Re: [gentoo-user] Compressed Filesystem

[Volker Armin Hemmann <volkerarmin@googlemail.com>]

On Dienstag 29 Dezember 2009, Helmut Jarausch wrote:
> On 28 Dec, Volker Armin Hemmann wrote:
> > On Montag 28 Dezember 2009, Helmut Jarausch wrote:
> >> Hi,
> >>
> >> I'm looking for a working and maintained compressed filesystem.
> >> I'd like to use it for backing up my root and my /usr filesystems,
> >> so that I can use rsync to keep it up-to-date.
> >>
> >> I've come across CompFused which seems to be just what I'm looking for,
> >> but it's buggy not maintained anymore.
> >>
> >> Similarly, fusecompress
> >> http://bugs.gentoo.org/show_bug.cgi?id=127433
> >> doesn't build on an up-to-date Gentoo system and doesn't
> >> look maintained either.
> >>
> >> There would be sys-fs/zfs-fuse but that sounds like overkill to me.
> >>
> >> Are there any other packages?
> >>
> >> Many thanks for a hint,
> >> Helmut.
> >
> > reiser4. Bonus, it only tries to compress stuff that can be compressed
> > (the test is quick&dirty and sometimes wrong, but most of the time good
> > enough).
> 
> Thanks!
> But what's the future of reiser4 FS ? What are the advantages compared
> to btrfs ?

reiser4 was denied for 'layer violation'.
btrfs violates those layers even more.

I do no know btrfs. But there are two nice things about reiser4:
it takes your data seriously. It tries everything to make sure your data hit 
the platter. Device does not support barriers? Reiser4 detects that and goes 
into sync mode.
Second, reiser4 is really, really really fast (except mounting).