zpaqfranz
lepton
| zpaqfranz | lepton | |
|---|---|---|
| 4 | 5 | |
| 227 | 5,001 | |
| - | - | |
| 8.7 | 1.8 | |
| 18 days ago | over 1 year ago | |
| C++ | C++ | |
| MIT License | Apache License 2.0 |
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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
lepton
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JPEG XL: How It Started, How It’s Going
JPEG XL can losslessy transcode JPEG into a smaller format. JPEG2000 (or WebP or anything but Lepton[0]) didn't offer that. Besides, we have gif and png for approximately the same space. gif still isn't gone. Displacement isn't necessary for a new format to become useful.
[0] https://github.com/dropbox/lepton
- Jpeg Compression with Dropbox's Lepton
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Too bad this isn’t digitized. Would totally hoard it!
We also use https://github.com/dropbox/lepton to save disk storage. It give 20% saving in our experience.
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Questions about establishing a photography backup/storage system
It may not be directly related to your question, but Dropbox has developed a great open source software called Lepton. It is able to compress JPEGs losslessly and saves on average about 22% of storage space. The files are not readable after compression without decompression, but since your focus seems to be on archiving anyway, it might be handy. And for larger collections of high-resolution images, it can actually save a decent amount of storage space.
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AVIF support enabled by default in Firefox 86
Just wondering, is there a "lossless" conversion from PNG/JPEG/etc to AVIF? Kinda like Lepton[1] but just re-compressing without further loss of details.
[1] https://github.com/dropbox/lepton
What are some alternatives?
borgmatic - Simple, configuration-driven backup software for servers and workstations
brunsli - Practical JPEG Repacker
Bareos - Bareos is a cross-network Open Source backup solution (licensed under AGPLv3) which preserves, archives, and recovers data from all major operating systems.
ImageMagick - 🧙♂️ ImageMagick 7
dwarfs - A fast high compression read-only file system for Linux, Windows and macOS
kanzi-cpp - Fast lossless data compression in C++
par2cmdline - Official repo for par2cmdline and libpar2
Racjin-de-compression - Compression and decompression algorithms used in old PS2/PSP/Wii games by Racjin
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.
compressonator - Tool suite for Texture and 3D Model Compression, Optimization and Analysis using CPUs, GPUs and APUs
Snappy - A fast compressor/decompressor
Huffman-Coding - A C++ compression program based on Huffman's lossless compression algorithm and decoder.