Free Deduplication ( https://github.com/gilbertchen/duplicacy/blob/master/DESIGN.... ), which allows it to backup multiple computers to the same storage without using any locks. Currently it supports local or networked drives, SFTP servers, Amazon S3, Backblaze B2, Microsoft Azure, Google Cloud Storage, Google Drive, OneDrive, Dropbox, and Hubic. I recently re…

From the link to the license:

> Fair Source has the power to promote diversity within the developer community. To date, contributing to open source has been an expensive proposition for developers. You have to have a stable income and a lot of extra time to work on side projects for free, which means talented developers from underprivileged backgrounds often aren’t able to contribute. Fair Source allows developers to monetize their side projects, which means more people can afford to join the ranks of developers who pursue these initiatives.

I find it funny that some people feel a need to justify charging money for something by coming up with bogus social justice rationalizations.

Re: Duplicacy: Lock-free deduplication cloud backup tool, with “fair source” license

#9

Post by acrosync »

gravypod wrote: post #3
acrosync wrote: post #2

Developer here. Duplicacy is built on the concept of Lock-Free Deduplication ( https://github.com/gilbertchen/duplicacy/blob/master/DESIGN.... ), which allows it to backup multiple computers to the same storage without using any locks. Currently it supports local or networked drives, SFTP servers, Amazon S3, Backblaze B2, Microsoft Azure, Google Cloud Storage, Google Drive, OneDrive, Dropbox, and Hubic. I recently re…

There are two features that I need that are difficult to setup with most backup systems. 1. Does this support encryption? 2. Can this do one-command restore of files to a previous revision or day?

Yes and Yes.

Duplicacy follows the git/hg command model. To initialize the repository (the backup to be backed up), run the init command:

  duplicacy init repository_id storage_url -e
The -e option turns on the encryption.

To backup:

  duplicacy backup
To restore:

  duplicacy restore -r revision_number [files]

Re: Duplicacy: Lock-free deduplication cloud backup tool, with “fair source” license

#10

Post by dom0 »

someonewhois wrote: post #7

How is this related to the other Duplicity backup software? http://duplicity.nongnu.org

Not related at all. (Duplicacy != Duplicity)

Duplicity is a pretty straight good old-fashioned incremental backup program.

Duplicacy on the other hand is hash-based deduplication (BorgBackup / Attic, Restic etc. are some others).

The design of Duplicacy is slightly different from that of e.g. BorgBackup. Duplicacy, as the title says, uses a lock-free approach. BorgBackup and the handful of open source tools in the same spirit use a synchronized approach.

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