I’ve been working on a CLI tool recently, and one of the things it does is manage files on disk. I have written a lot of file management tests for Bundler, and the two biggest reasons that the Bundler test suite is slow are exec and fstat. Knowing that, I thought I would try to get out ahead of the slow file stat problem by using an in-memory filesystem for testing. A collaborator mentioned being
WinBtrfs is a Windows driver for the next-generation Linux filesystem Btrfs. A reimplementation from scratch, it contains no code from the Linux kernel, and should work on any version from Windows XP onwards. It is also included as part of the free operating system ReactOS. If your Btrfs filesystem is on a MD software RAID device created by Linux, you will also need WinMD to get this to appear und
この記事ははてなエンジニア Advent Calendar 2023の 12月36日 2024年1月5日の記事です。 developer.hatenastaff.com Mackerel をファイルシステムにしてみましょう。 Mackerel でファイルシステムを監視するのではありません。 Mackerel をファイルシステムにするのです。 じゃん mackerelfs と言います。よろしくおねがいします。 github.com /home/rmatsuoka/mackerel ディレクトリに mackerelfs をマウントしましょう（マウントの方法は後半説明します。）最初は ctl ファイルだけがあります。 $ ls -l total 0 --w--w--w- 1 rmatsuoka rmatsuoka 0 Jul 14 2042 ctl さて Mackerel を操作するときは AP
This is an incomplete but very functional implementation of an NFSv3 server in Rust. Why? You may ask. I wanted to implement a user-mode file-system mount that is truly cross-platform. What is a protocol that pretty much every OS supports? NFS. Why not FUSE you may ask: FUSE is annoying to users on Mac and Windows (drivers necessary). It takes a lot of care to build a FUSE driver for remote filesy
FizzBuzzFS FizzBuzz問題といえば定期的にSNSで話題になっては変な解法が発明されることでおなじみですが(?)、ファイルシステムを使った事例が見当たらなかったのでやってみました。 まあ見ての通りというか…… /mnt/FizzBuzz に FizzBuzz.txt(8エクサバイト)があって、FizzBuzzが書いてあります。 どこまでも…… 容量の続く限り…… 以上！！！！！！！ 技術解説 FUSE FUSE(Filesystem in USEr space)というソフトウェアを使うことで、簡単に新しいファイルシステムを実装することが可能です。 Rustにおいては、fuse crateの更新が停止した結果フォークが複数存在するようですが、利用者数と更新頻度的にfuser crateを使うのがよさそうです。 FileSystem traitが実装された値をmount2関数に渡
Do computation when we want to, i.e.: Image building should be fast Image mounting/reading should be fast Optional "canonicalization" step in the middle No full-tree walk required mtree style walks of filesystems are not necessary with clever use of overlay casync style generate-a-tar-then-diff is more for general purpose use where you don't want to have a special filesystem setup Be simple enough
Going through the files inside a tab's folder. For example, the url.txt, text.txt, and title.txt files tell me those live properties of this tab (Read more up-to-date documentation for all of TabFS's files here.) This gives you a ton of power, because now you can apply all the existing tools on your computer that already know how to deal with files -- terminal commands, scripting languages, point-
The problem: data corruption I decided it was finally time to build a file server to centralize my files and guard them against bit-rot. Although I would have preferred to use OpenBSD due to its straightforward configuration and sane defaults, I was surprised to find that none of the typical NAS filesystems were supported. In particular I would need three features in such a filesystem. Firstly I w
Supertag is a tag-based file system, written in Rust, that provides a unique view of your files by removing the hierarchy constraints typically imposed on files and folders. In other words, it allows you to think about your files not as objects stored in folders, but as objects that can be filtered by folders. Below, the file path /A/B/C yields the intersection of all of the files that have been t
Other useful links Roadmap Wishlist User manual Developer documentation BtreeIterators BtreeNodes BtreeWhiteouts Encryption Transactions Snapshots Allocator Fsck TestServerSetup StablePages October 2022 talk for Redhat "The COW filesystem for Linux that won't eat your data". Bcachefs is an advanced new filesystem for Linux, with an emphasis on reliability and robustness and the complete set of fea
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