mergerfs is a union file system geared towards simplifying storage and management of files across numerous commodity storage devices. It is similar to mhddfs, unionfs, and aufs.

udftools is a set of programs for reading and modifying UDF file systems. UDF is a file system mostly used for DVDs and other optical media. It supports read-only media (DVD/CD-R) and rewritable media that wears out (DVD/CD-RW).

This package provides the statically-linked bcachefs from a minimal bcachefs-tools package. It is meant to be used in initrds.

DwarFS is a read-only file system with a focus on achieving very high compression ratios in particular for very redundant data.

DwarFS also doesn't compromise on speed and for some cases it is on par with or performs better than SquashFS. For the primary use case, DwarFS compression is an order of magnitude better than SquashFS compression, it's 6 times faster to build the file system, it's typically faster to access files on DwarFS and it uses less CPU resources.

Distinct features of DwarFS are:

• Clustering of files by similarity using a similarity hash function. This makes it easier to exploit the redundancy across file boundaries.

• Segmentation analysis across file system blocks in order to reduce the size of the uncompressed file system. This saves memory when using the compressed file system and thus potentially allows for higher cache hit rates as more data can be kept in the cache.

• Highly multi-threaded implementation. Both the file system creation tool as well as the FUSE driver are able to make good use of the many cores of your system.

• Optional experimental Python scripting support to provide custom filtering and ordering functionality.

AVFS is a FUSE-based filesystem that allows browsing of compressed files. It provides the mountavfs command that starts a small avfsd daemon. When a specially formatted path under ~/.avfs is accessed, the daemon provides listings and content access on the fly. The canonical form of virtual file name is:

[basepath]#handler[options][:parameters][/internalpath]

Example file names:

• ~/.avfs/home/user/archive.tar.gz#ugz#utar/path/file

• ~/.avfs/#http:localhost|some|path

emacs-dired-hacks has dired-avfs module which enables seamless integration with avfs.

bindfs is a FUSE file system for mounting a directory to another location, similar to mount --bind. It can be used for:

• Making a directory read-only.

• Making all executables non-executable.

• Sharing a directory with a list of users (or groups).

• Modifying permission bits using rules with chmod-like syntax.

• Changing the permissions with which files are created.

Gocryptfs is an encrypted overlay filesystem written in Go. It features a file-based encryption that is implemented as a mountable FUSE filesystem.

Gocryptfs was inspired by EncFS and strives to fix its security issues while providing good performance. Gocryptfs is as fast as EncFS in the default mode and significantly faster than paranoia mode in EncFS, which provides a security level comparable to Gocryptfs.

On CPUs without AES-NI, gocryptfs uses OpenSSL through a thin wrapper called stupidgcm. This provides a 4x speedup compared to Go's builtin AES-GCM implementation.

This package provides the Linux kernel module for Bcachefs.

Bcachefs is a CoW file system supporting native encryption, compression, snapshots, and (meta)data checksums. It can use multiple block devices for replication and/or performance, similar to RAID.

In addition, Bcachefs provides all the functionality of bcache, a block-layer caching system, and lets you assign different roles to each device based on its performance and other characteristics.

NILFS is a log-structured file system supporting versioning of the entire file system and continuous snapshotting, which allows users to even restore files mistakenly overwritten or destroyed just a few seconds ago.

GPhotoFS is a FUSE file system module to mount your camera as a file system on Linux. This allow using your camera with any tool able to read from a mounted file system.

This package provides an implementation of the exFAT file system, including command-line tools to validate exFAT file systems and to create new ones.

This package provides an implementation of overlay+shiftfs in FUSE for rootless containers.

The FSQA regression test suite, more commonly known as xfstests, comprises over 1,500 tests that exercise (torture) both the user- and kernel-space parts of many different file systems.

As the package's name subtly implies, it was originally developed to test the XFS file system. Today, xfstests is the primary test suite for all major file systems supported by the kernel Linux including XFS, ext4, and Btrfs, but also virtual and network file systems such as NFS, 9P, and the overlay file system.

The packaged check script is not in PATH but can be invoked with the included xfstests-check helper.

