duplicity
lrzip
duplicity | lrzip | |
---|---|---|
4 | 6 | |
80 | 585 | |
- | - | |
0.0 | 3.7 | |
about 2 years ago | 4 days ago | |
Python | C | |
- | GNU General Public License v3.0 only |
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duplicity
- Restic: Backups Done Right
- Deduplicating Archiver with Compression and Encryption
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I recently learned about CHANGELOG and have a few questions about them
Well, depends on you. There are projects, that more or less put every commit into the CHANGELOG (there are even tools for this) or every PR. (Example)
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Encrypted Backup Shootout
duplicity (python) - https://github.com/henrysher/duplicity
lrzip
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How to Get Your Backup to Half of Its Size – ZSTD Support in XtraBackup
lrzip
Long Range ZIP or LZMA RZIP
https://github.com/ckolivas/lrzip
"A compression utility that excels at compressing large files (usually > 10-50 MB). Larger files and/or more free RAM means that the utility will be able to more effectively compress your files (ie: faster / smaller size), especially if the filesize(s) exceed 100 MB. You can either choose to optimise for speed (fast compression / decompression) or size, but not both."
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File compression
7zip and XZ are almost always the best in any comparison. (They use the same algorithm.) Occasionally something new comes allong that may be bettyer, but it fades away... Like lrzip. https://lkml.org/lkml/2011/6/4/23 https://github.com/ckolivas/lrzip
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If we found a way to reverse a hashing function, would that make them ultra-compression algorithms?
For example lrzip has an intense "dupe hunting" mode and takes days for large content, but does compress very well once it's done (and expansion is fast). I use it on long term storage backups and disk images and junk. Completely incompatible with streaming, unlike chunk-based like gzip or deflate or etc, although unpacking can stream such as searching or verifying a tarfile archive. But the original source has to be file-based so seeking for the hunting can work across the entire file-as-a-block.
- Lrzip – Long Range Zip or LZMA RZIP
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Ask HN: How would you store 10PB of data for your startup today?
Best I know of for that is something like lrzip still, but even then it's probably not state of the art. https://github.com/ckolivas/lrzip
It'll also take a hell of a long time to do the compression and decompression. It'd probably be better to do some kind of chunking and deduplication instead of compression itself simply because I don't think you're ever going to have enough ram to store any kind of dictionary that would effectively handle so much data. You'd also not want to have to re-read and reconstruct that dictionary to get at some random image too.
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Encrypted Backup Shootout
There's also lrzip for large files: https://github.com/ckolivas/lrzip
What are some alternatives?
BorgBackup - Deduplicating archiver with compression and authenticated encryption.
bupstash - Easy and efficient encrypted backups.
rclone - "rsync for cloud storage" - Google Drive, S3, Dropbox, Backblaze B2, One Drive, Swift, Hubic, Wasabi, Google Cloud Storage, Azure Blob, Azure Files, Yandex Files
rdedup - Data deduplication engine, supporting optional compression and public key encryption.
restic - Fast, secure, efficient backup program
LeoFS - The LeoFS Storage System
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.
Duplicati - Store securely encrypted backups in the cloud!
ParlAI - A framework for training and evaluating AI models on a variety of openly available dialogue datasets.
Bup - Very efficient backup system based on the git packfile format, providing fast incremental saves and global deduplication (among and within files, including virtual machine images). Please post problems or patches to the mailing list for discussion (see the end of the README below).
nfreezer - nFreezer is an encrypted-at-rest backup tool.