casync
Content-Addressable Data Synchronization Tool (by systemd)
rdedup
Data deduplication engine, supporting optional compression and public key encryption. (by dpc)
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
casync
Posts with mentions or reviews of casync.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-01-10.
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We reduced conda’s index fetch bandwidth by 99%
For arbitrary state changes however, it's better to use something like casync. Note that there are a lot of tunables, implicit and explicit; for package indexing I would particularly think about "how is the index sorted" and "what is the desired chunk size".
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Intro to Content Defined Chunking
If you just want something practical to play with, see casync. Even if it doesn't fit your workflow, or if you think you can do better, chances are you're best off building on top of it or adding patches to it, not starting from scratch.
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Tool to clone file structure without the large files themselves?
You probably want casync.
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A Nibble of Content-Defined Chunking - How de-duplicated, incremental file transfer works
Obligatory link to casync, which implements this better than most alternatives.
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LibSQL – a fork of SQLite that is both Open Source, and Open Contributions
(personally, I think more people need to be aware of casync for the update storage/distribution problem. It isn't perfect for every use case, but it's good enough that you're probably better off wrapping/forking it rather than reimplementing it badly from scratch)
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improving download infra
Does something like casync (https://github.com/systemd/casync or https://github.com/folbricht/desync) serve any purpose or provide any advantage to propagating rpm changes over rsync?
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Are there any true alternatives to Seafile? (Nextcloud is not an alternative in this context)
Software that comes to mind for syncing lots of small files: git (and other source versioning tools), casync (https://github.com/systemd/casync) and a go implementation (https://github.com/folbricht/desync). Not really an answer and I can't think of a way to shoehorn that into your workflow, but maybe it leads you down a useful road.
- Casync – A Content-Addressable Data Synchronization Tool
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Hacker News top posts: Apr 23, 2022
Casync – A Content-Addressable Data Synchronization Tool\ (15 comments)
rdedup
Posts with mentions or reviews of rdedup.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-04-24.
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Announcing rustic - fast, encrypted, deduplicated backups powered by Rust
I'm not really doing much about it anymore, but I have somewhat similar project: https://github.com/dpc/rdedup
- Restic: Backups Done Right
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Fastest way to write and delete files?
I'm the author of https://github.com/dpc/rdedup . Threads is your answer. Make a large threadpool, process IO in it, use channels to submit work and responses if need.
- Deduplicating Archiver with Compression and Encryption
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Encrypted Backup Shootout
rdedup (rust) - https://github.com/dpc/rdedup
What are some alternatives?
When comparing casync and rdedup you can also consider the following projects:
kopia - Cross-platform backup tool for Windows, macOS & Linux with fast, incremental backups, client-side end-to-end encryption, compression and data deduplication. CLI and GUI included.
BorgBackup - Deduplicating archiver with compression and authenticated encryption.
tarsnap - Command-line client code for Tarsnap.
Rsnapshot - a tool for backing up your data using rsync (if you want to get help, use https://lists.sourceforge.net/lists/listinfo/rsnapshot-discuss)
desync - Alternative casync implementation
bupstash - Easy and efficient encrypted backups.
zstd - Zstandard - Fast real-time compression algorithm
magic-trace - magic-trace collects and displays high-resolution traces of what a process is doing
lrzip - Long Range Zip
ludusavi - Backup tool for PC game saves