BEES is a block-oriented, user-space deduplication agent designed for large btrfs file systems. It combines off-line data deduplication with incremental scanning to minimize the time your data spend on disk between being written and being deduplicated.

This package provides the user space component of CacheFiles, a caching back end that uses a directory on a locally mounted file system (such as ext4) as a cache to speed up (by reducing) access to a slower file system and make it appear more reliable.

The cached file system is often a network file system such as NFS or CIFS, but can also be a local file system like ISO 9660 on a slow optical drive.

CacheFiles itself is part of the kernel but relies on this user space cachefilesd daemon to perform maintenance tasks like culling and reaping stale nodes. Only one such daemon can be running at a time, and communicates with the kernel through the /dev/cachefiles character device.

This version modifies David Howells original cachefilesd---which appears unmaintained---to use the inotify API instead of the deprecated dnotify to monitor file changes.

Squashfuse lets you mount SquashFS archives in user-space. It supports almost all features of the SquashFS format, yet is still fast and memory-efficient.

The WebDAV extension to the HTTP protocol defines a standard way to author resources on a remote Web server. Davfs2 exposes such resources as a typical file system which can be used by standard applications with no built-in support for WebDAV, such as the GNU coreutils (cp, mv, etc.) or a graphical word processor.

Davfs2 works with most WebDAV servers with no or little configuration. It supports TLS (HTTPS), HTTP proxies, HTTP basic and digest authentication, and client certificates. It performs extensive caching to avoid unnecessary network traffic, stay responsive even over slow or unreliable connections, and prevent data loss. It aims to make use by unprivileged users as easy and secure as possible.

However, davfs2 is not a full-featured WebDAV client. The file system interface and the WebDAV protocol are quite different. Translating between the two is not always possible.

LIBNFS is a client library for accessing NFS shares over a network. LIBNFS offers three different APIs, for different use :

1. RAW, a fully asynchronous low level RPC library for NFS protocols. This API provides very flexible and precise control of the RPC issued.

2. NFS ASYNC, a fully asynchronous library for high level vfs functions

3. NFS SYNC, a synchronous library for high level vfs functions.

This package provides Snapper, a tool that helps with managing snapshots of Btrfs subvolumes and thin-provisioned LVM volumes. It can create and compare snapshots, revert differences between them, and supports automatic snapshots timelines.

SiriKali is a Qt/C++ GUI application for managing encrypted folders. It supports various backends, including eCryptfs, CryFS, EncFS, gocryptfs, fscrypt, securefs, SSHFS, and Cryptomator.

This package provides the bcachefs command-line tool with many subcommands for creating, checking, and otherwise managing bcachefs file systems. Traditional aliases like mkfs.bcachefs are also included.

Bcachefs is a CoW file system supporting native encryption, compression, snapshots, and (meta)data checksums. It can use multiple block devices for replication and/or performance, similar to RAID.

In addition, bcachefs provides all the functionality of bcache, a block-layer caching system, and lets you assign different roles to each device based on its performance and other characteristics.

mergerfs-tools is a suite of programs that can audit permissions and ownership of files and directories on a mergerfs volume, duplicates files and directories across branches in its pool, find and remove duplicate files, balance pool drives, consolidate files in a single mergerfs directory onto a single drive and create FreeDesktop.org Trash specification compatible directories.

An alternative implementation of the zfs-auto-snapshot service for Linux that is compatible with zfs-linux (now OpenZFS) and zfs-fuse.

On Guix System, you will need to invoke the included shell scripts as job definitions in your operating-system declaration.

Libeatmydata transparently disables most ways a program might force data to be written to the file system, such as fsync() or open(O_SYNC).

Such synchronisation calls provide important data integrity guarantees but are expensive to perform and can significantly slow down software that (over)uses them.

This price is worth paying if you care about the files being modified---which is typically the case---or when manipulating important components of your system. Please, do not use something called ``eat my data'' in such cases!

However, it does not make sense to accept this performance hit if the data is unimportant and you can afford to lose all of it in the event of a crash, for example when running a software test suite. Adding libeatmydata.so to the LD_PRELOAD environment of such tasks will override all C library data synchronisation functions with custom no-op ones that do nothing and immediately return success.

A simple eatmydata script is included that does this for you.