cowdancer allows copy-on-write file access. You can copy a full tree using hard links, and cowdancer will create a new copy when you need to write to a file. It's completely implemented in userland, and should run on most Linux filesystems.
|Operating Systems||POSIX Linux|
Release Notes: This release supports spaces in filenames.
Release Notes: This release check for error values on COW operations and returns errors to the application with ENOMEM.
Release Notes: A pthread race condition on initialization was fixed.
Release Notes: This release fixes a problem found during stress testing. It changes the order of copying for the case when /lib/ld.so binary is written to; shared binaries cannot be forked/exec'd while ld.so does not exist.
Release Notes: Speed improvements were made. The binary ilist is saved in cow-shell and loaded mmap in cowdancer. The ilist is now also sorted. The code is now a bit more thread-safe.