TIL that xfs has supported copy-on-write reflink copies for years, where as zfs only got it last year (and it is not considered stable!)
https://blogs.oracle.com/linux/post/xfs-data-block-sharing-reflink
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3FS: A high-performance distributed file system designed to address the challenges of AI training and inference workloads
GitHubGitHub - deepseek-ai/3FS: A high-performance distributed file system designed to address the challenges of AI training and inference workloads. A high-performance distributed file system designed to address the challenges of AI training and inference workloads. - GitHub - deepseek-ai/3FS: A high-performance distributed file system design...
File System Forensics by Fergus Toolan, 2025
Comprehensive forensic reference explaining how file systems function and how forensic tools might work on particular file systems. File System Forensics delivers comprehensive knowledge of how file systems function and, more importantly, how digital forensic tools might function in relation to specific file systems.
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One of the main criticisms I read about ZFS (mainly OpenZFS) in forums and articles is that "it's not well integrated into Linux."
It's true - there is a licensing issue, and that shouldn't be underestimated. However, I believe it's wrong to judge it based on this - on FreeBSD, it is perfectly integrated (not to mention the various illumos-based OSes), and in my opinion, it should be judged for what it is, not for its integration into the different Linux distributions.
ung Surely someone's looked into this: if I wanted to store millions or billions of files on a filesystem, I wouldn't store them in one single subdirectory / folder. I'd split them up into nested folders, so each folder held, say, 100 or 1000 or n files or folders. What's the optimum n for filesystems, for performance or space?
I've idly pondered how to experimentally gather some crude statistics, but it feels like I'm just forgetting to search some obvious keywords.
#BillionFileFS #linux #filesystems #optimization #benchmarking
HDD SSD space should be counted in binary.
1KB in binary is 1024.
A 32 TB hard drive is in fact 30.517578125 TB unpartitioned /unformatted capacity, as the binary system on the computer actually uses it
I know about all those confusing terms that you can find when you go and search on different engines; those are just to confuse and convolute the fact that drives sold are under capacity
Counting storage in decimals is a crime, a marketing scheme which should have been outlawed globally.
Replied in thread
Just did some homework on .DS_Store files and saw that they are also crapped on foreign filesystems, when a mac accessed those. That is seriously wrong
Luckily that seems to be reversed
Wow - I had never heard of the "HFS pixel" in the Macintosh Finder before now. Is this common knowledge?
From a post by @rezmason, mentioned in my feed by @splorp.
From page 66 of "Encyclopedia Macintosh" (1990)
PDF: https://vintageapple.org/macbooks/pdf/Encyclopedia_Macintosh_1990.pdf
Well fuck me.... This is definitely not the way how I wanted to start my day.
#btrfs #filesystems #sysadmin
Been reading up a bit trying to decide which file system I want to use when I redo my home server soon. Think I'm leaning towards giving btrfs a go. Curious what the splits are on fedi. I've only ever used ext4 on Linux. I'm guessing for desktop/home server use, xfs isn't very popular. Just including it here since it's in this article.
#Linux #FileSystems #EXT4 #BTRFS #ZFS #XFS
https://blog.usro.net/2024/10/linux-file-systems-comparison/
Ultimate Systems Blog · Linux File Systems Comparison
macOS's filesystem is infuriating. I have 35GB of free space according to df -h. I removed multiple files of over 10GB each, and now I have 16GB of space. Make it make sense.
Convicted murderer, filesystem creator writes of regrets to Linux list - Enlarge / A portion of the cover letter attached to Hans Reiser's respo... - https://arstechnica.com/?p=1997385 #linuxkernelmailinglist #filesystems #linuxkernel #hansreiser #reiserfs #biz #linux #tech #lkml
Ars Technica · Convicted murderer, filesystem creator writes of regrets to Linux list"The man I am now would do things very differently," Reiser says in long letter.
ReiserFS is now “obsolete” in the Linux kernel and should be gone by 2025 - Enlarge / An Alameda County couple watches as investigators prepare to ... - https://arstechnica.com/?p=1964740 #filesystems #filesystem #hansreiser #reiserfs #biz #linux #tech #zfs
Ars Technica · ReiserFS is now “obsolete” in the Linux kernel and should be gone by 2025 [Updated]A little-used file system named for a convicted murderer is slated for removal.
how is *your* monday going? #dev #fileSystems #continuousDelivery
Continued thread
And eventually it will cause file system corruption on the drive you are copying to if you bump up against your boot filesystems free space.
I just got it to toast a couple of Sandisk Extreme Pro 4TB SSDs, just copy & pasting between them.
All file systems might eventually become unmountable, but disk recovery can see alll the data.
Really weird bug to figure out. Thought it was my TB ports! 
TIL. On current versions of MacOS, don't use CMD-C/V to move large files around. Drag and drop.
The copy/paste invokes clipboard semantics and engages Handoff and makes large file(s) in /private/var
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Found it!
It's caused by using CMD-C, CMD-V to move file instead of drag-n-drop.
Handoff is enabled by default for "clipboard" operations, so we get spare a copy for the iPhone :-)
It fills up /var with (a) large temp file(s). I caught it in the act with Daisy Disk
A #linux (and #unix) guy with varied interests in the #kernel, #networking and #filesystems, generally #sysadmin stuff, some computer languages, a few earlier technologies #m68k #z80 #6502cpu, and #retrocomputing history including old arcade games (thus #fpga).
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