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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

TOOLS