#bzip2 — Public Fediverse posts

Archivierung und Kompression mit tar: Grundlagen, Optionen und Beispiele

https://andreas-moor.de/archivierung-und-kompression-mit-tar-grundlagen-optionen-und-beispiele/

Kompression mit zip: Grundlagen, Optionen und Beispiele

https://andreas-moor.de/kompression-mit-zip-grundlagen-optionen-und-beispiele/

Kompression mit bzip2 Linux: Grundlagen, Optionen und Beispiele

https://andreas-moor.de/kompression-mit-bzip2-linux-grundlagen-optionen-und-beispiele/

Kompression mit gzip: Grundlagen, Optionen und Beispiele

https://andreas-moor.de/kompression-mit-gzip-grundlagen-optionen-und-beispiele/

Vergleich von Archivierung und Kompression unter Linux: tar/star, gzip, bzip2, xz und zip

https://andreas-moor.de/vergleich-von-archivierung-und-kompression-unter-linux-tar-star-gzip-bzip2-xz-und-zip/

Xz format inadequate for general use
https://www.nongnu.org/lzip/xz_inadequate.html
#ycombinator #lzip #LZMA #bzip2 #gzip #data_compression #long_term_archiving

🎉 Behold, the groundbreaking revelation: #Xz is not the Holy Grail of data formats! 🚀 Apparently, using xz for digital preservation is like using a sieve as a bucket—bound to fail. Who knew? 🤦‍♂️ Stick to #bzip2, #gzip, or #lzip if you want actual functionality and avoid sinking your data into the abyss of inadequacy. 🔍💾
https://www.nongnu.org/lzip/xz_inadequate.html #dataformats #digitalpreservation #HackerNews #ngated

🚀 Oh, the riveting #saga continues! Witness as #Ada, the language nobody asked for, takes on yet another #unnecessary feat: building a #BZip2 #encoder that absolutely nobody needed – in #record time! 🤯 Part 2, because once wasn't enough! 🤡
https://gautiersblog.blogspot.com/2025/07/writing-bzip2-encoder-in-ada-from.html #Feat #Time #Part2 #HackerNews #ngated

@ermo

I'm very slowly creeping towards having checksum files auto-built. There's a missing part that needs to be done.

But I'm at least over one initial hurdle of switching from pax -z to pax -j. Not that that helps in the #FreeBSD 10 case because FreeBSD 10's pax does not have -j.

(Make an archive with -z and it isn't idempotent, because #gzip has a timestamp.)

So there's still the installing #GhostBSD mountain to climb, and seeing whether that has pax -j yet. (-:

#bzip2 #pax

That's it for the benchmarking! You can find my implementation at http://github.com/anisse/lbzip2-rs/ ; it's very much PoC-quality code, so use at our own risks! I chose to manually spawn threads instead of using rayon or an async runtime; there are other things I'm not proud of, like busy-waiting instead of condvar for example. 14/N

#lbzip2 #bzip2 #RustLang #async #rayon

That gives us our baseline: bzip2 (in C) vs bzip2 (in Rust). But is it a fair enough comparison? I mentioned initially that I was implementing an lbzip2 "clone" (mostly a PoC for the decompression part). lbzip2 is an other program (a C binary, without a library), that can compress and decompress bzip2 files in parallel. Surely it should be slower than bzip2 since it has the parallel management overhead? 7/N

#lbzip2 #bzip2 #RustLang #perf

But why? Let's see what perf stat has to say: the Rust version has less instructions, but with much less IPC (Instruction-per-clock); the Rust version also has less branches and misses in general. On the efficiency cores, we see that worse IPC and branch prediction of the Rust version give the advantage to the C version. 6/N

#bzip2 #RustLang #perf

Bzip2 crate switches from C to 100% rust

https://trifectatech.org/blog/bzip2-crate-switches-from-c-to-rust/

#HackerNews #Bzip2 #Crate #Rust #Switch #C #RustLang #OpenSource #Programming

The new alpm-package #crate offers integration with #ALPM based #package files. 📦 🦀

https://crates.io/crates/alpm-package/0.1.0

Currently it allows to create package files from prepared input directories and supports the #bzip2 #gzip #xz and #zstd #compression algorithms.

