mergerfs/mkdocs/docs/index.md

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# mergerfs - a featureful union filesystem
## DESCRIPTION
**mergerfs** is a union filesystem geared towards simplifying storage
and management of files across numerous commodity storage devices. It
is similar to **mhddfs**, **unionfs**, and **aufs**.
## FEATURES
- Configurable behaviors / file placement
- Ability to add or remove filesystems at will
- Resistance to individual filesystem failure
- Support for extended attributes (xattrs)
- Support for file attributes (chattr)
- Runtime configurable (via xattrs)
- Works with heterogeneous filesystem types
- Moving of file when filesystem runs out of space while writing
- Ignore read-only filesystems when creating files
- Turn read-only files into symlinks to underlying file
- Hard link copy-on-write / CoW
- Support for POSIX ACLs
- Misc other things
## SYNOPSIS
mergerfs -o<options> <branches> <mountpoint>
## DOCUMENTATION
- [https://trapexit.github.io/mergerfs/](https://trapexit.github.io/mergerfs/)
## TOOLS
- [mergerfs tools](https://github.com/trapexit/mergerfs-tools)