Hi, Quoting Herbert Poetzl <[EMAIL PROTECTED]>:
Ading to Herberts comments. > On Tue, Jun 17, 2003 at 01:44:00PM -0500, John Goerzen wrote: > > it can do "copy on write" hard links for binaries > > between one system and the next. Yes, but it does not work that way.... tar has a -U option unlink & recreate files instead of overwriting Package istallation from .rpm or .deb does this or rename and copy. > anyway, there is something called IMMUTABLE-LINK-INVERSION >From - vserver 0.6 changes log http://www.solucorp.qc.ca/changes.hc?projet=vserver&version=0.6 it looks like this is now part of the ctx patch but probably only for ext2 Does anyone maintain the modified e2fsprogs package? Sam's patch is for version 1.25. > > I have never used this feature since I'm running Debian. > > However, I'm interested in the mechanics, and I'm wondering > > if the system can ... "combine" systems post-install. I know of no problem doing this any time you like. > it can be used, although it's not copy on write, as you > will know now ... copy on write would be better, then one could blindly unify all files that are the same. If you can work that out, e.g. using VFS or something you would make many people happy. Interesting comment from GCFS: a Garbage-Collected Filesystem for Linux http://www.eleves.ens.fr:8080/home/madore/linux/gcfs/ ..... This �copy on write� idea is also completely independent from the GCFS. I should be asking myself whether it could be implemented in a traditional (gc-less) filesystem, but every time I try to think about this question, my mind seems to go bezerk. ..... > > If I knew the APIs, I'd be happy to write such a tool myself. You can look at: fdupes - install with dselect or a perl script fast-dupemerge http://www.furryterror.org/~zblaxell/dupemerge/ > there where several proposals, and as far as I remember > Sam is actually maintaining (at least from time to time) > a tool to unify on debian and similar systems ... I found unify-dirs at http://mirrors.paul.sladen.org/sam.vilain.net/vserver/ --- Also interesting to look at User-mode Linux -- Sharing Filesystems between Virtual Machines http://user-mode-linux.sourceforge.net/shared_fs.html -- Host file access http://user-mode-linux.sourceforge.net/hostfs.html best ragnar
