par2cmdline
zpaqfranz
| par2cmdline | zpaqfranz | |
|---|---|---|
| 28 | 4 | |
| 679 | 227 | |
| 2.1% | - | |
| 0.0 | 8.7 | |
| about 2 months ago | 17 days ago | |
| C++ | C++ | |
| GNU General Public License v3.0 only | MIT License |
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par2cmdline
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Best archival medium for 3-10 gig video files?
An alternative is including PAR2 files.
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Understanding CD-R and CD-RW (2003) [pdf]
Not only that but if you budget for an expected error rate of let's say 10% you can use par2 to create additional files that add that redundancy to your archives.
https://github.com/Parchive/par2cmdline
- Is this a viable strat to backup while still having some live access to relevant data?
- Par2cmdline is a PAR 2.0 compatible file verification and repair tool
- Tips for Long Term Data storage (20+ years).
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Side-by-side: WinRAR, PeaZip, 7-Zip, WinZip
That's the same reason I do archive files. For parity I personally use (https://github.com/Parchive/par2cmdline) which does create extra files, so I can see how WinRAR would have something to add there.
- Come aggiungere parità a un gruppo di DVD?
- Adding redundancy records to data
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FSArchiver – Filesystem Archiver for Linux
Here's the first example I could find.
https://pthree.org/2014/04/01/protect-against-bit-rot-with-p...
Basically, you take a normal TAR file and creates external parity files that can be used to recover data in the case of bitrot. Something like this would have been great to have on a few data files I had to retrieve from tape that ended up with a bit flip somewhere in the network > disk > tape > disk process.
However, it doesn't look like the program is maintained anymore...
http://parchive.sourceforge.net/
> DISCLAIMER: This project web space is not actively mantained and is presented here for archive purposes. However some project members still montior the project mailings lists if you have questions. (sic)
The last release was in 2004 (Wikipedia says it was active until 2015, but I don't see that).
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Archiver
Check out par2. I don't know personally of an open source one except I used QuickPar for Windows in the distant past. There's also multipar: https://github.com/Yutaka-Sawada/MultiPar and parchive: https://github.com/Parchive/par2cmdline
zpaqfranz
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How to ensure file integrity?
Now, onto files backup - if you value your data, don't make just one backup copy, make two or three. Also, I'd recommend using software that will make snapshots and you could restore whichever version you need. I am using zpaqfranz for few years now, it is command line software but you can make batch file and update the archive when needed - it will add only new and changed files, so only first backup will last long.
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Which compression algorithm/file type for backups?
ZPAQ1 is great, it supports incremental backups and compression algorithm is really good even on already compressed data like images. zpaqfranz2 is a fork that adds more advanced checksumming algorithms. It's also worth looking into.
- Zpaqfranz: Advanced and compatible fork of ZPAQ 7.15
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WINRAR - I have 20GB RAR file that I update daily. Issue is, whenever I want to add new file to that archive, it has to update all of those files that are pre-existing, it lasts just as long as it took it to create that 20GB archive. Is there a way to update archive without updating entire archive?
For best results I recommend the compatible fork with the latest advancements: https://github.com/fcorbelli/zpaqfranz
What are some alternatives?
par2deep - Produce, verify and repair par2 files recursively.
borgmatic - Simple, configuration-driven backup software for servers and workstations
dwarfs - A fast high compression read-only file system for Linux, Windows and macOS
lepton - Lepton is a tool and file format for losslessly compressing JPEGs by an average of 22%.
NanaZip - The 7-Zip derivative intended for the modern Windows experience
Bareos - Bareos is a cross-network Open Source backup solution (licensed under AGPLv3) which preserves, archives, and recovers data from all major operating systems.
fast-lzma2 - Fast LZMA2 Library
Squirrel - An installation and update framework for Windows desktop apps
CryptSync - CryptSync is a small utility that synchronizes two folders while encrypting the contents in one folder. That means one of the two folders has all files unencrypted (the files you work with) and the other folder has all the files encrypted.
chirppy - Play chirp.io chirps with Python
Snappy - A fast compressor/decompressor