#ArchLinux #RustLang #SoftwareRelease

#libzip 1.11.4 has been released (#LZMA / #ZIP / #Zip64 / #zstd / #Zstandard / #bzip2 / #AES / #PKWARE / #FileArchiver / #DataCompression) https://libzip.org/

New #blog post: Unix Data Compression Shootout

https://rldane.space/unix-data-compression-shootout.html

881 words

cc: my wonderful #chorus: @joel @dm @sotolf @thedoctor @pixx @twizzay @orbitalmartian @adamsdesk @krafter @roguefoam @clayton @giantspacesquid

(I will happily add/remove you from the chorus upon request! :)

#100DaysToOffload #32

#rlDaneWriting #Unix #Linux #BSD #DataCompression #gzip #bzip #bzip2 #bzip3 #zstd #zst #xz #lz4 #compression

#libarchive 3.7.9 has been released (#MultiFormatArchive / #CompressionLibrary / #FileArchiver / #DataCompression / #7Zip / #7z / #RAR / #ZIP / #GZip / #TAR / #XAR / #WARC / #BZIP2 / #XZ) https://www.libarchive.org/

BZip3

在 Hacker News 上看到 BZip3 的連結：「Bzip3: A spiritual successor to BZip2 (github.com/kspalaiologos)」。

雖然名字看起來與 bzip2 有關，但看起來是不同的人弄出來的東西，不過有些經典的演算法有留下來用，像是 Burrows-Wheeler transform。

另外值得一提的是，bzip2 是 1996 年出的 (不過 1.0 大約是 2000 年時出的)，BZip3 的第一個 release 在 2022 年，這段時間也累積了不少有趣的演算法可以用。

無損壓縮中如果期望有比較的壓縮率，目前比較常用的應該是 LZMA 類的演算法 (差不多是 2001 年出現的)，用的工具通常會是 X

https://blog.gslin.org/archives/2025/02/02/12240/bzip3/

#Computer #Murmuring #Software #bzip2 #bzip3 #compression #lzma #ratio #xz

Rilasciato #PeaZip 10.0
https://www.laseroffice.it/blog/2024/10/26/rilasciato-peazip-10-0/

#UnoLinux #compressionedati #7z #zstd #zstandard #gzip #bzip2 #xz #rar #zip #7zip

@GNUmatic As someone who's never really done a deep dive into the technical details and pros and cons of #compression formats, I found that article to be completely insane! I want to hear someone try to argue the other side, because this is so damning that I want to make sure it's not just the author's #bias. :blob_dizzy_face:

On a related note: why do you prefer #bzip2 over #lzip, if I may ask? Because to be frank, I've never heard of the latter before now, and yet I'm about to install tarlz on my machine.

#FileFormat #xz

Xz format inadequate for long-term archiving
https://www.nongnu.org/lzip/xz_inadequate.html
#ycombinator #lzip #LZMA #bzip2 #gzip #data_compression #long_term_archiving

#dar 3/ Dar's homepage is http://dar.linux.free.fr/ . As a simple file archiver tool, dar is great. Random access is preserved, you can compress with #gzip #bzip2 #lzo #xz #zstd or #lz4. You can encrypt with #GnuPG or symmetric #AES. You can stream if you want. You can split ("slice") across multiple media, and dar will prompt you for the slice(s) you need and seek you right to them.

That's cool, but we're just getting started.

#dar 3/ Dar's homepage is http://dar.linux.free.fr/ . As a simple file archiver tool, dar is great. Random access is preserved, you can compress with #gzip #bzip2 #lzo #xz #zstd or #lz4. You can encrypt with #GnuPG or symmetric #AES. You can stream if you want. You can split ("slice") across multiple media, and dar will prompt you for the slice(s) you need and seek you right to them.

That's cool, but we're just getting started.

#dar 3/ Dar's homepage is http://dar.linux.free.fr/ . As a simple file archiver tool, dar is great. Random access is preserved, you can compress with #gzip #bzip2 #lzo #xz #zstd or #lz4. You can encrypt with #GnuPG or symmetric #AES. You can stream if you want. You can split ("slice") across multiple media, and dar will prompt you for the slice(s) you need and seek you right to them.

That's cool, but we're just getting started.

#dar 3/ Dar's homepage is http://dar.linux.free.fr/ . As a simple file archiver tool, dar is great. Random access is preserved, you can compress with #gzip #bzip2 #lzo #xz #zstd or #lz4. You can encrypt with #GnuPG or symmetric #AES. You can stream if you want. You can split ("slice") across multiple media, and dar will prompt you for the slice(s) you need and seek you right to them.

That's cool, but we're just getting started.

#dar 3/ Dar's homepage is http://dar.linux.free.fr/ . As a simple file archiver tool, dar is great. Random access is preserved, you can compress with #gzip #bzip2 #lzo #xz #zstd or #lz4. You can encrypt with #GnuPG or symmetric #AES. You can stream if you want. You can split ("slice") across multiple media, and dar will prompt you for the slice(s) you need and seek you right to them.

That's cool, but we're just getting started.

#zutils are compressed data handlers.

zutils is a collection of simple tools that transparently handle a mix of uncompressed and compressed data in a number of formats. zutils includes zcat (for decompression), zdiff, zgrep, and ztest (for integrity checks). zutils handles #gzip, #bzip2, #xz, and #lzip in any combination.

Website 🔗️: https://www.nongnu.org/zutils/zutils.html

apt 📦️: zutils

#free #opensource #foss #fossmendations #sysadmin